IRTA-SCR, Ctra. Poble Nou km 5.5, Sant Carles de la Ràpita, 43540 Catalonia, Spain.
Curr Microbiol. 2013 Jul;67(1):36-40. doi: 10.1007/s00284-013-0331-8. Epub 2013 Feb 10.
The presence of Vibrio parahaemolyticus in bivalve mollusc is an important cause of foodborne illnesses, and their levels are influenced by environmental changes, such as temperature and salinity. Clams are common species in estuaries and are used in environmental monitoring programmes. Present study compared the uptake and retention of nonpathogenic V. parahaemolyticus by two species of clam (Ruditapes decussatus and R. philippinarum), cohabitating in a closed system. Results showed no significant differences were found between both species of clams. Bacterial levels are following a similar trend with values between 3.48 and 3.70 log CFU/g for R. decussatus and between 3.15 and 3.49 log CFU/g for R. philippinarum. So, in the absence of water renewal, high and stable levels of V. parahaemolyticus were observed in cultured clams after exposure. Changes in physical parameters should be taken into account to design surveillance programmes in bivalves, and sampling should focus on species that have faster filtration rates at that water temperature since they potentially represent the worst-case scenario.
副溶血性弧菌存在于双壳贝类中是食源性疾病的重要原因，其水平受环境变化的影响，如温度和盐度。蛤是河口的常见物种，被用于环境监测计划。本研究比较了两种共生在封闭系统中的蛤（菲律宾蛤仔和缢蛏）对非致病性副溶血性弧菌的摄入和保留。结果表明，两种蛤之间没有发现显著差异。细菌水平呈相似趋势，菲律宾蛤仔的数值在 3.48 和 3.70 log CFU/g 之间，缢蛏的数值在 3.15 和 3.49 log CFU/g 之间。因此，在没有水更新的情况下，暴露后养殖蛤中副溶血性弧菌的水平很高且稳定。在双壳贝类中设计监测计划时应考虑物理参数的变化，并且采样应集中在那些在该水温下具有更快过滤率的物种上，因为它们可能代表最坏的情况。
