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EVALUATION OF A 18 DEG C/45 HOUR PLATE COUNT TECHNIQUE FOR THE ENUMERATION OF PSYCHROTROPHIC BACTERIA IN RAW AND PASTEURIZED MILK.

Author(s) : OEHLRICH H. K., MCKELLAR R. C.

Type of article: Article

Summary

BACTERIAL COUNTS WERE DONE AT 280 K (7 DEG C) FOR 10 D AND AT 291 K FOR 45 H ON SAMPLES OF RAW AND PASTEURIZED MILK. CATALASE-POSITIVE MICROORGANISMS WERE ENUMERATED AT 291 K/45 H. CLOSE CORRELATIONS WERE OBTAINED BETWEEN THE NUMBERS OF MICROORGANISMS FOLLOWING 291 K/45 H AND 280 K/10 D INCUBATIONS IN RAW AND PASTEURIZED MILK. SIMILAR CORRELATIONS WERE NOTED FOR THE 291 K/45 H-CATALASE AND THE 280 K/10 D METHODS FOR RAW AND PASTEURIZED MILK. INCUBATION AT 291 K FOR 45 H PROVIDES A RELIABLE ESTIMATE OF THE NUMBERS OF PSYCHROTROPHS. THE USE OF CATALASE DOES NOT IMPROVE SENSITIVITY OF THE TEST SIGNIFICANTLY.

Details

  • Original title: EVALUATION OF A 18 DEG C/45 HOUR PLATE COUNT TECHNIQUE FOR THE ENUMERATION OF PSYCHROTROPHIC BACTERIA IN RAW AND PASTEURIZED MILK.
  • Record ID : 1984-0668
  • Languages: English
  • Source: Journal of Food Protection - vol. 46 - n. 6
  • Publication date: 1983/06
  • Document available for consultation in the library of the IIR headquarters only.

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