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Dabadé, D. Sylvain; Wolkers-Rooijackers, Judith C.M.; Azokpota, Paulin; Hounhouigan, D. Joseph; Zwietering, Marcel H.; Nout, M.J. Rob; den Besten, Heidy M.W.
International journal of food microbiology, 02/2016, Volume: 218Journal Article
This study aimed at determining bacterial concentration and diversity in fresh tropical shrimps (Penaeus notialis) and their surrounding brackish waters and sediment. Freshly caught shrimp, water and sediment samples were collected in Lakes Nokoue and Aheme in Benin (West Africa) during two periods with different water salinity and temperature. We used complementary culture-dependent and culture-independent methods for microbiota analysis. During both sampling periods, total mesophilic aerobic counts in shrimp samples ranged between 4.4 and 5.9logCFU/g and were significantly higher than in water or sediment samples. In contrast, bacterial diversity was higher in sediment or water than in shrimps. The dominant phyla were Firmicutes and Proteobacteria in shrimps, Firmicutes, Proteobacteria, and Actinobacteria in water, and Proteobacteria and Chloroflexi in sediment. At species level, distinct bacterial communities were associated with sediment, water and shrimps sampled at the same site the same day. The study suggests that the bacterial community of tropical brackish water shrimps cannot be predicted from the microbiota of their aquatic environment. Thus, monitoring of microbiological quality of aquatic environments might not reflect shrimp microbiological quality. •Bacterial concentration and diversity were determined in shrimps, water and sediment.•Bacterial concentration was higher in shrimps than in water or sediment.•Bacterial diversity was higher in sediment or water than in shrimps.•Distinct bacterial communities were associated with shrimps, water and sediment.•Bacterial community of shrimps cannot be predicted from that of their environment.
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