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Journal of Wildlife Diseases, 33(2), 1997, pp. 267-270
© Wildlife Disease Association  1997
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Serologic survey for Toxoplasma gondii in grizzly bears from Alaska

RL Zarnke, JP Dubey, OC Kwok, and JM Ver Hoef


ABSTRACT

Blood samples were collected from 892 grizzly bears (Ursus arctos) in Alaska (USA) from 1973 to 1987. Sera were tested for evidence of exposure to Toxoplasma gondii by means of the modified agglutination test. Two hundred twenty sera (25%) had titers > or = 25, the minimum threshold titer. Six hundred seventy-two sera (75%) had titers < 25. Antibody prevalence ranged from 9% (18 positive of 196 tested) in southern areas to 37% (162 of 433 tested) in northern areas. There was no readily apparent explanation for these discrepancies in location-specific prevalence.




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Copyright © 1997 by the Wildlife Disease Association.