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Histidine decarboxylase‐positive lactic acid bacteria strains and the formation of histamine in ripened cheeses
Author(s) -
Valle Luis J.,
Ginovart Marta,
Gordún Elena,
Carbó Rosa
Publication year - 2018
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.13708
Subject(s) - starter , tyramine , food science , cadaverine , histamine , chemistry , putrescine , ethylamine , lactic acid , histidine decarboxylase , raw milk , biogenic amine , fermentation , bacteria , histidine , biochemistry , biology , organic chemistry , enzyme , genetics , receptor , neurotransmitter , endocrinology
Abstract The relationship between histidine decarboxylase‐positive ( hdc +) lactic acid bacteria (LAB) counts and the amounts of biogenic amines, particularly histamine, in cheeses made with and without LAB starter were investigated. Sixty LAB strains were isolated from ripened cheeses made with raw milk inoculated with lactic starter and cheeses without starter. The strains were identified by carbohydrate fermentation test and the histidine decarboxylase gene was determined by PCR. Biogenic amine contents from the cheeses were determined by HPLC. LAB counts and their diversity were higher in the cheeses without starter. The cheeses contained low concentrations of the studied amines. The lowest concentrations were found for ethylamine and putrescine followed by cadaverine, tyramine, phenyletilamine, and histamine, especially in the cheeses with starter. There was a direct relationship between the percentage of hdc + LAB strains and histamine and between this percentage and the sum of tyramine, phenylethylamine and ethylamine concentrations. Practical applications It is a well‐known fact that the content of biogenic amines in cheeses should be controlled because these compounds can cause toxicity and undesirable flavor. The results of the present study show that LAB starter cultures do not completely prevent the formation of biogenic amines in cheeses manufactured with raw milk. Although the LAB starter helps to reduce the total amount of biogenic amines, histamine concentration is not clearly linked to the use of starter. In order to ensure the safety of cheeses, it is necessary to use high‐quality milk, follow hygienic practices and take advantage of the selective pressure of the physicochemical and technological parameters that occur during cheese making.