Methicillin-Resistant Staphylococcus aureus Carriage among Neonate Mothers, Healthcare Workers, and Environmental Samples in Neonatal Intensive Care Units: A Systematic Review.

Background: Methicillin-resistant Staphylococcus aureus (MRSA) is a significant cause of morbidity and mortality among neonates admitted to neonatal intensive care units (NICUs). The MRSA colonization of neonates, attributed to various sources, including mothers, healthcare workers, and environmental surfaces, can lead to severe infection, prolonged hospital stays, and even death, imposing substantial economic burdens. Given the pressing need to mitigate MRSA spread in these vulnerable environments, further examination of the subject is warranted. This systematic review is aimed at synthesizing available evidence on MRSA carriage proportions among mothers of newborns, healthcare workers, and environmental surfaces in NICUs. Methodology. We included observational studies published in English or French from database inception to March 21, 2023. These studies focused on MRSA in nonoutbreak NICU settings, encompassing healthy neonate mothers and healthcare workers, and environmental surfaces. Literature search involved systematic scanning of databases, including Medline, Embase, Web of Science, Global Health, and Global Index Medicus. The quality of the selected studies was assessed using the Hoy et al. critical appraisal scale. The extracted data were summarized to calculate the pooled proportion of MRSA positives, with a 95% confidence interval (CI) based on the DerSimonian and Laird random-effects model. Results: A total of 1891 articles were retrieved from which 16 studies were selected for inclusion. Most of the studies were from high-income countries. The pooled proportion of MRSA carriage among 821 neonate mothers across four countries was found to be 2.1% (95% CI: 0.3-5.1; I2 = 76.6%, 95% CI: 36.1-91.5). The proportion of MRSA carriage among 909 HCWs in eight countries was determined to be 9.5% (95% CI: 3.1-18.4; I2 = 91.7%, 95% CI: 87.1-94.6). The proportion of MRSA carriage among HCWs was highest in the Western Pacific Region, at 50.00% (95% CI: 23.71-76.29). In environmental specimens from five countries, a pooled proportion of 16.6% (95% CI: 3.5-36.0; I2 = 97.7%, 95% CI: 96.6-98.4) was found to be MRSA-positive. Conclusion: With a significant heterogeneity, our systematic review found high MRSA carriage rates in neonate mothers, healthcare workers, and across various environmental surfaces in NICUs, posing a potential risk of nosocomial infections. Urgent interventions, including regular screening and decolonization of MRSA carriers, reinforcing infection control measures, and enhancing cleaning and disinfection procedures within NICUs, are crucial. This trial is registered with CRD42023407114.

Antibiotic consumption history of patients in a referred laboratory in Yaounde

Background. Regulation of antibiotic prescription and consumption remain a major public health burden in low- and middle-income country. This study aimed to describe the antibiotic consumption of patients who had a positive antibiotic culture in a reference laboratory. Methods. A retrospective descriptive study was conducted among 113 participants with positive antibiogram with a documented history of antibiotics intake at the Yaoundé University Teaching Hospital (YUTH) in Cameroon between January 2016 to June 2021. Data were stored and analyzed using the Census and Survey Processing System (CSPro) version 7.3 and Statistical Package for Social Science (SPSS) version 25.0. Descriptive statistic was used to estimate the indicators. Results. Of the 113 patients enrolled, 105 had a history of drug use; 56 participants (53, 3%) had taken at least 2 antibiotics prior to sampling. Cephalosporins were the most consumed antibiotics (41, 0%), followed by nitroimidazols (28, 6%) and penicillins (28,6%). According to the WHO classification, 55 (52, 4%) took the major priority antibiotics. Conclusion. We are on the alert and there is an urging need to raise awareness among clinicians and patients alike by providing them with good clinical practice guidelines.

Alteration of the gut fecal microbiome in children living with HIV on antiretroviral therapy in Yaounde, Cameroon.

Multiple factors, such as immune disruption, prophylactic co-trimoxazole, and antiretroviral therapy, may influence the structure and function of the gut microbiome of children infected with HIV from birth. In order to understand whether HIV infection altered gut microbiome and to relate changes in microbiome structure and function to immune status, virological response and pediatric ART regimens, we characterized the gut microbiome of 87 HIV-infected and 82 non-exposed HIV-negative children from Yaounde, a cosmopolitan city in Cameroon. We found that children living with HIV had significantly lower alpha diversity in their gut microbiome and altered beta diversity that may not be related to CD4+ T cell count or viral load. There was an increased level of Akkermansia and Faecalibacterium genera and decreased level of Escherichia and other Gamma proteobacteria in children infected with HIV, among other differences. We noted an effect of ethnicity/geography on observed gut microbiome composition and that children on ritonavir-boosted protease inhibitor (PI/r)-based ART had gut microbiome composition that diverged more from HIV-negative controls compared to those on non-nucleoside reverse-transcriptase inhibitors-based ART. Further studies investigating the role of this altered gut microbiome in increased disease susceptibility are warranted for individuals who acquired HIV via mother-to-child transmission.

Streptococcus agalactiae prevalence and antimicrobial susceptibility pattern in vaginal and anorectal swabs of pregnant women at a tertiary hospital in Cameroon.

OBJECTIVE: Group B Streptococcus (GBS) or Streptococcus agalactiae is part of the normal flora of the gut and genital tract, thus carrier pregnant women can transmit this germ to newborns which could cause early neonatal infection. In Cameroon, few studies have been conducted on GBS, thus this study sought to detect the rectal and vaginal colonization rates and the antibiotic susceptibility profile of the identified strains in pregnant women. We therefore conducted a cross-sectional study over a 6 months period analysing vaginal and anorectal samples obtained from 100 pregnant women. Cultures for the isolation of GBS were carried out according to standard microbiological methods and grouping done using the Pastorex strep Kit. All strains isolated were used for susceptibility test to various antibiotics as recommended by the French microbiology society, using the disk-diffusion method. RESULTS: The detected colonization rate was 14%. No resistance to ampicillin, oxacillin, amoxycillin-clavulanate, cefotaxime, pristinamycin, vancomycin and clindamycin was found. Just 12, 94 and 82% of strains showed sensitivity to gentamycin, erythromycin and cefoxitin respectively. This study therefore revealed that at least one out of every ten women is GBS colonized and strains showed uniform sensitivity to beta lactamines. However, decreased sensitivity to erythromycin was detected.

Caracterisation phénotypique des souches de pseudomonas aeruginosa isolées dans la ville de Yaoundé (Cameroun)

Introduction. L'objectif etait de determiner la proportion de souches de Pseudomonas aeruginosa (P. aeruginosa) exprimant des mecanismes de resistance dans la ville de Yaounde. Methode. Il s'agissait d'une etude prospective et descriptive realisee du 02 janvier au 30 juin 2012. Des souches de P. aeruginosa provenant de divers produits pathologiques de patients ont ete identifiees a l'aide de la galerie API 20NE (Biomerieux). Pour les prelevements urinaires; une cytologie etait faite pour verifier l'absence de cancer. La lecture interpretative de l'antibiogramme a ete faite par diffusion sur gelose Mueller-Hinton selon CA-SFM 2011. Resultats. Au total 34 souches de P. aeruginosa ont ete isolees dont 85;3?% chez patients hospitalises. Parmi ces souches; 41;2?% etaient isolees des urines; 23;5?% des hemocultures et 17;6?% des suppurations. Les urines montraient a l'examen cytologique des modifications inflammatoires aigues et l'absence de cancer. Le profil de resistance aux antibiotiques a montre une resistance elevee preferentielle des Beta-lactamines notamment a la ticarcilline (35;29?%). Concernant les Beta-lactamines; les phenotypes les plus observes ont ete pour les 2/3 sauvages et 26;5?% pour les penicillinases ; quant aux aminosides 94;1?% etaient de phenotype sauvage; tandis que 2/3 etaient de type sauvage pour les fluoroquinolones. Conclusion. Une association Beta-lactamines/aminosides ou Beta-lactamines/fluoroquinolones pourrait etre preconisee afin de lutter contre toute infection a P. aeruginosa