Role of shellfish hatchery as a reservoir of antimicrobial resistant bacteria |
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| Authors: | Claudio D Miranda Rodrigo Rojas Marcela Garrido Julieta Geisse Gerardo González |
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| Institution: | 1. Aquatic Pathobiology Laboratory, Department of Aquaculture, Universidad Católica del Norte, 1281 Larrondo Street, Coquimbo, Chile;2. Centro de Estudios Avanzados (CEAZA), 1281 Larrondo Street, Coquimbo, Chile;3. Research on Antimicrobial Agents Laboratory, Department of Microbiology, Universidad de Concepción, Concepción, Chile |
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| Abstract: | The main aim of this study was to determine the occurrence of resistant bacteria in florfenicol-treated and untreated scallop larval cultures from a commercial hatchery and to characterize some selected florfenicol-resistant strains. Larval cultures from untreated and treated rearing tanks exhibited percentages of copiotrophic bacteria resistant to florfenicol ranging from 0.03% to 10.67% and 0.49–18.34%, respectively, whereas florfenicol resistance among oligotrophic bacteria varied from 1.44% to 35.50% and 3.62–95.71%, from untreated and treated larvae, respectively. Florfenicol resistant microbiota from reared scallop larvae mainly belonged to the Pseudomonas and Pseudoalteromonas genus and were mainly resistant to florfenicol, chloramphenicol, streptomycin and co-trimoxazole. This is the first study reporting antimicrobial resistant bacteria associated to a shellfish hatchery and the results suggest that a continuous surveillance of antimicrobial resistance even in absence of antibacterial therapy is urgently required to evaluate potential undesirable consequences on the surrounding environments. |
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| Keywords: | Florfenicol Heterotrophic bacteria Antimicrobial resistance Scallop culture Chile Hatchery |
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