Abstract

CASTANEDA-RUELAS, Gloria Marisol  and  JIMENEZ-EDEZA, Maribel. EVALUATION OF CULIACAN VALLEY RIVERS IN MEXICO AS RESERVOIRS OF Salmonella SEROTYPES RESISTANT TO ANTIBIOTICS. Rev. Int. Contam. Ambient [online]. 2018, vol.34, n.2, pp.191-201. ISSN 0188-4999.  https://doi.org/10.20937/rica.2018.34.02.01.

Salmonella is one of the main causes of bacterial gastroenteritis and its presence and survival in aquatic ecosystems has been reported. This, coupled with the indiscriminate use of antibiotics in human and agricultural activities, could favor the emergence and dissemination of resistant strains in these environments. Therefore, the objective of this study was to determine antibiotic resistance (AR) in 111 Salmonella strains classified in 28 non-typhoid serotypes, isolated from rivers in northwestern Mexico. The disk diffusion method was used for the evaluation of a panel of 16 antibiotics, as recommended by the Clinical and Laboratory Standards Institute. Of the strains analyzed, 50.5 % (56/111) were resistant to at least one antibiotic and 41.1 % (23/56) presented multiresistance. The majority (87.5%) of the serotypes presented AR, mainly to ampicillin, neomycin, and chloramphenicol. The antibiogram revealed 26 AR patterns among the Salmonella strains. The Salmonella serotypes Oranienburg and Saintpaul, showed a great diversity of AR patterns. These findings improve knowledge about the AR Salmonella serotypes of aquatic origin. In addition, they suggest the potential risk that the rivers in northwestern Mexico serve as reservoirs and sources of propagation of this bacterium between different hosts or environments.

Keywords : bacteria; dissemination; antibiotypes; water.

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