Distribution of Listeria spp. in duck breast and liver during gavaging, plant processing and vacuum-packing
2010
Chipilev, N., Thracian University, Stara Zagora (Bulgaria) | Daskalov, H., National Diagnostic and Research Veterinary Institute, Sofia (Bulgaria) | Stoyanchev, T., Thracian University, Stara Zagora (Bulgaria)
The present research was carried out to investigate the prevalence of Listeria in 190 samples of duck breast and liver, obtained from three lots of ducks during gavaging - age of 79 days and then, after slaughter processing and vacuum packing - age of 86 days. Seventeen feed samples were also studied. Data showed that contamination with Listeria spp. of gavaged ducks was 6.84% - 13 specimens and of feeds – 17.6% - 3 samples. Positive swabs after slaughtering of ducks were 6 - 4.3% and those after vacuum-packing 9 - 6.4%. L. monocytogenes was found in 2.9% of all experimental specimens. The dominant serological group of Listeria spp. was II with 12 isolates followed by group I with 2 isolates.
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