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GERMS is published by MDPI from Volume 15 Issue 4 (2025). Previous articles were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence, and they are hosted by MDPI on mdpi.com as a courtesy and upon agreement with the former publisher Infection Science Forum.

GERMS, Volume 14, Issue 2 (06 2024) – 9 articles , Pages 126-215

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Case Report
Aggregatibacter actinomycetemcomitans Endocarditis in an Adult Patient with Patent Ductus Arteriosus
by Alina Maria Borcan, Mihaela Cristina Olariu, Elena Liliana Costea, Georgiana Radu and Mădălina Simoiu
GERMS 2024, 14(2), 210-215; https://doi.org/10.18683/germs.2024.1433 - 30 Jun 2024
Viewed by 51
Abstract
Introduction: Aggregatibacter (Actinobacillus) actinomycetemcomitans is a commensal bacterial pathogen in the human oral cavity. It can, however, represent the source of local or systemic infections with serious evolution, in particular infective endocarditis. We present a particular case of an adult male [...] Read more.
Introduction: Aggregatibacter (Actinobacillus) actinomycetemcomitans is a commensal bacterial pathogen in the human oral cavity. It can, however, represent the source of local or systemic infections with serious evolution, in particular infective endocarditis. We present a particular case of an adult male patient with infective endocarditis with A. actinomycetemcomitans and patent ductus arteriosus (PDA). Case report: A 37-year-old patient, chronic ethanol user, is hospitalized for altered general condition, persistent cough, left chest pain, headache and dizziness, symptoms evolving for about 3 weeks. The clinical examination revealed crackling pulmonary rales present basally bilaterally, as well as numerous cavities and dental abscesses. Chest radiography showed mixed left hiliobasal pneumonia. Chest CT depicted pulmonary abscess and two filling defects in the pulmonary artery trunk, possible thrombotic/vegetative images/mediastinal thrombotic/adenopathic images. Broad spectrum antibiotic treatment was initiated. Transthoracic ultrasonography visualized persistence of ductus arteriosus and an echodense formation attached to the lateral wall of the pulmonary artery trunk. Following positive blood cultures for Aggregatibacter actinomycetemcomitans, the diagnosis of infective endocarditis was established and antibiotic treatment was de-escalated to ceftriaxone according to the antibiogram. The clinical course under treatment was slowly favorable, the patient was discharged on request on day 44 with continued treatment at home. Conclusions: Infective endocarditis caused by Aggregatibacter actinomycetemcomitans should be considered in patients with altered general condition and congenital cardiovascular defects. In the present case, the patient presented two risk factors, namely poor dental hygiene and PDA. Full article
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Case Report
Rare Fatal Case of Purpura Fulminans Due to Pneumococcal Sepsis in a Child, Associated with Multiorgan Failure
by Gheorghiţă Jugulete, Maria Mădălina Merişescu, Carmen Pavelescu and Monica Luminiţa Luminos
GERMS 2024, 14(2), 204-209; https://doi.org/10.18683/germs.2024.1432 - 30 Jun 2024
Cited by 1 | Viewed by 61
Abstract
Introduction: Streptococcus pneumoniae is one of the associated bacteria that can cause the rare but high mortality hematological pathology known as purpura fulminans (PF) in both adults and children. Pediatric patients with PF can progress quickly to sepsis and multiorgan failure, especially immunocompromised [...] Read more.
Introduction: Streptococcus pneumoniae is one of the associated bacteria that can cause the rare but high mortality hematological pathology known as purpura fulminans (PF) in both adults and children. Pediatric patients with PF can progress quickly to sepsis and multiorgan failure, especially immunocompromised individuals and young children. Due to the thrombotic blockage of blood arteries in PF, there is diffuse intravascular thrombosis and hemorrhagic infarction of the skin, which evolves from ecchymosis to skin necrosis, risk of limb sequelae, sepsis and fatality. Case report: We present a case of a previously healthy 1-year and 9-months old female who was admitted to the Intensive Care Unit of the National Institute of Infectious Diseases "Prof. Dr. Matei Balş"- Bucharest, Romania. On physical examination, she was febrile, hypotensive, tachycardic, and had erythematous patches on her left upper limb and trunk. Initial blood work was significant for creatinine 4.45 mg/dL, aspartate aminotransferase 112 U/L, alanine aminotransferase 130 U/L and fibrinogen 596 mg/dL. Hematological workup showed a white blood cells count of 34 × 109/L, hemoglobin 9.7 g/dL, platelets 23,000/L, D-dimers 89,000 μg/L, and elevated PT and aPTT. Broad-spectrum antibiotics vancomycin and ceftriaxone were administrated. A lumbar puncture was performed for cerebrospinal fluid (CSF) analysis and culture grew Streptococcus pneumoniae serotype 1A. She required peritoneal dialysis due to acute kidney injury (AKI) and surgeries for affected skin areas. After multiple organ system failures, our patient evolved rapidly to irreversible tissue necrosis and death. Conclusions: We aim to report a rare case of PF associated with pneumococcal meningoencephalitis in an immunocompetent child, to better appreciate the risk of fatal evolution when managing this disease in children. Full article
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Case Report
Clinical Spectrum of Extrapulmonary Non-Tuberculous Mycobacterial Disease in Immunocompetent Patients: A Case Series
by Prakrati Yadav, Durga Shankar Meena, Deepak Kumar, Nikhil John, Navneet Kaur, Sarika Kombade, Gopal Krishana Bohra, Sarvesh Tiwari and Vijaylaxmi Nag
GERMS 2024, 14(2), 197-203; https://doi.org/10.18683/germs.2024.1431 - 30 Jun 2024
Cited by 1 | Viewed by 36
Abstract
Introduction: Non-tuberculous mycobacterial (NTM) disease is an underdiagnosed condition that usually manifests as pulmonary infection. Extrapulmonary manifestations are rare and can be easily overlooked or misdiagnosed as tuberculosis or malignancy. Case report: Herein, we present four cases of extrapulmonary NTM disease in immunocompetent [...] Read more.
Introduction: Non-tuberculous mycobacterial (NTM) disease is an underdiagnosed condition that usually manifests as pulmonary infection. Extrapulmonary manifestations are rare and can be easily overlooked or misdiagnosed as tuberculosis or malignancy. Case report: Herein, we present four cases of extrapulmonary NTM disease in immunocompetent patients. Patient 1 had bone marrow suppression secondary to NTM infection. Patient 2 was diagnosed with Mycobacterium abscessus meningitis, brain abscess and arachnoiditis. Patient 3 had pleural effusion, and fluid cytology revealed Mycobacterium fortuitum. Patient 4 was a 30-year-old male with cervical lymphadenopathy due to NTM. Two patients (case 2 and case 4) were initially diagnosed with tuberculosis but showed no response to anti-tubercular drugs. One patient (case 3) died within seven days of initiation of treatment. The rest of the patients (cases 1 and 2) showed clinical improvement with antimicrobial therapy for NTM species. Case 4 responded well to surgical excision without the need for antibiotics. Conclusions: Clinicians should be vigilant about the possibility of NTM disease. Early diagnosis is vital to prevent poor outcomes, particularly in the setting of disseminated infections. Full article
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Review
The Spectrum of Esophagitis in Patients Living with HIV—A Scoping Review
by Mihaela Cristina Olariu, Mihai Hristu Olariu, Adela Mihaela Iancu, Oana Săndulescu, Anca Streinu-Cercel, Ecaterina Constanţa Barbu, Gülşen Özkaya Şahin, Alina Maria Borcan, Miruna Maria Cruceru, Mădălina Simoiu and on behalf of ESCMID Study Group for Viral Hepatitis (ESGVH)
GERMS 2024, 14(2), 188-196; https://doi.org/10.18683/germs.2024.1430 - 30 Jun 2024
Cited by 1 | Viewed by 36
Abstract
Esophageal lesions are common findings in disorders of the digestive tract in patients living with HIV, the most typical symptoms being odynophagia and/or dysphagia. This article provides a narrative review of the spectrum of esophagitis in patients living with HIV, focusing on fungal, [...] Read more.
Esophageal lesions are common findings in disorders of the digestive tract in patients living with HIV, the most typical symptoms being odynophagia and/or dysphagia. This article provides a narrative review of the spectrum of esophagitis in patients living with HIV, focusing on fungal, viral, bacterial and non-infectious etiologies, as well as co-infections with viral hepatitis viruses. The article provides a comprehensive approach to the strategy of diagnosis and the role of upper digestive endoscopy and histopathological examination in the evaluation of esophageal pathology in patients living with HIV. Full article
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Review
The Emerging Role of Pseudomonas aeruginosa in Diarrhea: Where We Stand
by Mansoor Khaledi, Ahdiyeh Saghabashi and Hossein Ghahramanpour
GERMS 2024, 14(2), 179-188; https://doi.org/10.18683/germs.2024.1429 - 30 Jun 2024
Cited by 1 | Viewed by 38
Abstract
Although Pseudomonas aeruginosa (PA) hasn’t been considered as a recognized agent of diarrhea, this organism is able to cause community-acquired diarrhea accompanied by fever and sepsis, as well as antibiotic-associated diarrhea (AAD). Antibiotic resistance rates in stool isolates of PA are generally lower [...] Read more.
Although Pseudomonas aeruginosa (PA) hasn’t been considered as a recognized agent of diarrhea, this organism is able to cause community-acquired diarrhea accompanied by fever and sepsis, as well as antibiotic-associated diarrhea (AAD). Antibiotic resistance rates in stool isolates of PA are generally lower compared to other infection sites, but in patients with AAD, there are reports of resistance to most of the antibiotic classes in these isolates. PA, along with other opportunistic pathogens like Clostridioides difficile, can cause AAD. Therefore, it is suggested to examine stool samples of patients with predisposing factors such as intensive care unit (ICU) admission and long-time antibiotic treatment, especially with cephalosporins, for both C. difficile and PA. Full article
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Review
Continuous Versus Intermittent Infusion of Beta-Lactam Antibiotics: Where Do We Stand Today? A Narrative Review
by Basil Alawyia, Sarah Fathima, Nikolaos Spernovasilis and Danny Alon-Ellenbogen
GERMS 2024, 14(2), 162-178; https://doi.org/10.18683/germs.2024.1428 - 30 Jun 2024
Cited by 3 | Viewed by 44
Abstract
Introduction: Antimicrobial resistance (AMR) is among the greatest threats to global healthcare. The World Health Organization (WHO) estimates that by 2050 ten million deaths will be attributed to AMR annually. In response, the WHO has implemented antibiotic stewardship programs which focus on optimizing [...] Read more.
Introduction: Antimicrobial resistance (AMR) is among the greatest threats to global healthcare. The World Health Organization (WHO) estimates that by 2050 ten million deaths will be attributed to AMR annually. In response, the WHO has implemented antibiotic stewardship programs which focus on optimizing antibiotic use and raise, amongst others, the issue of the preferred method of intravenous antibiotic administration. Various studies have attempted to answer this question with conflicting results. Review: This review examined several studies assessing extended/continuous infusion compared to intermittent infusion of three beta-lactams: piperacillin-tazobactam, cefepime, and meropenem. The findings and conclusions of each study were summarized and compared to one another to provide a general overview of the current evidence. Conclusions: We conclude that continuous/extended infusion showed a greater clinical benefit in highly critical cases, namely sepsis and febrile neutropenia, compared to intermittent infusion. Additionally, in cases where a pathogen was identified, continuous/extended infusion showed superiority. Nonetheless, high-quality studies with larger samples are needed to demonstrate the difference between these two modes of infusion in a way that would better inform guidelines and policies, aiding in the fight against AMR. Full article
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Review
Infective Endocarditis by Carbapenem-Resistant Gram-Negative Bacteria—A Systematic Review
by Konstantinos Pitsikakis, Michail Skandalakis, Konstantinos Fragkiadakis, Stella Baliou and Petros Ioannou
GERMS 2024, 14(2), 149-161; https://doi.org/10.18683/germs.2024.1427 (registering DOI) - 30 Jun 2024
Cited by 2 | Viewed by 47
Abstract
Introduction: Infective endocarditis (IE) is a disease that may frequently lead to significant morbidity and is associated with high mortality rates. Even though IE is classically caused by Gram-positive bacteria, Gram-negative bacteria may seldom cause IE. Antimicrobial resistance (AMR) may pose significant problems [...] Read more.
Introduction: Infective endocarditis (IE) is a disease that may frequently lead to significant morbidity and is associated with high mortality rates. Even though IE is classically caused by Gram-positive bacteria, Gram-negative bacteria may seldom cause IE. Antimicrobial resistance (AMR) may pose significant problems in treating IE, especially for carbapenem-resistant pathogens. This study aimed to review all cases of IE by carbapenem-resistant Gram-negative bacteria in a systematic way and present information on epidemiology, clinical findings, treatment, and outcomes. Methods: A systematic review of PubMed, Cochrane Library, and Scopus (all published studies up to 6 August 2023) for published studies providing information on epidemiology, clinical findings, treatment, and outcomes of IE by carbapenem-resistant Gram-negative bacteria was performed. Results: A total of 24 studies containing data from 26 patients were included. Among all patients, 53.9% were male, and the median age was 66 years. Among all patients, 38.5% had a history of a prosthetic valve. The most commonly affected valve was the aortic, followed by the mitral valve. Fever, sepsis, emboli, and shock were the most frequent clinical findings. The most commonly isolated pathogens were Pseudomonas aeruginosa, Klebsiella pneumoniae, and Acinetobacter baumannii. Aminoglycosides, colistin, cephalosporins, and carbapenems were the most commonly used antimicrobials. Surgery was performed in 53.8% of patients. Mortality was 38.5%. Conclusions: The development of infection control measures and antimicrobial stewardship interventions is needed to reduce the spread of AMR and the likelihood of this fatal infection. Full article
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Article
Linoleic Acid Acts as a Potential Anti-Virulence Agent in Klebsiella pneumoniae
by Jayalaxmi Wangkheimayum, Tuhina Banerjee, Somorita Baishya, Swati Sharma, Manabendra Dutta Choudhury, Monjur Ahmed Laskar and Amitabha Bhattacharjee
GERMS 2024, 14(2), 136-148; https://doi.org/10.18683/germs.2024.1426 (registering DOI) - 30 Jun 2024
Viewed by 46
Abstract
Introduction: The rise in antimicrobial resistance among bacterial pathogens is a global concern, and anti-virulence therapy may be an alternative strategy to address the issue. Multidrug resistant (MDR) hypervirulent Klebsiella pneumoniae (HvKp) is known to be associated with healthcare associated infections. These are [...] Read more.
Introduction: The rise in antimicrobial resistance among bacterial pathogens is a global concern, and anti-virulence therapy may be an alternative strategy to address the issue. Multidrug resistant (MDR) hypervirulent Klebsiella pneumoniae (HvKp) is known to be associated with healthcare associated infections. These are often challenging to treat and here anti-virulence therapy may be a treatment option. The study of anti-virulence compounds against HvKp by in-silico prediction, in-vitro experiments and in-vivo assay enables to determine which anti-virulence compounds are suitable for an alternative approach MDR HvKp. Methods: Modeling of the proteins, ligand binding and molecular docking were performed targeting different hypervirulence genes viz., rmpA, rmpA2 and, iroC by in-silico analysis using different bioinformatics tool and software. Minimum inhibitory concentration (MIC) was determined for six anti-virulence compounds; curcumin, eugenol, reserpine, linoleic acid, Ɛ-anethole, and α-thujone by standard protocol. Quantitative real-time PCR was performed selecting two isolates harboring rmpA, rmpA2 and iroC genes. Galleria mellonella larva killing assay was used for in-vivo experiment. Results: In-silico analysis observed that linoleic acid could be the best fit in comparison with the other compounds. None of the anti-virulence compounds showed any inhibitory activity and upon transcriptional expression analysis of the hypervirulence genes; rmpA was marginally increased for both the isolates when linoleic acid exposure was given. Conclusions: In-vivo study revealed that linoleic acid and reserpine showed anti-virulence activity. Full article
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Article
Clinical, Epidemiological and Molecular Aspects of Patients with Mpox in Romania
by Robert Hohan, Ovidiu Vlaicu, Leontina Bănică, Andreea Ioana Tudor, Anca Negru, Simona Paraschiv and Dan Oţelea
GERMS 2024, 14(2), 126-135; https://doi.org/10.18683/germs.2024.1425 (registering DOI) - 30 Jun 2024
Cited by 1 | Viewed by 39
Abstract
Introduction: To better understand the factors which influence the spread of monkeypox (mpox) infection, the patients that tested positive for mpox virus by real-time PCR in one of the main infectious diseases centers in Bucharest were analyzed in this study, amounting to one [...] Read more.
Introduction: To better understand the factors which influence the spread of monkeypox (mpox) infection, the patients that tested positive for mpox virus by real-time PCR in one of the main infectious diseases centers in Bucharest were analyzed in this study, amounting to one third of the confirmed cases in Romania. Methods: Clinical data and laboratory tests were used to build the patient profiles. In the case of positive mpox results, next-generation sequencing of the viral genome was also performed to better comprehend the epidemiology of the infections and the evolutionary path of this virus. Results: Among 47 patients with clinical suspicion of infection, 18 cases tested positive for mpox by real-time PCR (RT-PCR). Patients were mainly men who have sex with men (MSM), often coinfected with HIV-1 (half of the cases) and presenting with other sexually transmitted infections (STIs). Phylogenetic analysis was performed on 20 samples (15 patients) and indicated that mpox cases in Romania were the result of multiple importing events followed by local spread. A few sequences from European countries (Germany, Italy, France) and USA were found to be closely related to the Romanian sequences. Intra-host evolution was observed and documented in one patient with HIV-1 infection with uncontrolled viremia, showing slightly different mutation profiles in two body compartments. Conclusions: This study showed that the mpox cases from Romania presented similar clinical, epidemiological and mutational features with those reported by other European countries. Full article
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