The effect of film permeability on the storage life and microbiology of vacuum-packed meat.

Joints of beef were stored in packaging films with oxygen permeabilities ranging from 0–920 ml/m224 h/atm at 25 °C and 100% r.h. The storage life of the ‘vacuum-packaged’ meat, as assessed by discolouration and the development of putrefactive odours, was inversely related to film permeability; the best results were obtained with meat which received ‘zero oxygen’ treatment. The growth rates and final counts of Pseudomonas spp. increased with increasing film permeability; the storage life of the meat corresponded with the time taken for the counts of the organism to reach ca. 106/cm2 for putrefactive odours to be produced. Although their growth rate was unaffected, the final counts of Brochothrix thermosphacta also increased with increasing film permeability. These results are discussed in terms of the influence of film permeability on the inhibitory effects of Lactobacillus spp., whose numbers were unaffected by the permeability of the film used, and the substrates in the meat available to the bacteria.

[1]  C. Gill,et al.  Spoilage of vacuum-packaged dark, firm, dry meat at chill temperatures , 1979, Applied and environmental microbiology.

[2]  A. Wauters,et al.  Sources of psychrotrophic bacteria on meat at the abattoir. , 1978, The Journal of applied bacteriology.

[3]  C. Gill,et al.  Storage quality of dark, firm, dry meat , 1978, Applied and environmental microbiology.

[4]  C. Gill,et al.  The ecology of bacterial spoilage of fresh meat at chill temperatures. , 1978, Meat science.

[5]  C. Gill,et al.  The development of aerobic spoilage flora on meat stored at chill temperatures. , 1977, The Journal of applied bacteriology.

[6]  P. Gibbs,et al.  Incidence and Spoilage Potential of Isolates from Vacuum-packaged Meat of High pH Value , 1977 .

[7]  K. M. Smith,et al.  The Effect of Storage in Various Gaseous Atmospheres on the Microflora of Lamb Chops Held at—1°C , 1977 .

[8]  C. Gill Substrate limitation of bacterial growth at meat surfaces. , 1976, The Journal of applied bacteriology.

[9]  P. Sneath,et al.  Brochothrix, a New Genus Tentatively Placed in the Family Lactobacillaceae , 1976 .

[10]  R. Lawrie,et al.  The protein of intermediate moisture meat stored at tropical temperature , 1976 .

[11]  J. G. Murray,et al.  Changes in the microbiology of vacuum-packaged beef. , 1975, The Journal of applied bacteriology.

[12]  L. A. Roth,et al.  Effect of lactobacilli and carbon dioxide on the growth of Microbacterium thermosphactum on fresh beef. , 1975, Canadian journal of microbiology.

[13]  M. Solberg,et al.  OXYGEN UPTAKE IN POSTRIGOR BOVINE MUSCLE , 1974 .

[14]  A. P. Barton,et al.  Simple economical anaerobiosis. , 1973, Journal of clinical pathology.

[15]  L. A. Roth,et al.  Studies on the bacterial flora of vacuum-packaged fresh beef. , 1972, Canadian journal of microbiology.

[16]  A. Sharpe,et al.  Stomaching: a new concept in bacteriological sample preparation. , 1972, Applied microbiology.

[17]  G. A. Gardner A selective medium for the enumeration of Microbacterium thermosphactum in meat and meat products. , 1966, The Journal of applied bacteriology.