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Pubmed ID :30201900
Publication Date : //

Assessment of Bacterial Accumulation and Environmental Factors in Sentinel Oysters and Estuarine Water Quality from the Phang Nga Estuary Area in Thailand.


This study characterized microbiological and chemical contamination of oyster meat and estuarine water in Phang Nga, Thailand. Pooled oyster meats ( = 144), estuarine waters ( = 96) and environmental parameters were collected from March, 2016 to February, 2017, and assessed for levels of total coliforms (TC), fecal coliforms (FC), (EC), and (VP), presence of and and levels of heavy metals (Mn, Pb and Cd). The prevalence of TC, FC and EC were in 99.3%, 94.4% and 93.1% of oyster meat and 94.8%, 79.2%, and 78.1% of water, respectively. The average VP levels was 8.5 × 10⁷ most probable number (MPN)/g oyster. Prevalence of and in the pooled oysters were 7.6% and 30.6%, respectively. The dominant serovars were Paratyphi B followed by Seremban, and Kentucky. In contrast, the prevalence of were 27.1%, but was not detected in estuarine water. Factors statistically associated with EC accumulation in oyster were level of FC, 7-day average precipitation, temperature, relative humidity, and presence of in the sample. The optimal cutoff value of EC to predict in oyster was 420 MPN/g. Results indicate this area has relatively safe levels of heavy metals, whereas bacterial contamination was very high for oysters.

Authors : Jeamsripong Saharuetai , Chuanchuen Rungtip , Atwill Edward R ,

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