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Survival rate and enzyme activities of Lactobacillus acidophilus following frozen storage.

Author(s) : MURGA M. L. Fernandez, HOLDAGO A. P. de Ruiz, VALDEZ G. F. de

Type of article: Article

Summary

The ability of two strains of Lactobacillus acidophilus, CRL 640 and CRL 800, to survive and retain their biological activities under frozen storage was determined. Freezing and thawing, as well as frozen storage, damaged the cell membrane, rendering the microorganisms sensitive to sodium chloride and bile salts. Both lactic acid production and proteolytic were depressed after 21 days at -20 deg C, whereas beta-galactosidase activity per cell unit was increased. Cell injury was partially overcome after repair in a salt-rich medium.

Details

  • Original title: Survival rate and enzyme activities of Lactobacillus acidophilus following frozen storage.
  • Record ID : 1999-3241
  • Languages: English
  • Source: Cryobiology - vol. 36 - n. 4
  • Publication date: 1998/06

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