Ocurrence of Vibrio spp., positive coagulase staphylococci and enteric bacteria in oysters (Crassostrea gigas) harvested in the south bay of Santa Catarina island, Brazil

Food Science and Technology (Campinas)

Roberta Juliano Ramos²  Murilo Anderson Pereira²  Letícia Adélia Miotto²  Renata D'aquino Faria²  Nelson Silveira Junior¹  Cleide Rosana Werneck Vieira² 

[1] ,Universidade Federal de Santa Catarina Centro de Ciências Agrárias Departamento de Ciência e Tecnologia de AlimentosFlorianópolis SC ,Brasil

关键词: microbiological quality;    bivalve mollusks;    filter-feeders;    Escherichia coli;    Vibrio parahaemolyticus;    Vibrio vulnificus;    qualidade microbiológica;    moluscos bivalves;    filtradores;    Escherichia coli;    Vibrio parahaemolyticus;    Vibrio vulnificus;   

DOI  :  10.1590/S0101-20612012005000061

来源: SciELO

【 摘 要 】

The aim of this study was to assess the contamination of oysters (Crassostrea gigas), harvested in six different regions of the South Bay of Santa Catarina Island, with Coliforms at 45 ºC, Escherichia coli, Vibrio spp., positive coagulase staphylococci, and Salmonella sp. over a period of one year. One hundred eighty oyster samples were collected directly from their culture sites and analyzed. Each sample consisted of a pool of 12 oysters. All of the samples analyzed showed absence of Salmonella, 18 (10%) samples showed presence of Escherichia coli, 15 (8.3%) samples were positive for V. alginolyticus, and Vibriocholerae was detected in 4 samples (2.2%). The counts of positive-coagulase staphylococci varied from <10 to 1.9 x 102 CFU.g-1, whereas the counts of Coliforms at 45 ºC and E. coli ranged from <3 to 1.5 x 102 MPN.g-1 and <3 and 4.3 x 10 MPN.g-1, respectively. Counts of V. parahaemolyticus and V. vulnificus ranged between <3 and 7 MPN.g-1, for both microorganisms. This suggests the need for monitoring these Vibrios contamination in oysters. Based on the results of the microbiological assays, the samples analyzed showed acceptable bacteriological quality, i.e., they were within the parameters established by Brazilian Legislation.

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