Resistance to high hydrostatic pressure of some strains of Clostridium botulinum in phosphate buffer [foods]

The spores of four types of Clostridium botulinum, suspended in phosphate buffer, were evaluated for their resistance to combined pressure-temperature treatments (600 MPa - 100 and 110 deg C, 800 MPa - 80, 88 and 90 deg C). The two type A strains have similar decimal reduction times (D): strain 62A...

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Published inIndustria Conserve (Italy) Vol. 80; no. 2
Main Authors Gola, S. (Stazione Sperimentale per l´Industria delle Conserve Alimentari (SSICA), Parma (Italy)), Rovere, P.P. (Stazione Sperimentale per l´Industria delle Conserve Alimentari (SSICA), Parma (Italy))
Format Journal Article
LanguageEnglish
Italian
Published 01.04.2005
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Summary:The spores of four types of Clostridium botulinum, suspended in phosphate buffer, were evaluated for their resistance to combined pressure-temperature treatments (600 MPa - 100 and 110 deg C, 800 MPa - 80, 88 and 90 deg C). The two type A strains have similar decimal reduction times (D): strain 62A has a D = 3.1´ and 1.38´ at 800 MPa - 90 deg C and at 600 MPa - 100 deg C, respectively, whereas type A ATCC 19397 has a D = 3.25´ and 0.91´ at 800 MPa - 88 deg C and at 600 MPa - 100 deg C, respectively. Non-proteolytic type B ATCC 25765 proved to be more resistant than proteolytic type B A TCC 7948: D at 800 MPa - 90 deg C was 3.45´ and 2.66´ for the non-proteolytic and for the proteolytic strain, respectively E´ stata valutata lo resistenza a trattamenti combinati pressione-calore (600 MPa - 100 e 110 gradi C, 800 Mpa - 80, 88 e 90 gradi C) di spore di quattro tipi di Clostridium botulinum sospese in tampone fosfato. I due ceppi tipo A hanno tempi di riduzione decimali (D) simili: il tipo 62A ha un D = 3.1´ e 1.38´ a 800 Mpa - 90 gradi C e a 600 MPa - 100 gradi C, rispettivamente, mentre il tipo A ATCC 19397 ha un D = 3.25´ e 0.91´ a 800 MPa - 88 gradi C e a 600 MPa - 100 gradi C, rispettivamente. Il tipo B non proteolitico ATCC 25765 è risultato più resistente del tipo B proteolitico ATCC 7948: il D a 800 MPA - 90 gradi C è risultato 3.45´ e 2.66´ per il ceppo non proteolitico e per quello proteolitico, rispettivamente
Bibliography:17 ref.
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ISSN:0019-7483