Evaluating seasonal variations of fecal coliform colonization in Magallana hongkongensis and Crassostrea rhizophorae: A preliminary study of oyster quality grown in Hong Kong aquacultural farms

Ho Man LEUNG, Ka Chun SUNG, Xiao Ling PENG, Kwai Chung CHEUNG, Chi Kin AU, Ken Kin Lam YUNG, Wai Chin LI

Research output: Contribution to journalArticlespeer-review

Abstract

The objective of this research is to investigate the spatial and temporal patterns of bacteriological quality in raw oysters sampled from different aquacultural farms located in Aberdeen Typhoon Shelter, Carp Gates, Lau Fau Shan, Ma Wan, and Mui Wo in Hong Kong. Magallana hongkongensis and Crassostrea rhizophorae were collected and analyzed for fecal coliforms. Throughout the 13-month monitoring period, all samples had generally high bacterial loads, ranging from 1.4 × 10⁷ cfu/g to 8.9 × 10⁷ cfu/g and exceeded the guideline suggested by the HKSAR government (i.e. 700 MPN/100 g). Besides, a linear regression analysis showed that the amount of fecal coliforms in raw oysters had strong correlations (p < 0.05) to the monthly rainfall records throughout the monitoring period. Such findings illustrate the high loading of pathogenic microorganisms in the tissue of oysters which represent a potential threat of people contracting foodborne diseases. Copyright © 2022 Elsevier Ltd. All rights reserved.
Original languageEnglish
Article number113583
JournalMarine Pollution Bulletin
Volume178
Early online dateMar 2022
DOIs
Publication statusPublished - May 2022

Citation

Leung, H. M., Sung, K. C., Peng, X. L., Cheung, K. C., Au, C. K., Yung, K. K. L., & Li, W. C. (2022). Evaluating seasonal variations of fecal coliform colonization in Magallana hongkongensis and Crassostrea rhizophorae: A preliminary study of oyster quality grown in Hong Kong aquacultural farms. Marine Pollution Bulletin, 178. Retrieved from https://doi.org/10.1016/j.marpolbul.2022.113583

Keywords

  • Aquacultural farms
  • Fecal coliform
  • Magallana hongkongensis
  • Crassostrea rhizophorae
  • Indicator organisms

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