MICROBIOLOGICAL ANALYSIS OF TILAPIA AND WATER IN AQUACULTURE FARMS FROM SINALOA

José Antonio Valenzuela-Armenta, Sylvia Páz Díaz-Camacho, Julio Adalberto Cabanillas-Ramos, Magdalena de Jesus Uribe-Beltrán, Mária del Carmen de la Cruz-Otero, Ignacio Osuna-Ramírez, María Elena Báez-Flores

Resumen


Tilapia is the most cultivated fish around the world. The fish’s environment can harbor bacteria, especially coliforms, which are not normal biota of fish. These microorganisms are contamination indicator groups (IGs) reflecting the possible presence of pathogens, which can compromise the safety of fishery products. The IGs prevalence was estimated in tilapia and water from 29 aquaculture farms. Total and fecal coliforms (TC, FC), mesophilic aerobic bacteria (MAB), S. aureus, E. coli, Salmonella sp., and Streptococcus sp., were investigated. In tilapia, TC and FC were detected in 64% and 48% of the samples, ranging from 4.0 x 101 to 9.8 x 105, and from 1.0 x 101 to 6.4 x 103 CFU/g, respectively; MAB were detected in 90% of the samples. In water, TC and FC were detected in 57% and 35% of the samples, oscillating from 1.0 x 101 to 2.28 x104, and from 1.0 x 101 to 1.2 x 103 CFU/mL, respectively. MAB were detected in 89% of the water samples. Mostly E. coli and Enterobacter agglomerans were detected. Generally, IGs concentrations meet the Mexican regulations; however, the tilapia’s microbiological quality must be continuously monitored.


Palabras clave


Tilapia; Total coliforms; Fecal coliforms; Mesophilic aerobic bacteria; E. coli

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DOI: http://dx.doi.org/10.18633/biotecnia.v20i1.525

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