Four bacteriological examinations were carried out in a slaughterhouse at several months' intervals to clarify the actual state of contamination of its facilities with Salmonella and Arizona.
1. One strain (8.3%) of
Salmonella enteritidis and two strains (16.7%) of Arizona were isolated from 12 samples of final sewage.
2. Two strains of Salmonella
S. enteritidis and
S. senftenberg and two strains of Arizona were detected from 12 samples of water with which the viscera had been washed finally.
3. One strain each of
S. enteritidis and Arizona was isolated from 12 samples of sewage from the swine-slaughtering section.
4. One strain (2.9%) of
S. typhimurium and two strains (5.7%) of Arizona were detected from 35 samples consisting of 10 flies each harvested mostly at the manure depository.
These results suggest a thick contamination of the slaughterhouse with Salmonella and Arizona throughout the year and a necessity of control of waste water evacuated from the slaughterhouse.
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