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Occurrence of Listeria Species in Broilers Pre- and Post-Chilling in Chlorinated Water at Two Slaughterhouses
Forekomsten av Listeria hos slaktkyckling
Acta Veterinaria Scandinavica volume 35, pages 149–154 (1994)
Abstract
Altogether 323 pooled samples of neck skins from 1615 broilers from 2 processing plants (A and B) were examined for the presence of Listeria species. The broilers were sampled pre-chilling–after leaving the final rinser but before entering the chiller with chlorinated water–and post-chilling–immediately upon leaving the chiller. Free available chlorine in the chilling water varied from 2 to 15 ppm in plant A and was about 10 ppm in plant B. Listeria monocytogenes was only isolated from broilers in plant A sampled post-chilling (58% of 62 samples). L. innocua was isolated from 19% and 39% of broilers sampled pre-chilling in plants A and B, respectively. Post-chilling, L. innocua was isolated from 3% and 6% of samples from plants A and B, respectively.
Sammanfattning
Halsskinn från 1615 slaktkycklingar slaktade på 2 slakterier (A och B) undersoktes på forekomst av Listeria-species. Samlingsprov om 5 halsskinn togs ut omedelbart fore resp. efter passage av vattenkylare (spinchiller). Listeria monocytogenes kunde endast påvisas i prover från slakteri A, och dar endast i halsskinn uttagna efter spinchiller. Av dessa var 58% positiva på L. monocytogenes. L. innocua lsolerades från 19% av proverna från slakteri A och 39% från slakteri Β fore passage av spinchiller. Efter spmchil-lern var frekvensen L innocua 3% resp. 6%. Halten fri obunden klor i kylvattnet varierade mellan 2 och 15 ppm i slakteri A, medan slakteri Β hela tiden holl 10 ppm.
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Acknowledgments
Financial support provided by Medical Inspector Gustav Kjerrulf’s Research Foundation through the recommendations of Swedish Veterinary Association is gratefully acknowledged.
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Loncarevic, S., Tham, W. & Danielsson-Tham, ML. Occurrence of Listeria Species in Broilers Pre- and Post-Chilling in Chlorinated Water at Two Slaughterhouses. Acta Vet Scand 35, 149–154 (1994). https://doi.org/10.1186/BF03548342
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DOI: https://doi.org/10.1186/BF03548342