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  • Title: Bifidobacteria as indicators of faecal contamination along a sheep meat production chain.
    Author: Delcenserie V, Loncaric D, Bonaparte C, Upmann M, China B, Daube G, Gavini F.
    Journal: J Appl Microbiol; 2008 Jan; 104(1):276-84. PubMed ID: 17922830.
    Abstract:
    AIMS: The potential use of bifidobacteria as indicators for faecal contamination was studied along a sheep meat production and processing chain. The levels of bifidobacteria were compared with those of Escherichia coli. Total viable counts were followed along the chain (244 samples). METHODS AND RESULTS: Forty-three per cent of the samples contained bifidobacteria, of which 15% were solely detected using a PCR method based on the hsp60 gene and not by a culture-based method. Bifidobacteria were detected in only three of nine sheep faeces samples using one or the other method. However, carcasses (types C and E) were highly contaminated. These sample types (30% and 28%, respectively) were positive for bifidobacteria and negative for E. coli. The species Bifidobacterium pseudolongum and Bif. thermophilum, isolated from faecal samples, were predominant. Bifidobacterium choerinum were found in C, D, E and F sample types. CONCLUSIONS: Bifidobacteria were shown more efficient than E. coli in carcasses samples. The presence of Bif. choerinum suggested a faecal pork contamination. SIGNIFICANCE AND IMPACT OF THE STUDY: Detection and identification of bifidobacteria, in correlation with E. coli counting, should improve hygiene quality of mutton processing chains.
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