Seasonal dynamics and diversity of bacteria in retail oyster tissues.

Abstract:

:Oysters are one of the important vehicles for the transfer of foodborne pathogens. It was reported that bacteria could be bio-accumulated mainly in the gills and digestive glands. In artificially treated oysters, bacterial communities have been investigated by culture-independent methods after harvest. However, little information is available on the seasonal dynamics of bacterial accumulation in retail oyster tissues. In this study, retail oysters were collected from local market in different seasons. The seasonal dynamics and diversity of bacteria in oyster tissues, including the gills, digestive glands and residual tissues, were analyzed by denaturing gradient gel electrophoresis (DGGE). It was interesting that the highest bacterial diversity appeared in the Fall season, not in summer. Our results indicated that Proteobacteria was the predominant member (23/46) in oyster tissues. Our results also suggested that bacterial diversity in gills was higher than that in digestive glands and other tissues. In addition, not all the bacteria collected from surrounding water by gills were transferred to digestive glands. On the other hand, few bacteria were found in oyster tissues except in the gills. Therefore, the gills could be the best candidate target tissue for monitoring of pathogenic bacteria either to human or to oyster.

journal_name

Int J Food Microbiol

authors

Wang D,Zhang Q,Cui Y,Shi X

doi

10.1016/j.ijfoodmicro.2013.12.008

subject

Has Abstract

pub_date

2014-03-03 00:00:00

pages

14-20

eissn

0168-1605

issn

1879-3460

pii

S0168-1605(13)00575-8

journal_volume

173

pub_type

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