Characterization of Histamine-Producing Bacteria Isolated During Processing of Indonesian Salted-Boiled Longtail (Thunnus sp.) and Eastern Little Tuna (Euthynnus sp.)
Novalia Rachmawati, S. Powell, T. Ross, M. Tamplin
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Abstract
ABSTRACT Histamine-producing bacteria (HPB) were isolated from Longtail and Eastern Little tuna harvested from Indonesian waters and processed as salted-boiled fish (SBF). Mesophilic and psychrophilic bacteria were isolated on Niven’s agar, screened for histidine decarboxylase activity and the presence of the hdc gene, and then histamine production was quantified. Six genera of HPB were identified: Enterobacter, Erwinia, Hafnia, Klebsiella, Serratia and Shigella. At stationary growth phase , mesophilic isolates produced approximately 400 times more histamine than psychrotrophic isolates. The proportion of hdc-positive isolates increased with SBF processing steps, indicating the importance of food safety measuresto minimize HPB growth and histamine production.
期刊介绍：
The Journal of Aquatic Food Product Technology publishes research papers, short communications, and review articles concerning the application of science and technology and biotechnology to all aspects of research, innovation, production, and distribution of food products originating from the marine and freshwater bodies of the world. The journal features articles on various aspects of basic and applied science in topics related to:
-harvesting and handling practices-
processing with traditional and new technologies-
refrigeration and freezing-
packaging and storage-
safety and traceability-
byproduct utilization-
consumer attitudes toward aquatic food.
The Journal also covers basic studies of aquatic products as related to food chemistry, microbiology, and engineering, such as all flora and fauna from aquatic environs, including seaweeds and underutilized species used directly for human consumption or alternative uses. Special features in the journal include guest editorials by specialists in their fields and book reviews covering a wide range of topics.
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