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  • Title: The amylase-producing microflora of semi-preserved canned sausages: identification of the bacteria and characterization of their amylases.
    Author: Mitrica L, Granum PE.
    Journal: Z Lebensm Unters Forsch; 1979 Jul 27; 169(1):4-8. PubMed ID: 484054.
    Abstract:
    Thirteen strains of amylase-producing bacteria were isolated from semi-preserved canned sausages and their ingredients. All belonged to the genus Bacillus, and could be separated into 4 different groups. Two groups were different strain of B. subtilis, one was B. amyloliquefaciens and the last was B. macerans. The identification of the different bacteria species was supported by disc gel electrophoresis of the supernatant culture fluid, after growth. The amylases were characterized with regard to temperature optimum, pH optimum and thermostability. Although some of the amylases appear to be quite thermostable, the only explanation for starch degradation in semi-preserved foods seems to be the amylase production from outgrowing spores which survived the heat treatment.
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