Indian Journal of Medical Microbiology

Journal Information
ISSN / EISSN : 0255-0857 / 1998-3646
Current Publisher: Medknow (10.4103)
Former Publisher: Elsevier BV (10.4103) , , Elsevier BV (10.4103) Elsevier BV (10.1016)
Total articles ≅ 3,684
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, Dikwata Thabiso Phofa, Maphoshane Nchabeleng, Andrew Munyalo Musyoki
Indian Journal of Medical Microbiology; doi:10.1016/j.ijmmb.2021.03.005

Abstract:
Antimicrobial resistance is now globally recognised amongst the greatest threat to human health. Acinetobacter baumannii's’ (A. baumannii) clinical significance has been driven by its ability to obtain and transmit antimicrobial resistance factors. In South Africa, A. baumannii is a leading cause of healthcare associated infections (HAI). In this study, we investigated the genetic determinants of multi-drug resistant A. baumannii (MDRAB) at a teaching hospital in Pretoria, South Africa. One hundred non repetitive isolates of A. baumannii were collected for the study. Antimicrobial susceptibility testing was performed using the VITEK2 system. The prevalence of antibiotic resistance associated genes and AdeABC efflux pump system were investigated using conventional PCR. Genetic relatedness of isolates was determined using rep-PCR. Seventy (70) of 100 isolates collected were confirmed multi-drug resistant and were blaOXA51positive. Phenotypically, the isolates where resistant to almost all tested antibiotics. One isolate showed intermediate susceptibility to tigecycline while all were susceptible to colistin. Oxacillinase gene blaOXA-23 was the most detected at 99% and only 1% was positive for blaOXA-40. For Metallo-betalactamases (MBL), blaVIMwas the most frequently detected at 86% and blaSIM-1 at 3% was the least detected. Fifty-six isolates had the required gene combination for an active efflux pump. The most prevalent clone was clone A at 69% of the isolates. Colistin and tigecycline are the most effective against investigated isolates. The major genotypic determinant for drug resistances is oxacillinases blaOXA-23. The study reports for the first time, blaOXA-40 and blaSIM-1 detection in A. baumannii in South Africa.
Megha Sharma, , Shreya Khandelwal
Indian Journal of Medical Microbiology; doi:10.1016/j.ijmmb.2021.03.015

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, Rahul Shukla, Ranjini Roy
Indian Journal of Medical Microbiology; doi:10.1016/j.ijmmb.2021.03.016

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H Beena, , Anupma Jyoti Kindo
Indian Journal of Medical Microbiology; doi:10.1016/j.ijmmb.2021.03.001

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, Annapurna Parida
Indian Journal of Medical Microbiology; doi:10.1016/j.ijmmb.2021.03.003

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, Nargis K. Bali
Indian Journal of Medical Microbiology; doi:10.1016/j.ijmmb.2021.03.008

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Indian Journal of Medical Microbiology; doi:10.1016/j.ijmmb.2021.03.004

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