期刊
MARINE POLLUTION BULLETIN
卷 185, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2022.114285
关键词
Salmonella; Biofilm formation; Seafood contact surfaces; Seasonal prevalence; gcpA gene; Invasive invA gene
资金
- Department of Fish Quality Assurance and Management, Fisheries College and Research Institute
The study investigated the prevalence of biofilm-forming Salmonella on different seafood contact surfaces, finding that these Salmonella were more common on boat decks and seafood processing plants. Two out of four isolates showed strong biofilm-forming ability, while the other two showed moderate ability.
The prevalence of biofilm forming Salmonella on different seafood contact surfaces was investigated. Out of 384 swab samples, 16.14 % and 1 % were confirmed biochemically and molecularly as Salmonella respectively. One out of four isolates was from the boat deck, and three were from the seafood processing plant. Salmonella was more prevalent in January, June, and September months. Different assays investigated the biofilm forming ability of isolates. Two out of four isolates have shown strong biofilms, and the others were moderate biofilm formers by microtitre plate assay. In the CRA assay, three isolates showed 'rdar' morphotype, and one showed 'bdar' morphotype. All isolates were positive for gcpA gene (similar to 1700 bp), a critical gene found in Salmonella biofilms. The microbial load of Salmonella biofilms on different contact surfaces were determined, stainless steel and HDPE were found prone to biofilms. With this, a suitable mechanism shall be formulated to control the biofilms of Salmonella.
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