GERMSPub Date : 2023-12-31eCollection Date: 2023-12-01DOI: 10.18683/germs.2023.1408
Ricardo Campos Monteiro, Rogerio Caldeira Rodrigues Malta, Geovana Lacerda Rodrigues, Gustavo Luis de Paiva Anciens Ramos, Janaína Dos Santos Nascimento
{"title":"<i>Acinetobacter baumannii</i>: a known pathogen, a new problem.","authors":"Ricardo Campos Monteiro, Rogerio Caldeira Rodrigues Malta, Geovana Lacerda Rodrigues, Gustavo Luis de Paiva Anciens Ramos, Janaína Dos Santos Nascimento","doi":"10.18683/germs.2023.1408","DOIUrl":"10.18683/germs.2023.1408","url":null,"abstract":"","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"381-384"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866168/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
GERMSPub Date : 2023-12-31eCollection Date: 2023-12-01DOI: 10.18683/germs.2023.1401
Heba E AboElfarh, El-Sayed E Habib, Mohamed M A El-Sokkary
{"title":"Effect of dexamethasone and tenoxicam on the virulence activities of different <i>Pseudomonas aeruginosa</i> clinical isolates.","authors":"Heba E AboElfarh, El-Sayed E Habib, Mohamed M A El-Sokkary","doi":"10.18683/germs.2023.1401","DOIUrl":"10.18683/germs.2023.1401","url":null,"abstract":"<p><strong>Introduction: </strong>This study aimed to examine the effect of commonly used non-antibiotic drugs (dexamethasone and tenoxicam), on treatment of <i>Pseudomonas aeruginosa</i> infections, antibiotic resistance and virulence in this pathogen.</p><p><strong>Methods: </strong>Four antibiotics (gentamicin, cefepime, ciprofloxacin and meropenem) were investigated. The proteolysis and hemolysis were selected as virulence factors for investigation. In this work, we selected the following final concentrations: dexamethasone (0.0052 μg/mL) and tenoxicam (2.7 μg/mL) to be used in combination with antibiotics or alone for investigation of their effects on antibiotic resistance and virulence in <i>P. aeruginosa</i> isolates.</p><p><strong>Results: </strong>The drugs either increased or decreased antibiotic resistance in only 0-3 isolates, which indicates that the investigated drugs did not significantly affect the antibiotic resistance. Interestingly, our study demonstrated that both dexamethasone and tenoxicam increased the hemolytic activity of the investigated isolates. On the other hand, our results indicated that no overall final increasing or decreasing effect could be observed for dexamethasone on the proteolytic activity, while tenoxicam increased the proteolytic activity of the investigated isolates. Interestingly, by real-time PCR dexamethasone has shown significant down-regulation of virulence genes namely <i>algD, plcH</i> and <i>toxA,</i> apparently, in case of combination with ciprofloxacin and with gentamicin in one isolate. However, a negative influence was observed in another isolate. Unfortunately, in the case of tenoxicam the only positive effect was observed in the combination with gentamicin in one isolate.</p><p><strong>Conclusions: </strong>Resistance of <i>P. aeruginosa</i> against gentamicin and ciprofloxacin may be affected by combining these antibiotics with dexamethasone or tenoxicam.</p>","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"321-331"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866164/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fosfomycin: A potential oral option for treatment of urinary tract infections in Sri Lanka in the context of high antibiotic resistance.","authors":"Nishadi Jayathilaka, Tharushi Pathirana, Chathurika Kumari, Varuna Navaratne, Samanmalee Gunasekara, Dilini Nakkawita, Thamarasi Senaratne","doi":"10.18683/germs.2023.1400","DOIUrl":"10.18683/germs.2023.1400","url":null,"abstract":"<p><strong>Introduction: </strong>Fosfomycin is an effective treatment for urinary tract infections (UTIs). It is not currently used in Sri Lanka to treat UTIs. Hence, this study was conducted to assess the fosfomycin susceptibility for <i>E. coli</i> in urinary isolates, with an aim to find the usability of fosfomycin in the context of high antibiotic resistance.</p><p><strong>Methods: </strong><i>E. coli</i> isolates were identified by the colony appearance and by performing biochemical tests for the urinary coliform isolates collected from two different hospitals in Western Province Sri Lanka, during the period of November 2021 to February 2022. Susceptibility to fosfomycin 200 μg disc was performed following the Clinical Laboratory Standard Institute (CLSI) disc diffusion method.</p><p><strong>Results: </strong>A total of 101 <i>E. coli</i> isolates from both oncology patients (52.5%) and non-oncology patients (47.5%) were identified and included in the study. The study sample showed majority of females (63.3%). Ampicillin showed the highest resistance rate (72.2%) while fosfomycin was the only antibiotic that showed 100% in vitro susceptibility to all the tested clinical isolates. The overall presence of multidrug-resistant (MDR) and carbapenem-resistant (CR) <i>E. coli</i> were 47.5% and 9.9% respectively.</p><p><strong>Conclusions: </strong>Fosfomycin is a potential antibiotic option especially for MDR and CR organisms, with 100% in vitro susceptibility. Further studies involving multiple centers, with larger sample size and clinical efficacy studies would be important to assess the potential use of fosfomycin especially for the treatment of UTI-causing MDR and CR organisms.</p>","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"314-320"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866161/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
GERMSPub Date : 2023-12-31eCollection Date: 2023-12-01DOI: 10.18683/germs.2023.1410
Giorgio Novelli, Mattia Moretti, Maria Costanza Meazzini, Davide Paolo Bernasconi, Sergio Maria Ivano Malandrin, Monica Raggi, Cristina Maria Angela Cassé, Luca Arturo Pavesi, Davide Sozzi
{"title":"The analysis of saliva as screening in patients with COVID-like symptoms.","authors":"Giorgio Novelli, Mattia Moretti, Maria Costanza Meazzini, Davide Paolo Bernasconi, Sergio Maria Ivano Malandrin, Monica Raggi, Cristina Maria Angela Cassé, Luca Arturo Pavesi, Davide Sozzi","doi":"10.18683/germs.2023.1410","DOIUrl":"10.18683/germs.2023.1410","url":null,"abstract":"","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"388-391"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866171/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
GERMSPub Date : 2023-12-31eCollection Date: 2023-12-01DOI: 10.18683/germs.2023.1409
Aris P Agouridis, Spyridon A Karageorgos, Constantinos Tsioutis
{"title":"Role of gender in hesitancy toward the COVID-19 vaccine beyond medical students: Reply to Rujittika Mungmunpuntipantip and Viroj Wiwanitkit.","authors":"Aris P Agouridis, Spyridon A Karageorgos, Constantinos Tsioutis","doi":"10.18683/germs.2023.1409","DOIUrl":"10.18683/germs.2023.1409","url":null,"abstract":"","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"385-387"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866167/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
GERMSPub Date : 2023-12-31eCollection Date: 2023-12-01DOI: 10.18683/germs.2023.1405
Mihai Săndulescu, Valentin Daniel Sîrbu, Ion Alexandru Popovici
{"title":"Bacterial species associated with peri-implant disease - a literature review.","authors":"Mihai Săndulescu, Valentin Daniel Sîrbu, Ion Alexandru Popovici","doi":"10.18683/germs.2023.1405","DOIUrl":"10.18683/germs.2023.1405","url":null,"abstract":"<p><p>Peri-implantitis is a pathological condition in dental medicine that manifests as an inflammatory process affecting the tissues surrounding dental implants. Peri-implantitis occurs when the soft and hard tissues surrounding these implants become inflamed, leading to progressive destruction of the supporting bone. The etiology of peri-implantitis is multifactorial, involving microbial, host-related, and environmental factors. Microbial involvement in peri-implantitis can be explained either by direct in-situ virulence activation leading to pathogenicity, or by induction of low-grade chronic immune activation, leading to long-term persistence of a pro-inflammatory status. Understanding peri-implantitis is pivotal in maintaining the long-term success of dental implants and improving patient outcomes in implant-supported restorations. Recognizing the etiological factors, including particular bacterial species, genetic predispositions, and environmental influences, is very important for devising effective preventive strategies and targeted interventions.</p>","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"352-361"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866163/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
GERMSPub Date : 2023-12-31eCollection Date: 2023-12-01DOI: 10.18683/germs.2023.1404
Stylianos A Kandarakis, Nikolaos Spernovasilis, Ilias Georgalas, Michalis Mendris, Constantinos Tsioutis, Aris P Agouridis
{"title":"Endophthalmitis caused by <i>Enterococcus casseliflavus:</i> a systematic review of literature.","authors":"Stylianos A Kandarakis, Nikolaos Spernovasilis, Ilias Georgalas, Michalis Mendris, Constantinos Tsioutis, Aris P Agouridis","doi":"10.18683/germs.2023.1404","DOIUrl":"10.18683/germs.2023.1404","url":null,"abstract":"<p><strong>Introduction: </strong><i>Enterococcus casseliflavus</i> is a rare pathogen in human infections, despite being widely distributed in natural environments. This systematic review aims to evaluate the evidence related to endophthalmitis caused by <i>E. casseliflavus</i>.</p><p><strong>Methods: </strong>A thorough search of PubMed, PubMed Central, and Scopus databases was conducted, covering the period up to October 2022.</p><p><strong>Results: </strong>A total of 53 records were identified, with 8 studies reporting a total of 21 cases meeting the inclusion criteria. Among these studies, 7 described isolated case reports, while 1 study described 14 cases. The overall quality of the reports was good, as all articles were determined to have low risk of bias. Vancomycin susceptibility was reported in only one case of isolated case reports, while the remaining cases were all vancomycin resistant. With regard to management, in most cases intravenous ampicillin and linezolid were administered, while only one study reported administration of vancomycin.</p><p><strong>Conclusions: </strong>Ophthalmologists should be aware of the potential for <i>E. casseliflavus</i> to cause endophthalmitis infections and the challenges associated with its intrinsic resistance to vancomycin.</p>","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"343-351"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866162/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
GERMSPub Date : 2023-12-31eCollection Date: 2023-12-01DOI: 10.18683/germs.2023.1407
Alexandru Gliga, Mihai Săndulescu, Oana Amza, Ruxandra Stănescu, Marina Imre
{"title":"Dental pathologies of endodontic origin and subsequent bacterial involvement - a literature review.","authors":"Alexandru Gliga, Mihai Săndulescu, Oana Amza, Ruxandra Stănescu, Marina Imre","doi":"10.18683/germs.2023.1407","DOIUrl":"10.18683/germs.2023.1407","url":null,"abstract":"<p><p>Dental pathologies of endodontic origin are varied in nature, and include infectious and non-infectious causes. Through this review, we aim to provide a deeper understanding of the role of bacterial involvement and in the pathogenesis of endodontic pathologies, by reviewing the relevant literature on the most common bacterial species involved, and their capacity to organize as biofilms. Furthermore, we focus on the most important recent updates in the management of endodontic infections, from a multidisciplinary perspective.</p>","PeriodicalId":45107,"journal":{"name":"GERMS","volume":"13 4","pages":"373-380"},"PeriodicalIF":2.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10866160/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}