Microbial analysis of raw cows' milk used for cheese-making: influence of storage treatments on microbial composition and other technological traits

Luca Settanni, Elena Franciosi, Nicola Cologna, Elisa Poznanski, Agostino Cavazza

Risultato della ricerca: Articlepeer review

35 Citazioni (Scopus)

Abstract

Raw milk used to produce Grana cheese was subjected to several treatment regimes, including varying temperatures and storage times. Milk from morning and evening milking were transferred to a dairy factory sepa- rately (double delivery) or together (single delivery), after storage at the farm for 12 h; in the former case, milk was stored at 12 or 8°C, whereas, in the latter, it was kept at ambient temperature or 18°C. Values of pH of the vat milk were lower for milk samples kept at room temperature, while other physico-chemical parameters and rheological characteristics tested did not show significant differ- ences linked to the different storage temperatures of milk used for ‘‘Grana Trentino’’ cheese production. Total microorganisms and several microbial groups (psychro- trophic bacteria, coliforms, mesophilic and termophilic lactic acid bacteria, including enterococci, pseudomonads and clostridia) were detected and quantified by classical (plate count and most probable number) techniques, after each technological treatment for a total of 212 milk and cream samples. The application of a culture-independent microbiological strategy, consisting of denaturing gradient gel electrophoresis, allowed the recognition of several bacterial genera and species.
Lingua originaleEnglish
pagine (da-a)171-180
Numero di pagine10
RivistaWORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
Volume27
Stato di pubblicazionePublished - 2011

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.1300.1314???
  • ???subjectarea.asjc.2400.2402???

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