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Growth of Yersinia enterocolitica O:3 on modified atmosphere packaged lamb

1995; Elsevier BV; Volume: 12; Linguagem: Inglês

10.1016/s0740-0020(95)80105-7

1095-9998

Alice Doherty, J.J. Sheridan, Paul Allen, D.A. McDowell, I.S. Blair, D. Harrington,

Bee Products Chemical Analysis

The growth of pathogenic Yersinia enterocolitica serotype 0:3 was investigated on lamb pieces and lamb mince, packaged in air and a range of modified atmospheres, at 5 or 0° C. The modified atmospheres investigated were: (i) vacuum pack; (ii) 80% O2/20% CO2; (iii) 50% CO2/50% N2; and (iv) 100% CO2. Y. enterocolitica 0:3 counts were examined at 28 days in each of the atmosphere/temperature combinations. Growth of Y. enterocolitica 0:3 occurred on lamb pieces stored at 5° C in air and all the modified atmospheres tested. On lamb pieces stored at 0° C, pathogen growth was noted in air, vacuum packs and 50% CO2/50% N2. In all atmospheres except air, growth of Y. enterocolitica 0:3 on minced lamb at 5 and 0° C was reduced compared to growth on lamb pieces. At 5° C on minced lamb, growth of the organism occurred in air, vacuum packs and 50% CO2/50% N2. However, at 0° C, growth was observed in air only. An atmosphere containing a high O2 concentration was inhibitory to the growth of Y. enterocolitica 0:3. In addition, the combination of a high CO2 (100%) atmosphere and low temperature (0° C) was inhibitory to growth.