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Infectious Disorders - Drug Targets

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ISSN (Print): 1871-5265
ISSN (Online): 2212-3989

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Research Article

Multidrug-Resistance Genes in Pseudomonas aeruginosa from Wound Infections in a Tertiary Health Institution in Osogbo, Nigeria

Author(s): Ajibola O. Akinloye, Jose O. Adefioye, Catherine O. Adekunle, Benjamin U. Anomneze, Olufunmilola B. Makanjuola, Olakunle J. Onaolapo, Adejoke Y. Onaolapo and Olugbenga A. Olowe*

Volume 21, Issue 1, 2021

Published on: 17 January, 2020

Page: [90 - 98] Pages: 9

DOI: 10.2174/1871526520666200117112241

Price: $65

Abstract

Background: Multidrug Resistant Pseudomonas aeruginosa (MDRPA) is a ubiquitous opportunistic organism that poses threat to the management of infections globally.

Objectives: The objectives of the current research were to assess the antibiotic resistance profiles as well as Multiple Antibiotic Resistance (MAR) Index of clinical isolates of P. aeruginosa associated with wound infections. Presence of Extended Spectrum Beta Lactamase genes (bla CTX-M, bla SHV and bla TEM) and Carbapenemase genes (bla KPC and blaNDM) were also determined among the isolates.

Methods: Swab samples were collected from 255 patients with wound infections. Bacterial identification was done by standard diagnostic tests. The identity of isolates was confirmed by the detection of the exoA gene using the PCR technique. Antibiotic susceptibility testing and resistance profile were determined using the disc diffusion method. Resistance genes were amplified by the PCR method.

Results: A total of 235 (92.2%) bacterial isolates were recovered from the wounds of the 255 patients, of these, 124 (52.8%) were Gram-negative bacilli while the remaining 111 (47.2%) were Gram-positive cocci. A total of 69 Pseudomonas aeruginosa strains were recovered from the wound specimens. Imipenem was the most effective antibiotic against these isolates (92.8% isolates were susceptible) while all isolates were resistant to Meropenem, Cefepime, Ticarcillin, Amoxicillin-clavulanic acid, Cefotaxime, Ampicillin and Cefpodoxime. All 69 Pseudomonas aeruginosa isolates were multidrug resistant (MDR). Of the isolates selected for PCR, all were positive for TEM, CTX-M and SHV genes while one-third were blaKPC and blaNDM producers.

Conclusion: This study demonstrated high prevalence of carbapenem-resistant strains of P. aeruginosa, suggesting that there is an urgent need in Nigeria for the enactment and enforcement of policies and necessary laws restricting the availability and indiscriminate use of antibiotics.

Keywords: Antibiotic susceptibility, ESBL genes, carbapenemase genes, multiple antibiotic resistance index, PCR, Osogbo, Pseudomonas aeruginosa.

Graphical Abstract

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