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Abstract

Aims: To determine the Salmonella serotype distribution, antimicrobial resistance profiles, and antimicrobial resistance genes (ARGs) in food samples obtained from local markets in a low-income urban setting and nearby farms in Cambodia.

Methods and results: One hundred and thirty-nine Salmonella isolates from various food sources were tested for antibiotic susceptibility using a panel of 12 antibiotics, and 81 selected Salmonella isolates were further sequenced for serotype distribution and ARG identification. The results showed that 71% (99/139) of the isolates exhibited resistance to at least one antibiotic, with 39% (39/99) classified as multidrug-resistant (MDR). The highest resistance was observed against azithromycin (37%), followed by oxytetracycline (35%). A total of 32 serotypes were identified, with the six most common being S. Corvallis (7%), S. Haifa (6%), S. Weltevreden (6%), S. Agona (5%), S. Kentucky (5%), and S. Livingstone (5%). A broad range of ARGs was observed across multiple antibiotic classes, including macrolides, aminoglycosides, tetracyclines, phenicols, fluoroquinolones, sulfonamide–trimethoprim, beta-lactams, and MDR genes.

Conclusions: The results highlight the potential role of fresh food products in the widespread dissemination of Salmonella strains resistant to multiple antibiotics.

Published in

Journal of Applied Microbiology
2025, volume: 136, number: 6, article number: lxaf137

SLU Authors

UKÄ Subject classification

Food Science
Pathobiology

Publication identifier

  • DOI: https://doi.org/10.1093/jambio/lxaf137

Permanent link to this page (URI)

https://res.slu.se/id/publ/144455