Original scientific paper

The influence of population size of gram-negative psychrotrophs on survival during pasteurization

Irena Rogelj ; Biotehniška fakulteta, Oddelek za zootehniko, Institut za mlekarstvo, Groblje 3, 1230 Domžale, Slovenija
Bojana Bogovič

Abstract

The influence of initial population size on destruction kinetics during milk pasteurization (63 °C/30 min) was studied relative to three Pseudomonas fluorescens isolates from pasteurized milk. The greatest reduction of viable cells was observed during first stage of milk pasteurization to reaching final temperature (63 °C/4 min) for all isolates and every starting population size. When inital population size attained <10^4 CFU/ml lethality determined immediately after pasteurization was 100%. Despite this fact viable cells were observed in all samples of pasteurized milk stored 48 hours at 7 °C.

Keywords

Pseudomonas fluorescens; pasteurization; population reduction

Hrčak ID:

96730

URI

https://hrcak.srce.hr/96730

Publication date:

1.12.1990.

Article data in other languages: croatian

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