Journal Description
Acta Microbiologica Hellenica
Acta Microbiologica Hellenica
(AMH) is an international, peer-reviewed, open access journal on medical microbiology. The journal is owned by the Hellenic Society for Microbiology and is published quarterly online by MDPI (since Volume 69, Issue 1 - 2024). HMS members receive discounts on the article processing charges.
- Open Access— free for readers, with article processing charges (APC) paid by authors or their institutions.
- High Visibility: indexed within Scopus, Biological Abstracts and BIOSIS Previews (Web of Science), and other databases.
- Rapid Publication: manuscripts are peer-reviewed and a first decision is provided to authors approximately 24.1 days after submission; acceptance to publication is undertaken in 9.3 days (median values for papers published in this journal in the first half of 2025).
- Recognition of Reviewers: APC discount vouchers, optional signed peer review, and reviewer names published annually in the journal.
Latest Articles
The Impact of Genital Infections on Women’s Fertility
Acta Microbiol. Hell. 2025, 70(3), 33; https://doi.org/10.3390/amh70030033 - 7 Aug 2025
Abstract
Sexually transmitted infections (STIs) are a significant global health concern, affecting millions of people worldwide, particularly sexually active adolescents and young adults. These infections, caused by various pathogens, including bacteria, viruses, parasites, and fungi, can have profound implications for women’s reproductive health and
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Sexually transmitted infections (STIs) are a significant global health concern, affecting millions of people worldwide, particularly sexually active adolescents and young adults. These infections, caused by various pathogens, including bacteria, viruses, parasites, and fungi, can have profound implications for women’s reproductive health and fertility. This review explores the role of vaginal and uterine infections in women’s infertility, focusing on the most common pathogens and their impact on reproductive outcomes. Bacterial infections, such as those caused by intracellular bacteria (Mycoplasma, Ureaplasma, and Chlamydia), Neisseria gonorrhoeae, and bacterial vaginosis, are among the most prevalent causes of infertility in women. Studies have shown that these infections can lead to pelvic inflammatory disease, tubal occlusion, and endometrial damage, all of which can impair fertility. Mycobacterium tuberculosis, in particular, is a significant cause of genital tuberculosis and infertility in high-incidence countries. Viral infections, such as Human papillomavirus (HPV) and Herpes simplex virus (HSV), can also affect women’s fertility. While the exact role of HPV in female infertility remains unclear, studies suggest that it may increase the risk of endometrial implantation issues and miscarriage. HSV may be associated with unexplained infertility. Parasitic infections, such as trichomoniasis and schistosomiasis, can directly impact the female reproductive system, leading to infertility, ectopic pregnancy, and other complications. Fungal infections, such as candidiasis, are common but rarely have serious outcomes related to fertility. The vaginal microbiome plays a crucial role in maintaining reproductive health, and alterations in the microbial balance can increase susceptibility to STIs and infertility. Probiotics have been proposed as a potential therapeutic strategy to restore the vaginal ecosystem and improve fertility outcomes, although further research is needed to establish their efficacy. In conclusion, vaginal and uterine infections contribute significantly to women’s infertility, with various pathogens affecting the reproductive system through different mechanisms. Early diagnosis, appropriate treatment, and preventive measures are essential to mitigate the impact of these infections on women’s reproductive health and fertility.
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Open AccessArticle
Assessment of Bacterial Contamination and Biofilm Formation in Popular Street Foods of Biskra, Algeria
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Sara Boulmaiz, Ammar Ayachi and Widad Bouguenoun
Acta Microbiol. Hell. 2025, 70(3), 32; https://doi.org/10.3390/amh70030032 - 28 Jul 2025
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This study assessed microbiological contamination in street-sold meat products, focusing on Enterobacterales and coagulase-negative staphylococci (CoNS) species and their antibiotic resistance. Chicken and mutton street foods like shawarma and brochettes were tested for bacterial load, species distribution. and resistance profiles. The results showed
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This study assessed microbiological contamination in street-sold meat products, focusing on Enterobacterales and coagulase-negative staphylococci (CoNS) species and their antibiotic resistance. Chicken and mutton street foods like shawarma and brochettes were tested for bacterial load, species distribution. and resistance profiles. The results showed significant contamination, with Enterobacter cloacae (5.38 Log 10 CFU/g). Staphylococcus lentus and Staphylococcus xylosus were also common, reaching 6.23 Log 10 CFU/g in some samples. Contamination levels varied significantly by food type, with chicken shawarma showing the highest risk. Antimicrobial susceptibility testing revealed high multidrug resistance, particularly among E. cloacae and Staphylococcus species. Biofilm formation an indicator of resistance was observed mainly in staphylococci and enhanced under fed-batch culture. These findings highlight public health concerns tied to poor hygiene and undercooking in street food environments. The study emphasizes the need for improved hygiene practices, standardized cooking methods, and systematic food safety monitoring to reduce contamination and antibiotic resistance risks.
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Open AccessArticle
Exposure to Treponema pallidum Alters Villous Histomorphology of Human Placentae
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Patience B. Tetteh-Quarcoo, Joana Twasam, John Ahenkorah, Bismarck Afedo Hottor, Nicholas T. K. D. Dayie, Stephen Opoku-Nyarko, Peter Ofori Appiah, Emmanuel Afutu, Fleischer C. N. Kotey, Eric S. Donkor, Emilia Asuquo Udofia, Nii Koney-Kwaku Koney, Benjamin Arko-Boham and Kevin Kofi Adutwum-Ofosu
Acta Microbiol. Hell. 2025, 70(3), 31; https://doi.org/10.3390/amh70030031 - 23 Jul 2025
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Syphilis, which is caused by Treponema pallidum, remains one of the most common congenital infection worldwide and has tremendous consequences for the mother and her developing foetus if left untreated. The complexity of the exposure to this pathogen extends beyond the well-established
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Syphilis, which is caused by Treponema pallidum, remains one of the most common congenital infection worldwide and has tremendous consequences for the mother and her developing foetus if left untreated. The complexity of the exposure to this pathogen extends beyond the well-established clinical manifestations, as it can profoundly affect placental histomorphology. This study aimed to compare T. pallidum-exposed placental villi structures with healthy placentae at term to evaluate the histomorphological differences using stereology. In this case-control study conducted at term (38 weeks ± 2 weeks), 78 placentae were collected from the hospital delivery suites, comprising 39 cases (T. pallidum-exposed) and 39 controls (non-exposed), who were gestational age-matched with other potential confounders excluded. Blood samples from the umbilical vein and placental basal plate were tested for syphilis, using rapid diagnostic test (RDT) kits for T. pallidum (TP) antibodies (IgG and IgM) to classify placentae as exposed to T. pallidum (cases) and non-exposed (controls). Tissue sections were prepared and stained with haematoxylin and eosin, and the mean volume densities of syncytial knots, foetal capillaries, syncytial denuded areas, and intervillous spaces were estimated using stereological methods. Statistical analysis was performed to compare the mean values between the case and control groups. Stereological assessment revealed significant differences between the T. pallidum-exposed and non-exposed groups with regard to syncytial knots (p < 0.0001), syncytial denudation (p < 0.0001), and foetal capillaries (p < 0.0001), but no significant difference in the intervillous space was found (p = 0.1592). Therefore, our study shows, for the first time, that the histomorphology of human placental villi appears to be altered by exposure to T. pallidum. It will, therefore, be interesting to determine whether these changes in the placental villi translate into long-term effects on the baby.
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Open AccessArticle
Genetic Diversity and Phylogenetic Analysis Among Multidrug-Resistant Pseudomonas spp. Isolated from Solid Waste Dump Sites and Dairy Farms
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Tuhina Das, Arkaprava Das, Neha Das, Rittika Mukherjee, Mousumi Saha, Dipanwita Das and Agniswar Sarkar
Acta Microbiol. Hell. 2025, 70(3), 30; https://doi.org/10.3390/amh70030030 - 16 Jul 2025
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The excessive use of antimicrobials drives the emergence of multidrug resistance (MDR) in bacterial strains, which harbor resistance genes to survive under diverse drug pressures. Such resistance can result in life-threatening infections. The predominance of MDR Pseudomonas spp. poses significant challenges to public
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The excessive use of antimicrobials drives the emergence of multidrug resistance (MDR) in bacterial strains, which harbor resistance genes to survive under diverse drug pressures. Such resistance can result in life-threatening infections. The predominance of MDR Pseudomonas spp. poses significant challenges to public health and environmental sustainability, particularly in ecosystems affected by human activities. Characterizing MDR Pseudomonas spp. is crucial for developing effective diagnostic tools and biosecurity protocols, with broader implications for managing other pathogenic bacteria. Strains were diagnosed through 16S rRNA PCR and sequencing, complemented by phylogenetic analysis to evaluate local and global evolutionary connections. Antibiotic susceptibility tests revealed extensive resistance across multiple classes, with MIC values surpassing clinical breakpoints. This study examined the genetic diversity, resistance potential, and phylogenetic relationships among Pseudomonas aeruginosa strain DG2 and Pseudomonas fluorescens strain FM3, which were isolated from solid waste dump sites (n = 30) and dairy farms (n = 22) in West Bengal, India. Phylogenetic analysis reveals distinct clusters that highlight significant geographic linkages and genetic variability among the strains. Significant biofilm production under antibiotic exposure markedly increased resistance levels. RAPD-PCR profiling revealed substantial genetic diversity among the isolates, indicating variations in their genetic makeup. In contrast, SDS-PAGE analysis provided insights into the protein expression patterns that are activated by stress, which are closely linked to MDR. This dual approach offers a clearer perspective on their adaptive responses to environmental stressors. This study underscores the need for vigilant monitoring of MDR Pseudomonas spp. in anthropogenically impacted environments to mitigate risks to human and animal health. Surveillance strategies combining phenotypic and molecular approaches are essential to assess the risks posed by resilient pathogens. Solid waste and dairy farm ecosystems emerge as critical reservoirs for the evolution and dissemination of MDR Pseudomonas spp.
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Open AccessArticle
Trichomonas vaginalis in Vaginal Samples from Symptomatic Women in Greece: Assessment of Test Performance and Prevalence Rate, and Comparison with European Prevalence Estimates
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Lazaros Tsoukalas, Constantine M. Vassalos, Nikos Gkitsakis, Panagiota Gkotzamani, Eleni Gkoumalatsou, Konstantia Bakalianou, Eleftheria Palla, Stavroula Baka, Constantina Skanavis and Evdokia Vassalou
Acta Microbiol. Hell. 2025, 70(3), 29; https://doi.org/10.3390/amh70030029 - 11 Jul 2025
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Trichomonas vaginalis infection (TVI) is the most common curable sexually transmitted infection (STI). In this study, we aimed to assess the performances of different tests for TVI diagnosis in symptomatic Greek women, evaluating the TVI prevalence rate (PR) in Greece and comparing the
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Trichomonas vaginalis infection (TVI) is the most common curable sexually transmitted infection (STI). In this study, we aimed to assess the performances of different tests for TVI diagnosis in symptomatic Greek women, evaluating the TVI prevalence rate (PR) in Greece and comparing the latter with TVI-PR estimates from Europe. A laboratory-based cross-sectional analysis and a meta-analysis were conducted. Of 399 symptomatic Greek women, 17 had TVI, corresponding to a TVI-PR of 4.3%. The commercial nucleic acid amplification test (NAAT) achieved a sensitivity of 94.1%, which was 6% higher than the sensitivity of the culture method, 35% higher than that of the wet mount test, and 59% higher than that of the Giemsa stain test. The wet mount test achieved the lowest positive predictive value of 76.9%. All the tests had high specificity levels and negative predictive values. Data from 34 European TVI-PR studies in symptomatic women were pooled. The TVI-PR established in our study was similar to the TVI-PR estimates of 4.8% in Europe and 4.5% in Greece, with the second being higher than those of 2.1% in Northwestern Europe and 1.5% in Southern Europe but closer to that of 6.7% in Türkiye. In Greece, a European country with a relatively high TVI-PR among symptomatic women, the highly sensitive and specific, automated, point-of-care NAAT would facilitate rapid, accurate TVI diagnosis and the treatment of this target population to meet the WHO’s goal of ending STI epidemics by 2030.
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Open AccessArticle
Oral Microbiome Diversity in Transfusion-Dependent Thalassemia Using a Metagenomic Approach in Indonesian Communities
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Wahyu Siswandari, Dyahayu Nisa Arini, Ali Taqwim, Shinta Prima Ardinas, Dwi Utami Anjarwati and Lantip Rujito
Acta Microbiol. Hell. 2025, 70(3), 28; https://doi.org/10.3390/amh70030028 - 3 Jul 2025
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Beta-thalassemia major is an inherited disorder that requires lifelong blood transfusions, with the risk of complications including poor oral health and dental caries. The objective of this study was to compare the oral microbiome diversity and composition in transfusion-dependent thalassemia patients and relate
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Beta-thalassemia major is an inherited disorder that requires lifelong blood transfusions, with the risk of complications including poor oral health and dental caries. The objective of this study was to compare the oral microbiome diversity and composition in transfusion-dependent thalassemia patients and relate it to oral hygiene and dental caries. A cross-sectional analysis of 35 patients of beta-thalassemia major aged 6–18 years was performed. The status of oral hygiene was examined through the Oral Hygiene Index—Simplified (OHI-S) and Decayed, Missing, and Filled Teeth (DMFT) index. Saliva was taken for DNA extraction, followed by the 16S rRNA sequencing of V3-V4 hypervariable regions. The bioinformatics pipeline in QIIME2 was utilized for analyzing the comparison of microbial composition and diversity in groups of varying oral hygiene status and severity of caries. Metagenomic analysis revealed 3334 Amplicon Sequence Variants (ASVs), of which the most prevalent genera were Streptococcus, Haemophilus, Veillonella, Rothia, and Prevotella. High-oral-hygiene groups presented increased levels of cariogenic bacteria, while moderate-oral-hygiene groups presented an equilibrated microbiome. No statistically significant differences in microbial diversity were found between the study groups (p > 0.05). This study sheds light on the critical importance of oral hygiene in microbiome diversity in patients with beta-thalassemia major.
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Open AccessArticle
Risk Factors for Dengue Virus Infection Among Hospitalized Patients in Bangladesh
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Shirajum Monira, K. A. N. K. Karunarathna, Mohammad Ezazul Hoque Iqubal, Md Abu Sayeed, Tazrina Rahman, Md Kaisar Rahman, Shahneaz Ali Khan, Philip P. Mshelbwala, John I. Alawneh and Mohammad Mahmudul Hassan
Acta Microbiol. Hell. 2025, 70(3), 27; https://doi.org/10.3390/amh70030027 - 3 Jul 2025
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Dengue virus infection (DVI), a mosquito-borne arboviral infection, is prevalent in tropical and subtropical regions, including Bangladesh, where incidence has surged over the past three decades—particularly in urban and peri-urban areas. This study investigates the factors influencing DVI seropositivity among clinically suspected patients
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Dengue virus infection (DVI), a mosquito-borne arboviral infection, is prevalent in tropical and subtropical regions, including Bangladesh, where incidence has surged over the past three decades—particularly in urban and peri-urban areas. This study investigates the factors influencing DVI seropositivity among clinically suspected patients admitted to the selected hospitals of Savar, Dhaka, and Chattogram. Data were collected from 850 clinically suspected patients admitted to two hospitals in Savar, Dhaka, and two in Chattogram during 2019. Questionnaire responses and laboratory test results (NS1, IgM, and IgG) were analyzed using descriptive statistics, chi-square tests, and logistic regression. Out of 450 admissions in Savar, 330 tested positive, while Chattogram reported 145 positives from 400 cases. No significant differences were observed between regions in relation to hospital type, season, gender, or household preventive measures. In Savar, DVI status was significantly associated with season, mosquito net use, and patient contact. In Chattogram, household repellent use and patient contact were key factors. Diagnostic tests varied in detection capability. These findings can inform targeted intervention strategies and public health messaging, such as promoting personal protection measures and community awareness campaigns, particularly in high-incidence urban settings. However, further research across diverse geographic and socio-ecological contexts is needed to enhance the generalizability and policy relevance of these results.
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Open AccessArticle
High Prevalence of Vaginal Candidiasis and Absence of Trichomonas vaginalis Among Female Patients in Da Nang, Vietnam
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Vinh Xuan Le, Kieu Thi Nguyen, Minh Van Nguyen, Tram ThiHoang Ho, Tuyen ThiThanh Tran, Cong Phi Dang, Van Cao and Thuy Thi Le
Acta Microbiol. Hell. 2025, 70(3), 26; https://doi.org/10.3390/amh70030026 - 24 Jun 2025
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Vaginitis is a major health concern among women, with inadequate treatment potentially leading to reproductive complications. This study aimed to assess vaginitis prevalence, identify predominant pathogens, and evaluate associated risk factors among female patients at Da Nang Dermato-Venereology Hospital. A prospective study of
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Vaginitis is a major health concern among women, with inadequate treatment potentially leading to reproductive complications. This study aimed to assess vaginitis prevalence, identify predominant pathogens, and evaluate associated risk factors among female patients at Da Nang Dermato-Venereology Hospital. A prospective study of 796 female patients undergoing physical examinations was conducted, with demographic, clinical, and microbiological data collected. Vaginitis was diagnosed in 180 (22.6%) of 796 female patients, predominantly caused by Candida spp. (66.1%) and bacterial pathogens (31.7%), with no Trichomonas vaginalis detected, and was most prevalent in women aged 20–30 years. Poor hygiene practices, including infrequent sanitary pad changes (OR = 5.01, p < 0.001) and routine vaginal douching (OR = 6.77, p < 0.001), were significantly associated with vaginitis. The Amsel criteria showed high specificity (99.1%) for bacterial vaginosis diagnosis. The absence of T. vaginalis suggests a potential shift in the epidemiology of vaginal infections. The Amsel criteria are a practical diagnostic tool in resource-limited settings. Our findings highlight the need for targeted hygiene education to reduce vaginitis prevalence in Vietnam.
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Open AccessReview
Talaromyces marneffei Outside Endemic Regions: An Overlooked Mycosis Under a One-Health Lens
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Paulo Afonso, Luís Cardoso, Ana Sofia Soares, Manuela Matos, Hélder Quintas and Ana Cláudia Coelho
Acta Microbiol. Hell. 2025, 70(2), 25; https://doi.org/10.3390/amh70020025 - 16 Jun 2025
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Talaromyces marneffei is a zoonotic dimorphic pathogen endemic to Southeast Asia and reported in 33 countries, with an estimated 17,300 human cases and 4900 deaths annually. We aimed to identify the best available evidence regarding the epidemiological and clinical features and the prevalence
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Talaromyces marneffei is a zoonotic dimorphic pathogen endemic to Southeast Asia and reported in 33 countries, with an estimated 17,300 human cases and 4900 deaths annually. We aimed to identify the best available evidence regarding the epidemiological and clinical features and the prevalence of T. marneffei reported in companion animals, wildlife, and humans in Europe. A systematic literature review was conducted by searching three databases under PRISMA guidelines for “Talaromyces marneffei” or “talaromycosis” in Europe or the equivalent. References from the obtained publications were also checked to identify additional papers that met the inclusion criteria. The search was not limited by language or year. Studies published until 30 April 2025 were included. Due to the limited number of publications on animals, the geographic scope was expanded to a global level. Of the 915 studies identified, 33 were eligible and categorised according to the subject they addressed: talaromycosis in humans (n = 26), talaromycosis in companion animals (n = 4), and talaromycosis in wildlife (n = 3). Talaromycosis has been reported 28 times in 11 different European countries among humans. Additionally, one case of T. marneffei in wildlife has been documented in Europe. There is a potential liaison host between bamboo rats and humans. Talaromycosis is an emerging planetary neglected disease. Confusion with other diseases and potential misdiagnosis leads to delayed diagnosis and unnecessary risk to lives. Immunocompromised and HIV-positive patients should be screened for talaromycosis. The unexplained worldwide reports in atypical species and locations prompt a call to action for a more proactive search for T. marneffei in other domestic and wild animals, as well as in soil, to fully understand its hosts and transmission, which must incorporate the Stockholm Paradigm and Planetary Health perspectives.
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Open AccessArticle
Antibiotic Resistance Profiles of Diarrhoeagenic Enterobacterales in Bioko Island, Equatorial Guinea
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Úrsula-Eva Eñeso Efuá, Silvia Herrera-León, Fátima Patabobe, Pascual Erasmo Owono and Agustín Benito
Acta Microbiol. Hell. 2025, 70(2), 24; https://doi.org/10.3390/amh70020024 - 10 Jun 2025
Abstract
Acute diarrhoeal disease caused by antibiotic-resistant diarrhoeagenic bacteria is a significant global public health issue, particularly in low- and middle-income countries. This study provides the first molecular characterisation of antimicrobial resistance profiles, including the detection of CTX-M-15 and CTX-M-55 extended-spectrum beta-lactamases (ESBLs), among
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Acute diarrhoeal disease caused by antibiotic-resistant diarrhoeagenic bacteria is a significant global public health issue, particularly in low- and middle-income countries. This study provides the first molecular characterisation of antimicrobial resistance profiles, including the detection of CTX-M-15 and CTX-M-55 extended-spectrum beta-lactamases (ESBLs), among diarrhoeagenic Enterobacterales in Bioko Island, Equatorial Guinea, offering novel epidemiological insights into an understudied region. This study investigated the antibiotic resistance profiles of pathogenic bacteria isolated from diarrhoeal samples on Bioko Island. A total of 153 clinical isolates were collected between 1 February and 30 May 2014, and antimicrobial susceptibility testing was performed at Loeri Comba Polyclinic (Malabo) using the Kirby–Bauer method. The molecular characterisation of β-lactamase-associated genes was performed on different isolates of diarrhoeagenic pathotypes—144 Escherichia coli, 7 Salmonella enterica, and 2 Shigella flexneri—at the National Centre for Microbiology (Majadahonda, Spain). High resistance rates were detected against ampicillin (98%), tetracycline (93.5%), sulfonamides (94.8%), sulfamethoxazole–trimethoprim (88.2%), and cefotaxime (78.8%), while moderate rates of resistance were noted for ciprofloxacin (26.7%), and all isolates remained susceptible to imipenem. Of the isolates, 107 (69.9%) produced either single or multiple β-lactamases. Among these, 73 (68.2%) harbored classical β-lactamases, specifically TEM and OXA-1 types, representing 47.7% of the total sample. Additionally, 34 (31.8%) of the isolates were identified as producers of extended-spectrum β-lactamases (ESBLs), specifically CTX-M enzymes. Sequencing identified CTX-M-15 and CTX-M-55 variants. The predominant ESBL-producing bacteria were enteroaggregative Escherichia coli (56.2%), followed by enteropathogenic and enterotoxigenic E. coli. These findings confirm the circulation of multidrug-resistant diarrhoeagenic Enterobacterales in Equatorial Guinea, raising concerns about limited treatment options due to widespread resistance to multiple antibiotic classes, including third-generation cephalosporins and quinolones. The most important conclusion drawn from this study is that a high percentage of diarrhoeagenic bacteria have an antibiotic resistance and multi-resistance profile, especially to beta-lactams and other groups of antibiotics such as tetracyclines and sulphonamides. There is also a moderate prevalence of isolates carrying ESBLs on Bioko Island, Equatorial Guinea, which could indicate the inappropriate use of antimicrobials.
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Open AccessArticle
Sexually Transmitted Diseases and Their Associated Factors in a Cohort in Da Nang City: An Alarming Trend in Syphilis Rates and Infection at Young Ages
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Thuy Thi Le, Trinh ThiDoan Nguyen, Ngan DangThu Nguyen, Hoang Huy Nguyen, Hoa ThiMinh Hoang, Lam ThiKieu Bui, Minh Van Nguyen, Cong Phi Dang and Van Cao
Acta Microbiol. Hell. 2025, 70(2), 23; https://doi.org/10.3390/amh70020023 - 5 Jun 2025
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Sexually transmitted infections (STIs) remain a global issue, causing health problems and financial burdens. This study aimed to provide an update on the invasive pathogens and analyze any associated factors in patients visiting Da Nang Dermato-Venereology Hospital who were diagnosed with genital tract
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Sexually transmitted infections (STIs) remain a global issue, causing health problems and financial burdens. This study aimed to provide an update on the invasive pathogens and analyze any associated factors in patients visiting Da Nang Dermato-Venereology Hospital who were diagnosed with genital tract infections in males and lower genital tract infections in females; 535 participants underwent clinical examinations and microbiological tests to identify the invasive microorganisms, before we analyzed previously gathered laboratory results and associated risk factors. The rate of infection was 37.6% amongst 535 participants. Treponema pallidum infection accounted for the highest rate of 21.3%, followed by HSV, standing at 6%. The prevalence of syphilis infection was highest in the 20–29 age group, standing at 51.7%. There was a positive correlation between age under 20 and infected conditions (OR = 3.78, 95% CI: 1.41–10.11, p = 0.008). Having multiple sexual partners was identified as a risk factor for infection, as those with three or more sexual partners showed a high correlation (OR = 3.19, 95% CI: 1.44–7.05, p = 0.004). The high syphilis prevalence among young adults and teenagers underscores the need for improved STI education and screening programs in Vietnam.
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Open AccessArticle
Waste Collection and Viral Hepatitis: Assessing the Occupational Risk of HBV and HCV
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Lorenzo Ippoliti, Federica Crivaro, Luca Coppeta, Giuseppina Somma, Filippo Lecciso, Gianmarco Manili, Viola Giovinazzo, Margherita Iarossi, Cristiana Ferrari, Antonio Pietroiusti and Andrea Magrini
Acta Microbiol. Hell. 2025, 70(2), 22; https://doi.org/10.3390/amh70020022 - 4 Jun 2025
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Hepatitis B and C (HBV and HCV) infections persist as significant public health concerns. Specific occupational groups, such as waste collectors, continue to face elevated risk due to exposure to contaminated materials. Research studies have underscored heightened infection rates, notably from needle prick
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Hepatitis B and C (HBV and HCV) infections persist as significant public health concerns. Specific occupational groups, such as waste collectors, continue to face elevated risk due to exposure to contaminated materials. Research studies have underscored heightened infection rates, notably from needle prick injuries. The present study aspires to re-evaluate the prevalence of HBV and HCV among waste collectors and to scrutinize associated risk factors, thereby contributing to the development of effective public health and occupational safety strategies. The study analyzed data from 116 Italian waste collectors who were undergoing regular occupational visits, examining demographics, health conditions, HBV immunization, and annual blood tests for the HBsAg, HBsAb, and HCVAb. The HBsAb was detected in 66 individuals (56.9%), while the HCVAb was found in 4 (3.4%). Logistic regression showed HBV immunization and longer job experience to be significant factors associated with HBsAb presence. Waste collection may increase HBV infection risk due to occupational exposure, unlike HCV, which requires blood-to-blood contact. Preventive strategies, including education, protective equipment, and HBV vaccination, are essential. Ensuring vaccination coverage among waste collectors could reduce infection risk. Further research should assess the occupational risks and the effectiveness of preventive measures.
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Open AccessArticle
Functional Profiling of Antimicrobial Resistance in Rabbit Gut Microbiome
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Pitakthai Chamtim, Nachon Raethong and Roypim Thananusak
Acta Microbiol. Hell. 2025, 70(2), 21; https://doi.org/10.3390/amh70020021 - 27 May 2025
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Antimicrobial resistance (AMR) is a growing concern in laboratory animals, where antibiotic use can disrupt the gut microbiome and promote resistant strains. Rabbits, commonly used in biomedical research, are particularly susceptible to gut dysbiosis, increasing the risk of infection and subsequent antibiotic use.
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Antimicrobial resistance (AMR) is a growing concern in laboratory animals, where antibiotic use can disrupt the gut microbiome and promote resistant strains. Rabbits, commonly used in biomedical research, are particularly susceptible to gut dysbiosis, increasing the risk of infection and subsequent antibiotic use. This study used 16S rRNA amplicon sequencing and PICRUSt2 to predict resistance-related functions in rabbits under standard laboratory conditions. Among 2427 amplicon sequence variants, 42 functional classes were identified, with AMR comprising 1.55% of the predicted functions, including beta-lactam, vancomycin, and cationic antimicrobial peptide resistance. These AMR functions were associated with commensal genera such as Bacteroides and Ruminococcus, while no associations were observed with pathogens such as Escherichia or Salmonella. The study provides functional evidence of intrinsic AMR in the rabbit gut microbiome and underscores the importance of antimicrobial stewardship in laboratory animal research.
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Open AccessSystematic Review
Impact of Microbial Load on Operating Room Air Quality and Surgical Site Infections: A Systematic Review
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Sofia Chiletzari, Anastasia Barbouni and Konstantinos Kesanopoulos
Acta Microbiol. Hell. 2025, 70(2), 20; https://doi.org/10.3390/amh70020020 - 20 May 2025
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Surgical site infections (SSIs) are one of the most common causes of hospital-acquired infections worldwide, with significant clinical and economic implications. The aim of this review was to summarize the latest body of evidence on associations between microbial air load and SSIs. The
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Surgical site infections (SSIs) are one of the most common causes of hospital-acquired infections worldwide, with significant clinical and economic implications. The aim of this review was to summarize the latest body of evidence on associations between microbial air load and SSIs. The systematic review was conducted using the revised Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA, 2020) method. Pubmed and Scopus databases were searched for the period 2014–2024. English language articles were searched for their reports on the microbial burden of operating room air and its association with surgical site infections. The present review includes a total of 36 articles related to microbial air load as an aggravating factor to air quality in the operating room and its association with SSIs. A direct correlation between microbial air load and the occurrence of SSIs was established through sampling methods and genetic analysis. A lack of consensus on the effectiveness of laminar air flow (LAF) systems was underlined, while temperature-controlled air flow seemed a promising alternative. One study found that each additional person in the operating room increases the number of bacterial colonies by 4.93 CFU/m3 while another did not find significant changes in air quality. More than 20 air changes per hour (ACH) appeared to have better results in improving the quality of the air in the operation room. Airborne microbial contamination is multifactorial, and for some of those factors, a revision of the guidelines seems necessary. Artificial Intelligence (AI) and Next-Generation Sequencing methods show great promise for improving air quality in the future. This review calls for the implementation of international guidelines regarding air contamination limits in operating rooms and standardized air sampling methods, as well as further research for the efficacy assessment of air flow systems and emerging technologies based on AI in order to reduce the burden of SSIs and improve patient outcomes.
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Open AccessReview
Microbial Pathogens Linked to Vaginal Microbiome Dysbiosis and Therapeutic Tools for Their Treatment
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Alejandro Borrego-Ruiz and Juan J. Borrego
Acta Microbiol. Hell. 2025, 70(2), 19; https://doi.org/10.3390/amh70020019 - 19 May 2025
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The vaginal microbiome can be perturbed by various intrinsic and extrinsic factors, resulting in a state of dysbiosis that decreases the abundance of commensal lactobacilli and often leads to pathological conditions such as bacterial vaginosis, yeast infections, sexually transmitted infections, and other vaginal
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The vaginal microbiome can be perturbed by various intrinsic and extrinsic factors, resulting in a state of dysbiosis that decreases the abundance of commensal lactobacilli and often leads to pathological conditions such as bacterial vaginosis, yeast infections, sexually transmitted infections, and other vaginal disorders. This narrative review explores the molecular and pathophysiological mechanisms of several microbial diseases associated with the dysbiosis of the vaginal microbiome, as well as the efficacy of therapeutic tools for these conditions, such as antibiotic treatment and the use of live biotherapeutic products. A non-systematic, narrative approach was employed. Searches and data extraction were performed using the PubMed and Scopus databases between January and February 2025. All reviewed studies reported vaginal microbiome dysbiosis, with microbial pathogens inducing a specific immune response in the host. Current treatments for vaginal microbiota dysbiosis-related pathologies often result in high relapse and recurrence rates, suggesting microbial resistance and the need for alternative therapeutic strategies. In turn, live biotherapeutic products have demonstrated beneficial effects, restoring microbial balance in dysbiotic conditions. While these findings suggest promising potential for live biotherapeutic products, further rigorous clinical studies are necessary to gain a deeper understanding of the female genital tract ecosystem and to identify novel biomarkers along with their associated health implications. Moreover, the development of new diagnostic and management strategies will facilitate personalized therapeutic approaches. Ultimately, a comprehensive perspective on vaginal care is pivotal, taking into account both microbial and immune dynamics to enhance women’s health outcomes.
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Open AccessReview
Trace Metals in Modern Technology and Human Health: A Microbiota Perspective on Cobalt, Lithium, and Nickel
by
Jean Demarquoy
Acta Microbiol. Hell. 2025, 70(2), 18; https://doi.org/10.3390/amh70020018 - 2 May 2025
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The human microbiota plays a crucial role in maintaining host health through its considerable influence on immune function, nutrient metabolism, and overall homeostasis. While trace metals such as cobalt, lithium, and nickel are essential micronutrients at low concentrations, their increasing environmental accumulation presents
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The human microbiota plays a crucial role in maintaining host health through its considerable influence on immune function, nutrient metabolism, and overall homeostasis. While trace metals such as cobalt, lithium, and nickel are essential micronutrients at low concentrations, their increasing environmental accumulation presents emerging risks for microbial dysbiosis and related systemic health effects. This review examines the dual role of these trace metals as both beneficial nutrients and potential disruptors of microbial balance. Specifically, cobalt supports microbial diversity through its role in vitamin B12 synthesis, but excessive exposure can lead to dysbiosis. Lithium, beneficial at therapeutic concentrations by enhancing beneficial microbial populations, adversely affects gut barrier integrity by promoting inflammation and epithelial damage at higher concentrations. Similarly, nickel participates in essential enzymatic activities but promotes dysbiosis and inflammatory responses at elevated exposures. Furthermore, the growing environmental contamination by these metals poses risks to food systems and various microbial communities in the environment. Highlighting these environmental concerns, this review calls for sustainable management and multidisciplinary research to mitigate health risks to mitigate health risks associated with trace metal exposure.
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Open AccessCommunication
Molecular Characterization of Bacillus anthracis from Selected Districts of Bangladesh
by
Md. Maidul Islam, Md Ahosanul Haque Shahid and K. H. M. Nazmul Hussain Nazir
Acta Microbiol. Hell. 2025, 70(2), 17; https://doi.org/10.3390/amh70020017 - 30 Apr 2025
Cited by 1
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In developing countries like Bangladesh, livestock is one of the main sources of income. Among several infectious diseases, the Gram-positive bacterium Bacillus anthracis causes a zoonotic disease named anthrax. Animal anthrax outbreaks are a frequently occurring problem in Bangladesh. Our present study aims
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In developing countries like Bangladesh, livestock is one of the main sources of income. Among several infectious diseases, the Gram-positive bacterium Bacillus anthracis causes a zoonotic disease named anthrax. Animal anthrax outbreaks are a frequently occurring problem in Bangladesh. Our present study aims to molecularly identify and characterize B. anthracis from three districts of Bangladesh by 16S rRNA gene sequencing. B. anthracis was confirmed in soil, meat, and blood samples using PCR. Anthrax-affected soil (n = 128), blood (n = 1), and meat (n = 2) samples were analyzed using PCR. One of the positive samples was randomly chosen for sequencing, and MEGA5 software was used to generate the phylogenetic tree from the sequencing result. A total of 21 (16.40%) soil samples and all of the blood and meat samples were positive for the presence of bacteria, confirmed by PCR. The 16S rRNA gene of B. anthracis Sirajganj-1 was identical to that of other strains. To fulfill the Sustainable Development Goals, it is important to control zoonotic diseases. Our results may help discover the virulent genes of B. anthracis for future investigation and control this zoonotic disease. Also, a proper awareness of vaccination and effective surveillance system is important to eradicate any kind of zoonotic disease in developing nations.
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Open AccessArticle
Blood Parasite Diversity and Zoonotic Risk in Captive Sun-Tailed Monkeys from Gabon
by
Sarah Parfaite Ambourouet, Franck Mounioko, Patrice Makouloutou-Nzassi, Monique Nzale, Barthelemy Ngoubangoye and Larson Boundenga
Acta Microbiol. Hell. 2025, 70(2), 16; https://doi.org/10.3390/amh70020016 - 28 Apr 2025
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The present study investigates the prevalence and diversity of Plasmodium and Trypanosoma infections in Allochrocebus solatus, a vulnerable primate species native to Gabon. Using molecular techniques like nested PCR and phylogenetic analysis, we found 34.0% infection rate for malaria parasites infection, 21.3%
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The present study investigates the prevalence and diversity of Plasmodium and Trypanosoma infections in Allochrocebus solatus, a vulnerable primate species native to Gabon. Using molecular techniques like nested PCR and phylogenetic analysis, we found 34.0% infection rate for malaria parasites infection, 21.3% for Trypanosoma spp., and 12.8% co-infections. Additionally, Hepatocystis was exclusively detected among malaria parasites, while Trypanosoma brucei brucei, T. vivax, and T. congolense were identified. These results underscore the complex host–parasite interactions influenced by captivity and the ecological and immunological consequences of such infections, particularly the increased susceptibility associated with captivity-induced stress. This preliminary study highlights the need for ongoing surveillance to mitigate health risks in primates and prevent potential zoonotic spillovers, providing critical data for conservation efforts.
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Open AccessArticle
Device-Associated Infections in Adult Intensive Care Units: A Prospective Surveillance Study
by
Alkmena Kafazi, Eleni Apostolopoulou, Eymorfia Andreou, Alexandra Gavala, Evagelos Stefanidis, Fwteini Antwniadou, Christos Stylianou, Theodoros Katsoulas and Pavlos Myrianthefs
Acta Microbiol. Hell. 2025, 70(2), 15; https://doi.org/10.3390/amh70020015 - 27 Apr 2025
Abstract
Device-associated infections (DAIs) are a significant public health concern because of their attributable mortality, along with the extra length of stay and cost. This two- year prospective surveillance study aimed to assess the incidence of DAIs and their clinical impact on four Greek
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Device-associated infections (DAIs) are a significant public health concern because of their attributable mortality, along with the extra length of stay and cost. This two- year prospective surveillance study aimed to assess the incidence of DAIs and their clinical impact on four Greek adult medical-surgical Intensive Care Units (ICUs). Centers for Disease Control and Prevention (CDC) definitions were used to diagnose DAIs. Of the 500 patients hospitalized for 12,624 days, 254 (50.8%) experienced 346 episodes of DAIs. The incidence of DAIs was 27.4 episodes per 1000 bed-days. The incidence of ventilator-associated events (VAEs), central line-associated bloodstream infections (CLABSIs), and catheter-associated urinary tract infections (CAUTIs) was 20.5 episodes per 1000 ventilator-days, 8.6 episodes per 1000 central line-days, and 2.5 episodes per 1000 catheter-days, respectively. The most common pathogens isolated were Acinetobacter baumannii (35.7%) and Klebsiella pneumoniae (29.9%). All gram-negative pathogens were carbapenem-resistant. The ICU’s mortality was 44.9% for patients with DAIs and 24.8% for patients without a DAI (attributable mortality 20.1%, p < 0.001), while the mean ICU length of stay was 34.5 days for patients with DAIs and 15.6 days for patients without a DAI (attributable length of stay 18.9 days, p < 0.001). The high incidence of multidrug-resistant pathogens and the attributable length of stay and mortality of DAIs emphasize the need to establish an organized antimicrobial surveillance program and implement a care bundle for DAI prevention in ICUs with personnel educational training, monitoring, and feedback.
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Open AccessReview
Influence of Microbiome Interactions on Antibiotic Resistance Development in the ICU Environment: Insights and Opportunities with Machine Learning
by
Aikaterini Sakagianni, Christina Koufopoulou, Petros Koufopoulos, Georgios Feretzakis, Athanasios Anastasiou, Nikolaos Theodorakis and Pavlos Myrianthefs
Acta Microbiol. Hell. 2025, 70(2), 14; https://doi.org/10.3390/amh70020014 - 9 Apr 2025
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Antibiotic resistance is a global health crisis exacerbated by the misuse of antibiotics in healthcare, agriculture, and the environment. In an intensive care unit (ICU), where high antibiotic usage, invasive procedures, and immunocompromised patients converge, resistance risks are amplified, leading to multidrug-resistant organisms
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Antibiotic resistance is a global health crisis exacerbated by the misuse of antibiotics in healthcare, agriculture, and the environment. In an intensive care unit (ICU), where high antibiotic usage, invasive procedures, and immunocompromised patients converge, resistance risks are amplified, leading to multidrug-resistant organisms (MDROs) and poor patient outcomes. The human microbiome plays a crucial role in the development and dissemination of antibiotic resistance genes (ARGs) through mechanisms like horizontal gene transfer, biofilm formation, and quorum sensing. Disruptions to the microbiome balance, or dysbiosis, further exacerbate resistance, particularly in high-risk ICU environments. This study explores microbiome interactions and antibiotic resistance in the ICU, highlighting machine learning (ML) as a transformative tool. Machine learning algorithms analyze high-dimensional microbiome data, predict resistance patterns, and identify novel therapeutic targets. By integrating genomic, microbiome, and clinical data, these models support personalized treatment strategies and enhance infection control measures. The results demonstrate the potential of machine learning to improve antibiotic stewardship and predict patient outcomes, emphasizing its utility in ICU-specific interventions. In conclusion, addressing antibiotic resistance in the ICU requires a multidisciplinary approach combining advanced computational methods, microbiome research, and clinical expertise. Enhanced surveillance, targeted interventions, and global collaboration are essential to mitigate antibiotic resistance and improve patient care.
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