Search Results (190)

Zoonotic opportunistic enteric protozoa represent a significant global health threat to immunocompromised populations, especially individuals with human immunodeficiency virus (HIV). Despite China’s severe HIV burden, molecular epidemiological data on enteric protozoa remain limited in this population. In this study, we investigated the occurrence and molecular characteristics of Cryptosporidium species, Giardia duodenalis, and Enterocytozoon bieneusi among 150 AIDS patients with severe immunodeficiency in Wuhan city, Hubei Province, China. The overall test-positive rate was 5.33% (8/150), comprising Cryptosporidium species (including C. hominis, C. parvum, and C. meleagridis) in 2.00% (3/150) and G. duodenalis (including assemblage A, B, and E) in 3.33% (5/150); E. bieneusi was not detected. Notably, this study reports the first identification of the C. parvum subtype IIcA5G3 in humans in China, certainly indicating possible cross-border transmission. Furthermore, the detection of C. meleagridis IIIbA22G1R1c provided additional molecular evidence for chicken-to-human transmission. The finding of G. duodenalis assemblage E highlights the underrecognized zoonotic spillover risks to immunocompromised populations. These findings emphasize the diversity of infectious reservoirs, and the need for enhanced national molecular surveillance of these neglected zoonotic enteric protozoa, alongside targeted interventions for vulnerable populations. Full article

Background: Staphylococcus spp. represent the most prevalent Gram-positive organisms in children with malignancies or undergoing haematopoietic cell transplantation (HCT), contributing to significant morbidity and mortality. This study aimed to assess the epidemiology, risk factors, treatment strategies, and outcomes of staphylococcal infections (SIs) in paediatric haemato-oncology (PHO) and HCT patients in Poland over a 12-year period. Methods: A retrospective, multicentre study was conducted across 17 paediatric oncology centres in Poland. The clinical and microbiological data of patients under the age of 18, diagnosed with malignancies or post-HCT, were analysed for confirmed SI between 2012 and 2023. The variables assessed included demographics, underlying conditions, infection type and source, antimicrobial susceptibility, treatment, and 30-day infection-free survival. Results: Among 1725 patients with SI, 1433 were PHO and 292 were HCT patients. The cumulative incidence of SI was 12.7% in PHO and 14.3% in HCT patients (p = 0.008). The 30-day survival rate was significantly higher in PHO compared to HCT patients (98.4% vs. 93.2%, p < 0.001). Most deaths were caused by S. epidermidis, S. haemolyticus, and S. hominis, predominantly involving methicillin-resistant coagulase-negative Staphylococci (MRCNS). Multivariate Cox regression identified undergoing HCT (HR = 3.0, 95% CI: 1.6–5.6, p < 0.001) and treatment of infection > 10 days (HR = 2.0, 95% CI: 1.1–3.6, p = 0.019) as independent risk factors for mortality. Conclusions: Staphylococcal infections pose a significant challenge in paediatric oncology and transplant populations. Optimising prevention, diagnostics, and antimicrobial therapy is crucial for improving outcomes in these high-risk groups. Full article

Background/Objectives: Mycoplasma and Ureaplasma species are pathogens commonly associated with urogenital infections in sexually active individuals. Despite their clinical relevance, these organisms are less frequently studied than other sexually transmitted infections (STIs), leading to limited data on their antimicrobial susceptibility and resistance profiles. This study aimed to characterize the antimicrobial susceptibility and resistance patterns of Mycoplasma hominis and Ureaplasma spp. among individuals in Salvador, Bahia, Brazil, and to identify the potential associated risk factors. Methods: We conducted a retrospective descriptive study during 2022–2024 using secondary data obtained from the SMARTLab^® diagnostic system. Sociodemographic and epidemiological data, along with results from IST2 and IST3 diagnostic tests, were analyzed. Absolute and relative frequencies were calculated by sex, age group, and antimicrobial susceptibility profile. Results: Our results revealed a predominance of M. hominis and Ureaplasma spp. infection among women (98.5%), and in individuals aged 38 to 47 years. Ureaplasma spp. accounted for the majority of positive cases. High rates of resistance were observed in the IST2 test, with 75.0% of M. hominis and 84.1% of Ureaplasma urealyticum resistant to ciprofloxacin. In the IST3 test, Ureaplasma spp. demonstrated a 7.3% resistance rate to levofloxacin, which increased to 22.2% in cases of co-infection. Conclusions: These findings underscore the growing threat of antimicrobial resistance in Mycoplasma and Ureaplasma species and highlight the need for targeted public health strategies and diagnostic tools to manage infections caused by these organisms, particularly in high-risk populations. Full article

Many studies have focused on ageing and gut microbiota, but the correlation between gut microbiota and physical function in older adults, especially those with longevity, remains obscure and deserves further exploration. In this study we investigated changes in the gut microbiota and the association between gut microbiota and physical function in adults with longevity. This is a prospective observational study. Fifty-one older adults aged ≥ 60 years (including 27 participants aged 90 years and above) were enrolled. Information on clinical data, physical function including intrinsic capacity by Integrated Care for Older People (ICOPE) tool, and dietary habits of participants was collected and analysed. Gut microbiota structure and functional pathways were analysed by Metagenomics. Intrinsic capacity (measured as ICOPE scores) of adults’ longevity (aged 90–98, longe group) was significantly lower than older adults aged 60–89 years (CON group) (5.44 ± 2.15 vs. 6.71 ± 1.46, p = 0.017). Gut microbiota of the longe group is enriched in Akkermansia and Bifidobacterium, which may be beneficial to health. Gut microbiota was closely related to daily milk (including plain milk, flavoured milk with a content of cow’s milk or reconstituted milk of ≥80%, or reconstituted milk or fermented milk with a content of cow’s milk or milk powder of ≥80%) consumption, anxiety, and physical function including grip strength by the Short Physical Performance Battery (SPPB). Bacteroides plebeius and Bacteroides eggerthii were increased in long-living adults with better physical function. Escherichia coli was more abundant in frail young-old adults. Grip strength is positively correlated with the abundance of Roseburia hominis, Eubacterium rectale, Eubacterium eligens, and Roseburia intestinalis (p < 0.05). Pathways related to amino acid synthesis that include L-isoleucine, L-valine, and L-threonine were over-presented in long-living adults of better physical function. Adults with longevity showed comparable gut microbiota abundance to younger elderly individuals. The gut microbiota of long-living adults showed higher abundance of potentially beneficial bacteria, and the altered bacteria are closely associated with physical function. Changes in the gut microbiota may precede clinical indicators during the process of ageing. Gut microbiota may be a potential biomarker for longevity and healthy ageing. Nutrition and emotional state can be important influencing factors. Full article

Urease-positive urogenital mycoplasmas are considered to be responsible for the formation of urinary stones. They are usually a part of the normal flora in the human urogenital tract, causing asymptomatic infections. However, many symptomatic infections with these bacteria have been reported. M. genitalium is recognized as a cause of male urethritis and other common genitourinary diseases. The role of other urogenital mycoplasmas is still unclear. The aim of this study was to estimate the quantitative prevalence of Ureaplasma spp., M. genitalium and M. hominis in men with urolithiasis using quantitative real-time PCR (qPCR). The study group comprised 100 men with urolithiasis. A total of 60 men were included in the control group. Urogenital mycoplasma DNA in urine samples was detected significantly more often among men with urolithiasis than in healthy subjects—43.0% vs. 26.6%, p = 0.0382, respectively. The majority of positive results (38/43) concerned U. parvum species, the frequency of which was higher in the study group (38.0% (38/100)) than in the control group (23.3% (14/60)), p = 0.0552. The median concentration of U. urealyticum DNA was higher in the study group compared with the control, p = 0.5714. However, further studies are needed to confirm the usefulness of quantitative studies in determining the role of urogenital mycoplasmas in pathology. Full article

The COVID-19 pandemic prompted widespread adoption of intensified hand hygiene practices, raising concerns about their medium-term impact on the skin microbiome. This study investigates alterations in the hand microbiome of healthy adults during the pandemic compared to pre-pandemic periods in Majorca, Spain. A total of 30 volunteers (16 women, 14 men; mean age 44.1 ± 8.8 years) were sampled between 2014 and 2021. Palm swabs were collected following WHO guidelines, alongside measurements of skin pH, temperature, and handwashing frequency. Bacterial DNA was extracted and analyzed via 16S rRNA (V3-V4) metagenomic sequencing to assess microbial diversity and composition. Results revealed a significant decline in microbial diversity during the COVID-19 period, accompanied by a marked shift in the community structure. The Firmicutes phylum dominated, with Bacillales increasing from 30.7% to 84.1%, primarily driven by a surge in Staphylococcus species (e.g., S. pasteuri). Conversely, S. hominis and Actinomycetales nearly disappeared. No significant associations were observed with gender or handwashing frequency. The skin temperature increased during the pandemic, while the pH remained stable. The Staphylococcus/Bacillus ratio shifted significantly, favoring Staphylococcus dominance. These findings, derived from a geographically limited population in Majorca, Spain, demonstrate that stringent hygiene measures during COVID-19 reduced microbial diversity and restructured hand microbiome composition. The study underscores the necessity for balanced hygiene strategies that mitigate pathogen transmission while preserving beneficial microbial communities critical to skin health. Full article

Background/Objectives: Polycystic ovary syndrome (PCOS) is one of the most frequently diagnosed endocrine and metabolic disorders in women of reproductive age before menopause. It is associated with excess androgens and ovarian dysfunction, reduced fertility, the presence of obstetric disorders, but also metabolic disorders, and, among others, insulin resistance, obesity and type II diabetes. Its close relationship with changes in the diversity of the vaginal microbiome, vaginal inflammation and changes in the vaginal microenvironment, which can pave the way for pathogenic microorganisms, is emphasized. Methods: The research in the presented paper focuses on a group of women with PCOS (n = 490) of reproductive age (26–43 years), in whom the frequency of infections of the reproductive system caused by atypical pathogens, Chlamydia trachomatis, Mycoplasma hominis and Ureaplasma spp., were analyzed, and then the immune system response was assessed in terms of the level of serum proinflammatory cytokines, IL-1β, IL-6 and TNF-α. Results: Our results showed a 40% infection rate in the studied group of patients with PCOS, with C. trachomatis being the most common pathogen (17.7%), followed by Ureaplasma spp. (10%) and M. hominis (4.9%). In some cases, co-infections such as Mycoplasma and Ureaplasma were also observed in 3.1% or all three atypical bacteria, M. hominis, Ureaplasma spp. and C. trachomatis, in 4.3% of patients with PCOS. In our study, in women with PCOS and confirmed infection with any atypical pathogen (n = 196), we analyzed the levels of proinflammatory cytokines, IL-1 β a, IL-6 and TNF-α. The results were compared with a control group (control group A) consisting of patients with the same underlying disease, i.e., PCOS (n = 39), who did not experience infection with atypical pathogens or symptoms of gynecological infection. Additionally, a control group B (n = 28) consisting of healthy women (without PCOS and without infection) was introduced. The results regarding the levels of cytokines studied in this work (IL-1β, IL-6, TNF-α) may suggest that the presence of intracellular C. trachomatis in the infection will play a dominant role in the immune system response. In the infections with atypical pathogens analyzed in this study in patients with PCOS, no characteristic clinical features were observed, apart from indications in the form of an increase in the number of leukocytes in the assessment of the vaginal biocenosis, suggesting cervicitis and reported reproductive failure or lower abdominal pain. An additional problem is the inability to detect the presence of atypical pathogens in routine microbiological tests; therefore, confirmation of such etiology requires referral of the patient for targeted tests. Conclusions: Invasion of host cells by atypical pathogens such as C. trachomatis and infections with “genital mycoplasmas” can disrupt the function of these cells and lead to many complications, including infertility. The immune response with the production of proinflammatory cytokines such as TNF-α, IL-1β, and IL-6, observed in response to infection with C. trachomatis, M. hominis, and Ureaplasma spp., induces or amplifies inflammation by activating immune cells or controlling infection, but may lead to the facilitation of the survival of pathogenic microorganisms and irreversible damage to fallopian tube tissues. Especially in the case of the proinflammatory cytosine TNF-α, there seems to be a close correlation with infections with atypical pathogens and a marked immune response, as well as with increased IL-1β and IL-6 values compared with the absence of infection (both in the presence and absence of PCOS). The presented study may suggest the importance of extended diagnostics to include atypical pathogens in the case of PCOS and the importance of research in this area also from the point of view of the immune response. Full article

Several trichomonad species have already been reported from cattle, including Tetratrichomonas buttreyi and Pentatrichomonas hominis. However, there is currently a lack of information concerning the prevalence of trichomonad species in cattle in Shanxi Province, North China. In this study, 761 fecal samples from cattle across three counties in Shanxi Province, namely Qi, Jishan, and Shanyin, were examined for the presence of T. buttreyi and P. hominis DNA through a nested PCR assay targeting a specific segment of the small subunit ribosomal RNA (SSU rRNA) gene. The results showed that the total prevalence of T. buttreyi in cattle was found to be 74.5%, with region and sex identified as risk factors for infection. P. hominis exhibited an overall prevalence of 3.0%, with strong associations observed between infection and both region and age. Sequencing analysis indicated that some T. buttreyi isolates and all P. hominis isolates were identical to those reported previously based on the analysis of SSU rRNA sequences, while certain T. buttreyi isolates exhibited minor allelic variations. These results enhance our understanding of the geographical distribution and genetic characterization of T. buttreyi and P. hominis in cattle. Full article

Introduction: Vaginal microbiota has emerged as an important factor influencing human papillomavirus (HPV) persistence and host immunity. While HPV infection is often transient, persistent infections with high-risk HPV genotypes significantly increase the risk of cervical carcinogenesis. Thus, this study aims to investigate the association between microflora/sexually transmitted infections (STIs) and HPV infection, with a focus on the prevalence of coinfection and the potential role of genital tract microecological disorders. Methods: A prospective cohort study was conducted at a tertiary care center in Astana, Kazakhstan, between November 2024 and March 2025. A total of 396 non-pregnant women aged 18–45 years were enrolled during routine gynecological screening. Cervical samples were collected for high-risk HPV genotyping and the detection of 11 other vaginal microorganisms using real-time PCR. Results: HPV-positive women were significantly younger and more likely to be single compared to HPV-negative participants. They also had fewer pregnancies and deliveries and were more likely to use barrier contraception. Among STIs, Mycoplasma hominis demonstrated a significant association with HPV infection (adjusted OR = 2.16, 95% CI: 1.15–4.05, p = 0.017). Overall STI presence (adjusted OR = 2.16, p = 0.017) and STI multiplicity (adjusted OR = 1.36 per additional STI, p = 0.017) were also significantly associated with HPV positivity. Correlation analysis revealed a moderate association between Chlamydia trachomatis and Trichomonas vaginalis (ϕ = 0.39, p < 0.001), suggesting shared ecological or transmission pathways. Conclusion: The findings highlight the relevance of specific vaginal pathogens, particularly Mycoplasma hominis, and co-infection patterns in increasing the risk of HPV infection. These results underscore the importance of comprehensive STI screening and microbial profiling in cervical cancer prevention strategies, especially in populations with limited access to HPV vaccination. Further longitudinal and mechanistic studies are warranted to elucidate causal pathways and progression to cervical neoplasia. Full article

The objective of this study was to determine the epidemiological, clinical, and laboratory characteristics of newborns with sepsis in northwestern Mexico, identify the microorganisms causing early- and late-onset sepsis, and assess antimicrobial resistance. Additionally, it sought to associate neonatal characteristics with antimicrobial resistance or mortality. A retrospective study was conducted from August 2021 to April 2023, during which 8382 neonatal clinical records were analyzed to collect epidemiological, clinical, and laboratory characteristics, as well as microorganisms isolated from neonates and their antimicrobial resistance profiles. Of these, 314 neonates with sepsis were included. The incidence of neonatal sepsis was 4% (314/8382), and the mortality was 12.7% (40/314); late-onset sepsis (65.3%) was more frequent than early-onset sepsis (34.7%). Staphylococcus epidermidis was the most frequently isolated bacterium in neonates with sepsis (both early- and late-onset). Gram-positive bacteria, such as Staphylococcus hominis and Enterococcus faecium, were associated with early-onset sepsis, whereas fungi, particularly Candida albicans, were associated with late-onset sepsis. Of the microorganisms, 52.6% were multidrug resistant (MDR), 10.8% were extensively drug resistant (XDR), and 5.5% were pan-drug resistant (PDR). Low birth weight, prematurity, cesarean section, mechanical ventilation, tachycardia, and low hemoglobin and platelet levels, among others, were associated with XDR or MDR microorganisms. In contrast, low birth weight, mechanical ventilation, stroke, unexpected delivery, respiratory distress, tachycardia, convulsive crisis, high procalcitonin, urea, and AST/TGO levels, among others, were associated with mortality. The incidence, types of sepsis, antimicrobial resistance, and associations identified in this study will aid in diagnosing neonatal sepsis earlier and may reduce mortality in our region. Full article

Trichomonas vaginalis causes one of the most prevalent sexually transmitted infections (STIs). Despite extensive biomolecular research on this protozoan, no efficient molecular tool currently exists for the intraspecific classification of T. vaginalis isolates. In recent years, an incipient tendency has been observed to classify this parasite into two genotypes that correlate in a high percentage with phenotypic characteristics (such as metronidazole resistance and viral endobionts). However, this grouping method has not yet been consolidated by the scientific community. In this sense, Mycoplasma hominis has also been identified as an endobiont of T. vaginalis, but no previous studies on its presence and possible correlation with the two T. vaginalis populations detected have been executed. In the present study, several new T. vaginalis isolates of Spanish origin have been characterized using two molecular markers (microsatellites and single-copy genes), the presence of T. vaginalis virus (TVV) and Mycoplasma, and the resistance to reference drugs. On the basis of our molecular results, the isolates were classified into two groups, as proposed by other researchers. In relation to the biological determinations, the two isolates harboring Mycoplasma were sensible to the reference drugs and were included in the same genotypic group. Although the presence of TVV was more notable in one group than in the other, both groups had TTV+ and TVV− isolates. These findings indicate that genetic grouping does not strongly correlate with susceptibility to reference drugs or endobiont presence, suggesting the need for further research into alternative classification models. Full article

In recent decades, the keeping of exotic animals has gained popularity among enthusiasts worldwide. However, alongside the development of exotic animal husbandry, issues related to health status and adequate veterinary care are coming to the forefront. The introduction of new snakes into a collection and shared enclosures should always be preceded by an assessment of their parasitic status. In our study, we present an overview of the screening for the presence of Cryptosporidium spp. in individuals captured in regions of Indonesia and Suriname, intended for further trade. Out of 40 tested fecal samples, the presence of cryptosporidial oocysts was confirmed in 6 samples. Detection was performed by molecular methods, namely Nested PCR targeting the GP60 gene region (60 kDa glycoprotein). By sequencing, we confirmed the presence of C. parvum in Oligodon octolineatus (n = 1) and Trimeresurus insularis (n = 1), C. tyzzeri in Corallus spp. (n = 2), and C. hominis in Boiga dendrophila spp. gemmicincta (n = 2), which is the very first time that this species has been detected in snakes in captivity. Although the presence of Cryptosporidium species, typical for snakes, was not detected, the identified species may pose a health risk to humans, especially workers who come into direct contact with animals. Full article

Background: Compared to soybean oil intravenous fat emulsion (SO-IFE), use of mixed-oil IFE (MO-IFE) is associated with reduced rates of catheter-related bloodstream infections caused by coagulase-negative Staphylococcus species (CoNS) in pediatric patients receiving parenteral nutrition. Methods: Using an in vitro biofilm model, this study aimed to assess the impact of IFEs on biofilm formation among Staphylococcus species. S. aureus, S. capitis, S. epidermidis, S. haemolyticus, S. hominis, and S. lugdunensis were cultivated as biofilms in media supplemented with SO-IFE, MO-IFE, or fish oil IFE (IFE). Biomass was quantified by the crystal violet method, and follow-up planktonic growth assays assessed antimicrobial effects of IFEs. Results: Compared to SO-IFE, MO-IFE and FO-IFE significantly inhibited biofilm formation of S. aureus but did not impact planktonic growth. Contrary to clinical data, CoNS biofilm formation was not impacted by any of the IFEs tested. S. aureus biofilm inhibition in IFEs was further investigated by comparing differences following growth in SO-IFE supplemented with capric acid, docosahexaenoic acid (DHA), or eicosapenaenoic acid (EPA) to concentrations matching those of MO-IFE. Capric acid supplementation was associated with significant reduction in biofilm formation compared to SO-IFE alone. However, this was attributed to a bactericidal effect based on follow-up planktonic growth assays. Conclusions: These results suggest that biofilm formation in S. aureus is variably impacted by fatty acid composition in clinically relevant IFEs, with capric acid exhibiting bactericidal activity against tested isolates. Full article

Background and Clinical Significance: Men who engage in anal fisting may experience full rectal and colon thickness injury resulting in an endoscopic emergency. The endoscopist does not routinely question patients about their sexual habits, nor are patients compliant with counseling during the endoscopy procedure as indicated by the infectious disease clinician. Case Presentation: A 47-years-old HIV- and monkeypox virus (MPXV)-negative Caucasian gay man underwent colonoscopy because of changes in bowel habits with anal discomfort and rectal bleeding. The first colonoscopy showed a vegetative annular neoformation of the anal canal. There was a concentric stenosis of the lumen. The endoscopist suspected the diagnosis of anal squamous cell carcinoma and a histopathology investigation was requested. Biopsy histology excluded a frank neoplasm or anal intraepithelial neoplasia (AIN). Then, the patient was referred to a multidisciplinary team. With adequate counseling, the patient disclosed his habitual anal fisting. Laboratory identification of L1–L3 Chlamydia trachomatis (CT) genovars was positive for CT L1, L2, real-time PCR for Neisseria gonorrhoeae (NG), and Mycoplasma hominis. Human Papillomavirus (HPV)-DNA detection identified HPV type 70, 68, and 61. We illustrate this case with plenty of histology and immunohistochemistry. We also review the differential diagnosis of AIN according to the 5th edition (2019) WHO Classification of Digestive System Tumours. Conclusions: Our patient emphasizes two important aspects of endoscopy and pathology: first, the significance of understanding patients’ sexual behaviors in diagnosing rectal and colon injuries, as well as the need for sexually transmitted infections (STI) screening especially for CT; and second, the effectiveness of a multidisciplinary communication model that encourages private discussions to alleviate patients’ fears and improve prevention efforts. Full article

The general female population is not considered a high-risk group for screening for sexually transmitted infections (STIs). This retrospective study describes the prevalence of Human Immunodeficiency Virus (HIV), Treponema pallidum (T. pallidum), Chlamydia trachomatis (C. trachomatis), Neisseria gonorrhoeae (N. gonorrhoeae), Trichomonas vaginalis (T. vaginalis), Mycoplasma spp., Ureaplasma spp., genital Herpes simplex virus (HSV), Monkeypox (mpox), Hepatitis B virus (HBV), and Hepatitis C virus (HCV) infections in asymptomatic and symptomatic cisgender women attending our walk-in STI clinic for the first time. Furthermore, it analyzes the number of individuals who returned for follow-up and were diagnosed with new STIs. Over 20 months, 189 women with a median age of 28.4 years were screened [129 (68.3%) asymptomatic and 60 (31.8%) symptomatic]. In order of prevalence, the most common STIs were: Ureaplasma spp. infections (50.3%), C. trachomatis (10.6%), N. gonorrhoeae (5.8%), Mycoplasma hominis infections (5.8%), T. pallidum (2.65%), HSV2 infections (2.65%), and mpox (0.53%). No diagnosis of HIV, trichomoniasis, HBV, or HCV was registered. After the initial evaluation, 128 (67.7%) women returned for follow-up, but only 43 (22.8%) repeated screening; among them, 11 (25.6%) were diagnosed with new STIs. Given the high prevalence of STIs in cisgender women, awareness measures to improve screening and prevention strategies in this neglected population are required. Full article