Indicative and pathogenic microbiological quality of aquacultured finfish grown in different production systems
| Autor: | S. Pullela, George J. Flick, Stephen A. Smith, Charles W. Coale, Custy F. Fernandes, George S. Libey |
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| Rok vydání: | 1998 |
| Předmět: |
Quality Control
food.ingredient Fish farming Colony Count Microbial Fisheries Fresh Water Escherichia coli O157 Microbiology Feces food Salmonella Clostridium botulinum Escherichia coli Animals Food science Yersinia enterocolitica biology Recirculating aquaculture system Tilapia Hybrid striped bass biology.organism_classification Listeria monocytogenes United States Fecal coliform Fishery Trout Oreochromis Oncorhynchus mykiss Rainbow trout Bass Water Microbiology Food Science |
| Zdroj: | Journal of food protection. 61(2) |
| ISSN: | 0362-028X |
| Popis: | The nature and number of indicator and pathogenic microbes in fish reared using recirculating and nonrecirculating water systems were compared. For each system, 20 samples of rainbow trout (Oncorhynchus mykiss), tilapia (Oreochromis spp.), hybrid striped bass (Morone saxatilis x M. chrysops), and pacu (Piaractus mesopotamicus) were randomly selected and gutted, and microbial analyses were performed using AOAC procedures. Five fish were subsampled and analyzed for indicative microbial quality with 3M Petrifilm (). The general microbial quality differed significantly (P < 0.05) among the production systems, except for total coliform counts. Rainbow trout cultured in recirculating and nonrecirculating water systems had lower counts for aerobes (2.00 to 3.11 log CFU/g) (p < 0.05), than other species, whereas trout reared in a recirculating water system had significantly lower psychrotrophic numbers (0.86 to 1.85 log CFU/g). Pacu had the highest fecal coliform counts (2.74 to 3.70 log CFU/g), whereas hybrid striped bass and rainbow trout grown in nonrecirculating systems had lower fecal coliform counts (0.00 to 1.39 log CFU/g). Rainbow trout grown in a nonrecirculating system had significantly higher Escherichia coli counts (0.00 to 2.11 log CFU/g). The human bacterial pathogens Listeria monocytogenes, Yersinia enterocolitica, Escherichia coli O157:H7 and Salmonella spp. were not isolated form the fish sampled. However, Clostridium botulinum botulinum was isolated from all the aquacultured fish sampled except pacu and tilapia grown in a recirculating aquaculture system. However, the counts were very low, ranging from 0.0 to 2.3 MPN/g. |
| Databáze: | OpenAIRE |
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