Zeng Hang, Rasschaert Geertrui, De Zutter Lieven, Mattheus Wesley, De Reu Koen
Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Brusselsesteenweg 370, B-9090 Melle, Belgium.
Department of Veterinary Public Health and Food Safety, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
Pathogens. 2021 Jan 17;10(1):77. doi: 10.3390/pathogens10010077.
To identify the major source of contamination in a pig slaughterhouse, samples were collected from the clean and unclean area and isolates were further typed. Carcasses entering the clean area showed a contamination rate of 96.7% in the oral cavity and 55.0% in the rectum content samples. Evisceration seemed not to be critical as the contamination rate of the carcasses was similar before (16.7%) and after (18.3%) this slaughter step. In the unclean area, a limited number of oral cavity samples were positive after bleeding, while a dramatic increase of positives was observed after dehairing. was detected in up to 0.01 mL of the recycled water collected from the dehairing machine. Genotyping of isolates showed that similar pulsotypes were present in the oral cavity and recycled water. Based on these observations it can be concluded that the recycled water used in the dehairing machine was the major source for the carcass contamination in this slaughterhouse.
为确定某家生猪屠宰场的主要污染源，从清洁区和非清洁区采集了样本，并对分离株进行了进一步分型。进入清洁区的猪胴体口腔样本污染率为96.7%，直肠内容物样本污染率为55.0%。开膛环节似乎并非关键环节，因为在此屠宰步骤前后猪胴体的污染率相似（分别为16.7%和18.3%）。在非清洁区，放血后口腔样本阳性数量有限，而烫毛后阳性数量急剧增加。从烫毛机收集的循环水中每0.01 mL就检测到[具体物质未给出]。分离株的基因分型显示，口腔和循环水中存在相似的脉冲型。基于这些观察结果可以得出结论，烫毛机使用的循环水是该屠宰场猪胴体污染的主要来源。
