Impact of a novel spray-chilling system on surface microflora, water activity and weight loss during beef carcass chilling

K.J. Kinsella, J.J. Sheridan, T.A. Rowe, F. Butler, A. Delgado, A. Quispe-Ramirez, I.S. Blair, D.A. McDowell

    Research output: Contribution to journalArticlepeer-review

    35 Citations (Scopus)

    Abstract

    Commercially slaughtered and dressed beef carcass sides (n=30) were followed through a standard commercial chill unit fitted with a new “Jasca” air humidification system adjusted to provide intermittent water spraying of carcass sides (spray cycle 2 min on, 1 min off) for 15 h. Immediately after dressing, and after 24 h in the chill unit, the surface water activity, and the weight of each side was measured, and 5 cm2 samples were recovered from four locations, i.e. rump, flank, brisket and neck on the surface of each side. These samples, and similar samples from control sides (n=30) processed in a standard commercial chill unit, were subjected to microbiological examination by direct and resuscitation counts on plate count agar (PCA), MacConkey agar (MAC) and violet red bile glucose agar (VRBGA). No significant differences were observed between bacterial numbers on test and control samples on each of the above agars, at each sample point/occasion. Comparison of direct and resuscitation counts suggested the presence of substantial numbers of injured cells, at both stages (pre- and post-chill), on test and control sides. After 24 h in chill units, test sides exhibited an average weight loss of 1.36% (±0.36%), which is significantly less (P
    Original languageEnglish
    Pages (from-to)483-490
    JournalFood Microbiology
    Volume23
    Issue number5
    DOIs
    Publication statusPublished - 2006

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