| pathogenic bacteria associated with oysters (crassostrea brasiliana) and estuarine water along the south coast of brazil. | oysters and estuarine water samples were collected monthly, from june 1998 to march 1999, in the cananéia estuary, on the south coast of são paulo, brazil, and analyzed for bacterial hazards with and without depuration in filtered estuarine water. aeromonas spp., plesiomonas shigelloides, vibrio cholerae o1, vibrio parahaemolyticus, and vibrio vulnificus were counted in oyster samples using the most probable number (mpn) and their presence verified in the surrounding estuarine water samples. the ... | 2007 | 17613090 |
| correlation between environmental factors and prevalence of vibrio parahaemolyticus in oysters harvested in the southern coastal area of sao paulo state, brazil. | the presence of vibrio parahaemolyticus in 123 oyster samples collected from an estuary on the southern coast of sao paulo state, brazil, was investigated. of the 123 samples, 99.2% were positive with densities ranging from < 3 to 10(5) most probable number (mpn)/g. densities correlated significantly with water temperature (r = 0.48; p < 0.001) but not with salinity (r = -0.09; p = 0.34). the effect of harvest site on counts was not significant (p > 0.05). these data provide information for the ... | 2010 | 20023076 |
| Characterization of Vibrio parahaemolyticus isolated from oysters and mussels in São Paulo, Brazil. | Vibrio parahaemolyticus is a marine bacterium, responsible for gastroenteritis in humans. Most of the clinical isolates produce thermostable direct hemolysin (TDH) and TDH-related hemolysin (TRH) encoded by tdh and trh genes respectively. In this study, twenty-three V. parahaemolyticus, previously isolated from oysters and mussels were analyzed by PCR using specific primers for the 16S rRNA and virulence genes (tdh, trh and tlh) and for resistance to different classes of antibiotics and PFGE. Ni ... | 2011 | 21915463 |
| occurrence and distribution of vibrio parahaemolyticus in retail oysters in sao paulo state, brazil. | vibrio parahaemolyticus is a potentially pathogenic bacterium that occurs naturally in estuarine environments worldwide, and is often associated with gastroenteritis in humans following consumption of raw bivalve mollusks, especially raw oysters. the occurrence of total and pathogenic v. parahaemolyticus in 74 samples of raw oysters collected in restaurants, supermarkets, groceries and beach huts in sao paulo state, was monitored between february 2006 and january 2007. enumeration of v. parahaem ... | 2010 | 21056785 |
| a quantitative risk assessment model for vibrio parahaemolyticus in raw oysters in sao paulo state, brazil. | a risk assessment of vibrio parahaemolyticus associated with raw oysters produced and consumed in são paulo state was developed. the model was built according to the united states food and drug administration framework for risk assessment. the outcome of the exposure assessment estimated the prevalence and density of pathogenic v. parahaemolyticus in raw oysters from harvest to consumption. the result of the exposure step was combined with a beta-poisson dose-response model to estimate the proba ... | 2014 | 24786920 |