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1 December 2002 HIGH PREVALENCE OF VIABLE TOXOPLASMA GONDII INFECTION IN MARKET WEIGHT PIGS FROM A FARM IN MASSACHUSETTS
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Abstract

The ingestion of uncooked infected meat is considered important in the epidemiology of Toxoplasma gondii infection in humans and little is known of the prevalence of viable T. gondii in meat used for human consumption in the United States. In the present study, viable T. gondii was isolated from 51 out of 55 pigs destined for human consumption. Hearts and tongues (500 g) from fifty-five 6-mo-old pigs from a farm in Massachusetts were bioassayed for T. gondii by feeding them to T. gondii–free cats. Feces of these cats were examined for shedding of T. gondii oocysts. Fifty-one of 55 cats fed pig tissues each shed 25–810 million T. gondii oocysts in their feces. Two of these cats consumed tissues of pigs that were shown to be seronegative with the Sabin–Feldman dye test, the modified agglutination test, and the Western blot. Results indicate that until examination of meat for T. gondii infection is implemented in slaughterhouses, all meat should be cooked according to industry guidelines before human consumption.

J. P. Dubey, H. R. Gamble, D. Hill, C. Sreekumar, S. Romand, and P. Thulliez "HIGH PREVALENCE OF VIABLE TOXOPLASMA GONDII INFECTION IN MARKET WEIGHT PIGS FROM A FARM IN MASSACHUSETTS," Journal of Parasitology 88(6), 1234-1238, (1 December 2002). https://doi.org/10.1645/0022-3395(2002)088[1234:HPOVTG]2.0.CO;2
Received: 26 September 2002; Accepted: 1 October 2002; Published: 1 December 2002
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