GLOBAL JOURNAL OF FISHERIES SCIENCE
Integrity Research Journals

ISSN: 2782-750X
Model: Open Access/Peer Reviewed
DOI: 10.31248/GJFS
Start Year: 2018
Email: gjfs@integrityresjournals.org


Prevalence, multidrug resistance, and multiple antibiotic resistance index of Vibrio cholerae and Vibrio parahaemolyticus in wild-caught fishes from two major dams in Ibadan, Nigeria

https://doi.org/10.31248/GJFS2026.114   |   Article Number: 5C4207912   |   Vol.8 (5) - October 2026

Received Date: 16 August 2026   |   Accepted Date: 06 October 2026  |   Published Date: 30 October 2026

Authors:  Selim A. Alarape* , AbdulRoqeeb A. Oladele and Ismail O. Badmus

Keywords: Nigeria., multi-drug resistance., Antimicrobial resistance, MAR index, Vibrio species, wild-caught fish.

The emergence of AMR in aquatic environments poses significant public health risks, particularly through foodborne transmission pathways. This study investigated the prevalence, antimicrobial resistance patterns, and multiple antibiotic resistance (MAR) indices of Vibrio cholerae and Vibrio parahaemolyticus isolated from wild-caught fish obtained from Eleyele and Asejire dams in Ibadan, Nigeria. A total of 83 wild-caught fish were sampled, and tissues (muscle, liver, and intestine) were aseptically collected. Presumptive identification of Vibrio species was performed using Thiosulfate Citrate Bilesalts Sucrose (TCBS) agar (Millipore®, Germany) and biochemical characterization. Real-time PCR was used to characterise the isolates (final volume of 15 µL) using the Norgen NZTtech kit with cycling conditions: activation at 95°C for 1 min, denaturation at 95°C for 30 s, annealing at 58°C for 30 s, extension at 72°C for 30s, and a final hold at 4°C. Antibiotic susceptibility testing was conducted using the Kirby–Bauer disk diffusion method following CLSI guidelines. Water quality parameters of the two dams were measured using water quality test kits. The water quality of both Asejire and Eleyele dams showed high temperature, pH, dissolved oxygen, suspended solids, ammonia, nitrite, and BOD levels, while salinity remained below critical limits. Vibrio cholerae prevalence in fish from Eleyele Dam was highest in the muscle (72.3%), followed by the liver (63.6%) and intestine (48.5%), while V. parahaemolyticus showed comparatively lower but notable prevalence across the tissues. In fish sampled from Asejire Dam, V. cholerae prevalence was exceptionally high, with detection rates of 92%, 82%, and 92% in the muscle, liver, and kidney, respectively. In contrast, V. parahaemolyticus showed substantially lower prevalence in the corresponding tissues, at 20%, 22%, and 12%, respectively. Isolates exhibited high levels of multidrug resistance against the antibiotic panel. MARI values ranged from 0.4–1.0 for V. cholerae and 0.6–0.9 for V. parahaemolyticus. The findings highlight the potential role of wild-caught fish as reservoirs of multidrug-resistant Vibrios and underscore the need for continuous surveillance, as well as improved antimicrobial stewardship.

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