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Fri Feb 17 12:47:26 EST 1995

We conducted a serologic survey of swine in the state of Georgia for 
a number of years using repetitive ELISA as a discovery test and the 
Western Blot as a confirmatory test.  About 40,000 samples were 
studied and we found less than one-half percent swine to be infected. 
Of interest, swine from farms that were certified brucellosis and 
pseudorabies free had virtually no reactive samples.  
It is my impression that most trichinellosis occurs in people who 
have eaten swine obtained from small, "back yard" growers who market 
meat locally.  Most of the recent outbreaks of trichinellosis have 
occurred in immigrants, usually from Asia, who have ingested 
traditionally prepared pork products.  There was a recent outbreak in 
Iowa amongst Vietnamese (I believe) who ate a traditional pork 
sausage.  This resulted in over 90 infections.  These large outbreaks 
are unusual since the pork products sold primarily in our supermarket 
chains are virtually free of the parasite.  Because of these small 
time operations, we still must cook pork products to 140F or greater.
Annie K. Prestwood
Parasitology Dept
College of Veterinary Medicine
The University of Georgia
Athens, GA 
prestwood.a at calc.vet.uga.edu

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