Shelf life of pork from five different quality classes.

A total of 117 loins were selected on the cutting line at 24h post-mortem to study the long term shelf life (35 days, 4 degrees C) of vacuum packaged pork from five different quality classes (PSE: pale, soft, exudative; PFN: pale, firm, non-exudative; RSE: red, soft, exudative; RFN: red, firm, non-exudative; and DFD: dark, firm, dry). The microbial load at 0 d was not significantly different (P>0.05) among the pork quality classes, indicating that the initial microflora was influenced by the dressing conditions at the plant, not by the meat quality class. But after 35 d of storage, total aerobic mesophilic and presumptive lactic acid bacteria counts were higher (P<0.05) in DFD pork due to its higher ultimate pH. RSE was the second quality class most susceptible to spoilage, whereas PFN, RFN and PSE pork had similar microbial loads. Further research is needed to elucidate the causes of the shorter shelf life in RSE pork.

[1]  M F Rothschild,et al.  Correlations among selected pork quality traits. , 2002, Journal of animal science.

[2]  R. G. Kauffman,et al.  The use of filter paper to estimate drip loss of porcine musculature. , 1986, Meat science.

[3]  S. Brown,et al.  The relationships between initial pH, reflectance and exudation in pig muscle. , 1987, Meat science.

[4]  R. G. Kauffman,et al.  Is colour brightness (L-value) a reliable indicator of water-holding capacity in porcine muscle? , 1994, Meat science.

[5]  B M Mackey,et al.  The relationship between the phenotypic properties of bacteria from chill-stored meat and spoilage processes. , 1992, Society for Applied Bacteriology symposium series.

[6]  R. G. Kauffman,et al.  The effectiveness of examining early post-mortem musculature to predict ultimate pork quality. , 1993, Meat science.

[7]  D. G. Topel,et al.  MICROBIOLOGY OF PALE, DARK AND NORMAL PORK , 1976 .

[8]  R. G. Kauffman,et al.  Muscle protein changes post mortem in relation to pork quality traits. , 1997, Meat science.

[9]  P. Davidson,et al.  Relationships between ultimate pH and microbial, chemical, and physical characteristics of vacuum-packaged pork loins. , 2008, Journal of food science.

[10]  R. G. Kauffman,et al.  Glycolytic potential of red, soft, exudative pork longissimus muscle. , 1999, Journal of animal science.

[11]  C. Gill,et al.  The microbiology of DFD fresh meats: A review. , 1981, Meat science.

[12]  A. Murray,et al.  Impact of the halothane gene on muscle quality and pre-slaughter deaths in Western Canadian pigs , 1998 .

[13]  C. Gariépy,et al.  Shelf life of ground poultry meat stored under modified atmosphere. , 2000, Poultry science.

[14]  G. Greer.  Bacteria and Meat Quality , 1989 .

[15]  L. Faucitano,et al.  A MODIFIED MEAT JUICE CONTAINER (EZ‐DRIPLOSS) PROCEDURE FOR A MORE RELIABLE ASSESSMENT OF DRIP LOSS AND RELATED QUALITY CHANGES IN PORK MEAT , 2007 .

[16]  R. G. Kauffman,et al.  Use of electrical conductivity to predict water-holding capacity in post-rigor pork. , 2000, Meat Science.

[17]  C. Gill,et al.  Assessment of the hygienic characteristics of a process for dressing pasteurized pig carcasses , 1997 .

[18]  R. Hitchcock,et al.  The causes of variation , 1884, American Journal of Science.

[19]  J. Killefer,et al.  The effect of pH on shelf-life of pork during aging and simulated retail display. , 2009, Meat science.