Affiliations: *WHO National Salmonella and Shigella Center. Department of Medical sciences, Ministry of Public Health
**Department of Food Science & Technology , Faculty of Science &
Technology, Thammasat University, Klong Luang District , Pathumtnani 12121, Thailand
Source: 1. Abstract in Proceeding of Department of Medical Science 13th : 6
2. Full paper in Journal of Disease Control 2002 : 78
3. Format of Presentation : Poster
Language: Thai with English abstract
Fecal specimens of 18 frozen food plants‘ employee were investigated for salmonellosis, shigellosis and vibrios food poisoning. Those of positive were recorded as carriers. The average carrier rate obtained from 15 plants according to a yearly monitoring program was 8.88 % for salmonellosis and 2.0 % for vibrios . Results were also interpreted according to 5 production lines and it was found that the carrier rate obtained from a frozen processed seafood line was highest for both salmonellosis and vibrios. Continuous monitoring included employee from 3 plants of which salmonellosis trends were corresponding to the highest in summer and the lowest in rainy season , but not with vibrios. Shigellosis were none from all fecal samples investigated. The average salmonellosis carrier rate obtained from 3 frozen chicken lines was recorded as 8.07%, whereas none for vibrios. Nevertheless, among them , the highest record was 14.50 % and the lowest was 4.72 % for salmonellosis. More than 70 serovars were isolated , among them , the most frequent ones were S. Anatum , S. Rissen, S. Panama and S. Stanley. Both salmonellosis and Vibrios isolated were active against Norfloxacin.