1. Environmental parameters influence on the dynamics of total and pathogenic Vibrio parahaemolyticus densities in Crassostrea virginica harvested from Mexico's Gulf coast.
- Author
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López-Hernández KM, Pardío-Sedas VT, Lizárraga-Partida L, Williams Jde J, Martínez-Herrera D, Flores-Primo A, Uscanga-Serrano R, and Rendón-Castro K
- Subjects
- Animals, Crassostrea growth & development, Environmental Monitoring, Mexico, Ostreidae growth & development, Principal Component Analysis, Salinity, Seasons, Temperature, Vibrio parahaemolyticus growth & development, Vibrio parahaemolyticus pathogenicity, Virulence, Crassostrea microbiology, Ostreidae microbiology, Seawater chemistry, Shellfish microbiology, Vibrio parahaemolyticus isolation & purification
- Abstract
The influence of environmental parameters on the total and pathogenic Vibrio parahaemolyticus seasonal densities in American oysters (Crassostrea virginica) was evaluated for 1 year. Harvesting site A yielded the highest mean densities of V. parahaemolyticus tlh+, tdh+/trh-, tdh-/trh+ and tdh+/trh+ during spring season at 2.57, 1.74, 0.36, and -0.40 log10 MPN/g, respectively, and tdh+/orf8+ during winter season (0.90 log10 MPN/g). V. parahaemolyticus tlh+ densities were associated to salinity (R(2)=0.372, P<0.022), tdh+/trh+ to turbidity (R(2)=0.597, P<0.035), and orf8+ to temperature, salinity, and pH (R(2)=0.964, P<0.001). The exposure to salinity and temperature conditions during winter and spring seasons regulated the dynamics of V. parahaemolyticus harboring potentially pathogenic genotypes within the oyster. The adaptive response of V. parahaemolyticus to seasonal environmental changes may lead to an increase in survival and virulence, threatening the seafood safety and increasing the risk of illness., (Copyright © 2014 Elsevier Ltd. All rights reserved.)
- Published
- 2015
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