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Published on: September 5, 2013
Viability and Histidine Decarboxylase Activity of Halophilic Histamine-Forming Bacteria During Frozen Storage
Tateo Fujii1, Kinya Kurihara1, Masayo Okuzumi1,2
1Department of Food Science and Technology, Tokyo University of Fisheries, Konan, Minato, Tokyo 108, Japan.
Abstract:
The specific activity of histidine-decarboxylase of halophilic histamine-forming bacteria, Photobacterium phosphoreum and Photobacterium histaminum sp. nov., remained 27~53% of the initial value after seven days storage at -20°C, while the viable cells decreased by more than 6 log cycles of the initial counts. This finding suggests the possibility that outbreaks of scombroid fish poisoning are caused by the ingestion of frozen-thawed fish and its products, even when the viable count of histamine-forming bacteria is low.
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