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A rapid method for differentiation of dairy lactic acid bacteria by enzyme systems

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Journal of Industrial Microbiology

Summary

A rapid and simple technique utilizing the APIZYM enzymatic patterns complemented with arginine dihydrolase and citratase was developed for species differentiation of 40 lactic acid bacteria relevant to the dairy industry.Streptococcus species in general produced no β-galactosidase, except forStreptococcus thermophilus. Lactobacillus species showed strong aminopeptidases and galactosidases but contained no arginine dihydrolase and citratase. Among the group N-streptococci,Streptococcus diacetylactis produced citratase, whereasStreptococcus cremoris differed by the production of butyrate esterase.Streptococcus faecalis was readily distinguishable fromStreptococcus lactis by butyrate esterase activity that was the basis of the differential agar developed. Heterofermentative lactobacilli differed from homofermentative lactobacilli in possessing arginine dihydrolase and citratase but by not producing leucine-aminopeptidase.

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Authors and Affiliations

  1. Food Research Center, Agriculture Canada, J2S 4Z4, St-Hyacinthe, Québec, Canada

    B. H. Lee

  2. Département de sciences et technologie des aliments, Université Laval, G1K 7P4, Ste-Foy, Quebec, Canada

    B. H. Lee, S. Haché & R. E. Simard

Authors
  1. B. H. Lee
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  2. S. Haché
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  3. R. E. Simard
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Lee, B.H., Haché, S. & Simard, R.E. A rapid method for differentiation of dairy lactic acid bacteria by enzyme systems. Journal of Industrial Microbiology 1, 209–217 (1986). https://doi.org/10.1007/BF01569274

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  • DOI: https://doi.org/10.1007/BF01569274

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