Phenotypic and genomic characterization of Pseudomonas aeruginosa isolates recovered from catheter-associated urinary tract infections in an Egyptian hospital

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Eladawy, M, Thomas, J ORCID: https://orcid.org/0000-0002-1599-9123 and Hoyles, L ORCID: https://orcid.org/0000-0002-6418-342X, 2023. Phenotypic and genomic characterization of Pseudomonas aeruginosa isolates recovered from catheter-associated urinary tract infections in an Egyptian hospital. Microbial Genomics, 9 (10): 001125. ISSN 2057-5858

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Official URL: https://doi.org/10.1099/mgen.0.001125

Abstract

Catheter-associated urinary tract infections (CAUTIs) represent one of the major healthcare-associated infections, and Pseudomonas aeruginosa is a common Gram-negative bacterium associated with catheter infections in Egyptian clinical settings. The present study describes the phenotypic and genotypic characteristics of 31 P. aeruginosa isolates recovered from CAUTIs in an Egyptian hospital over a 3-month period. Genomes of isolates were of good quality and were confirmed to be P. aeruginosa by comparison to the type strain (average nucleotide identity, phylogenetic analysis). Clonal diversity among the isolates was determined; eight different sequence types were found (STs 244, 357, 381, 621, 773, 1430, 1667 and 3765), of which ST357 and ST773 are considered high-risk clones. Antimicrobial resistance (AMR) testing according to EUCAST guidelines showed the isolates were highly resistant to quinolones [ciprofloxacin (12/31, 38.7 %) and levofloxacin (9/31, 29 %) followed by tobramycin (10/31, 32.5 %)], and cephalosporins (7/31, 22.5 %). Genotypic analysis of resistance determinants predicted all isolates to encode a range of AMR genes, including those conferring resistance to aminoglycosides, β-lactamases, fluoroquinolones, fosfomycin, sulfonamides, tetracyclines and chloramphenicol. One isolate was found to carry a 422,938 bp pBT2436-like megaplasmid encoding OXA-520, the first report from Egypt of this emerging family of clinically important mobile genetic elements. All isolates were able to form biofilms and were predicted to encode virulence genes associated with adherence, antimicrobial activity, anti-phagocytosis, phospholipase enzymes, iron uptake, proteases, secretion systems, and toxins. The present study shows how phenotypic analysis alongside genomic analysis may help us understand the AMR and virulence profiles of P. aeruginosa contributing to CAUTIs in Egypt.

Item Type:	Journal article
Publication Title:	Microbial Genomics
Creators:	Eladawy, M., Thomas, J. and Hoyles, L.
Publisher:	Microbiology Society
Date:	30 October 2023
Volume:	9
Number:	10
ISSN:	2057-5858
Identifiers:	Number Type 10.1099/mgen.0.001125 DOI 1820333 Other
Rights:	© 2023 The Authors. The definitive peer reviewed, edited version of this article is published in Microbial Genomics, 9(10), Article 001125, 10.1099/mgen.0.001125
Divisions:	Schools > School of Science and Technology
Record created by:	Jeremy Silvester
Date Added:	13 Oct 2023 14:59
Last Modified:	08 Jan 2024 16:33
URI:	https://irep.ntu.ac.uk/id/eprint/49974