_____________________________________________________________________________________________________ *Corresponding author: E-mail: clara.eleazar@unn.edu.ng; Microbiol. Res. J. Int., vol. 33, no. 11, pp. 14-21, 2023 Microbiology Research Journal International Volume 33, Issue 11, Page 14-21, 2023; Article no.MRJI.110928 ISSN: 2456-7043 (Past name: British Microbiology Research Journal, Past ISSN: 2231-0886, NLM ID: 101608140) Antibiogram of Pseudomonas aeruginosa Clinical Isolates Tested for Pan, Extensive and Multidrug Resistances Uzoamaka Maduakor a , Clara Eleazar b* , Chidozie Nwafor a and Veronica Emenuga a a Department of Medical Laboratory Sciences, Faculty of Health Sciences, University of Nigeria, Nigeria. b Departments of Microbiology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria. Authors’ contributions This work was carried out in collaboration among all authors. Author UM designed the study, wrote the protocol and wrote the first draft of the manuscript. Author CE performed the statistical analysis and edited for publication. Author CN managed the analyses of the study. Author VE managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/MRJI/2023/v33i11-121413 Open Peer Review History: This journal follows the Advanced Open Peer Review policy. Identity of the Reviewers, Editor(s) and additional Reviewers, peer review comments, different versions of the manuscript, comments of the editors, etc are available here: https://www.sdiarticle5.com/review-history/110928 Received: 17/10/2023 Accepted: 21/12/2023 Published: 30/12/2023 ABSTRACT Background: Pseudomonas aeruginosa usually cause nosocomial infections with concurrent morbidity and mortality and is generally resistant to many antibiotics. Aim: This study was aimed to determine the proportion of pan-drug-resistant (PDR), extensively drug-resistant (XDR), and multidrug-resistant (MDR) P. aeruginosa strains recovered from human samples. Methodology: The retrospective study was conducted in the University of Nigeria Teaching Original Research Article