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Assessment of bio-accumulation of bacteria in oysters from shellfish growing waters in Ashtamudi Lake (Kerala, India): A RAMSAR wetland

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Relation http://eprints.cmfri.org.in/10923/
http://dx.doi.org/10.1016/j.rsma.2016.05.016
 
Title Assessment of bio-accumulation of bacteria in oysters from shellfish
growing waters in Ashtamudi Lake (Kerala, India): A RAMSAR wetland
 
Creator Chinnadurai, S
Mohamed, K S
Jenni, B
Venkatesan, V
 
Subject Bacteria
Edible oyster
Shell fish
 
Description Oysters are commercially cultured from the Ashtamudi Lake in India, and support 12,000 tonnes of
bivalve fisheries/year. Oysters and oyster growing waters were sampled from July 2012 to June 2013
for analysis of total coliforms (TC), faecal coliforms (FC), Escherichia coli, faecal Streptococci (FS) and total
plate counts (TPC). E. coli MPN values in oyster growing waters were below the threshold limits set by
the USFDA and EU during the months of December to April. Seasonally, the highest MPN values for E.
coli were obtained during the monsoon season (June–September), and this trend gradually decreased
during the post-monsoon (October–January) and pre-monsoon (February–May) periods. E. coli displayed
a significant (p < 0.01) variation in accumulation during different seasons. A strong negative correlation
(R2 = −0.70, p < 0.05) between temperature and E. coli numbers in oysters was observed, while rainfall
and E. coli were positively correlated (R2 = 0.695, p < 0.05). Hence, we strongly recommend depuration
and proper cooking of oysters before consumption during the monsoon season.
 
Publisher Elsevier B.V.
 
Date 2016
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/10923/1/Chinnadurai2016.pdf
Chinnadurai, S and Mohamed, K S and Jenni, B and Venkatesan, V (2016) Assessment of bio-accumulation of bacteria in oysters from shellfish growing waters in Ashtamudi Lake (Kerala, India): A RAMSAR wetland. Regional Studies in Marine Science, 7. pp. 118-122.