alexa Chemical characterisation and histamine-forming bacteria in salted mullet roe products.
Nutrition

Nutrition

Journal of Nutrition & Food Sciences

Author(s): Kung HF, Chien LT, Liao HJ, Lin CS, Liaw ET,

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Abstract Sixteen salted mullet roe products sold in the retail markets in Taiwan were purchased and tested to determine the occurrence of histamine and histamine-forming bacteria. The levels of pH, salt content, water content, total volatile basic nitrogen (TVBN) and aerobic plate count (APC) in all samples ranged from 5.4 to 5.8, 5.1\% to 7.2\%, 15.4\% to 27.3\%, 32.0 to 69.6mg/100g and <1.0 to 7.1logCFU/g, respectively. None of these samples contained total coliform and Escherichia coli. The average content of each of the nine biogenic amines in all samples was less than 4mg/100g, and only one mullet roe sample had the histamine content (8.18mg/100g) greater than the 5.0mg/100g allowable limit suggested by the US Food and Drug Administration. Two histamine-producing bacterial strains capable of producing 10.7ppm and 9.6ppm of histamine in trypticase soy broth (TSB) supplemented with 1.0\% l-histidine (TSBH) were identified as Staphylococcus carnosus by 16S rDNA sequencing with PCR amplification, and they were isolated from the sample with higher histamine content (8.18mg/100g). Copyright © 2008 Elsevier Ltd. All rights reserved. This article was published in Food Chem and referenced in Journal of Nutrition & Food Sciences

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