Histamine and Biogenic Amine Production by Morganella morganii Isolated from Temperature-Abused Albacore
Abstract:Histamine-producing bacteria were isolated from albacore stored at 0, 25, 30, and 37°C. They were screened using Niven's differential medium, and their histamine production was confirmed by high-pressure liquid chromatography analysis. The optimum temperature for growth of histamine-producing bacteria was 25°C. The bacterium producing the highest level of histamine was isolated from fish abused at 25°C. It was identified as Morganella morganii by morphological, cultural, biochemical, and antimicrobial characteristics and by the Vitek microbial identification system. The M. morganii isolate was inoculated into tuna fish infusion broth medium, and the effect of temperature was determined for microbial growth and formation of histamine and other biogenic amines. The isolate produced the highest level of histamine, 5,253 ppm, at 25°C in the stationary phase. At 15°C, histamine production was reduced to 2,769 ppm. Neither microbial growth nor histamine formation was detected at 4°C. To determine whether the isolate can also produce other biogenic amines that can potentiate histamine toxicity, production of cadaverine, putrescine, serotonin, tryptamine, tyramine, phenylethylamine, spermidine, and spermine by the isolate was also monitored. Cadaverine, putrescine, and phenylethylamine were detected with microbial growth in the tuna fish infusion broth medium. The optimum temperature for cadaverine, putrescine, and phenylethylamine formation was found to be 25°C, as it was for histamine.
Document Type: Research Article
Affiliations: 1: Oregon State University Seafood Laboratory, 2001 Marine Drive, Astoria, Oregon 97103–3427, USA 2: ANFACO-CECOPESCA, Campus Universitario, Lagoas (Marcosende), P.O. Box 258, 36310-Vigo (Pontevedra), Spain 3: Area de Tecnología de Alimentos Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain 4: Department of Food Science and Technology, University of California, Davis, California 95616, USA
Publication date: February 1, 2000
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