Serologic and histologic diagnosis of toxoplasmic abortions in sheep in Oregon

J. P. Dubey From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Agricultural Research Service, USDA, Beltsville Agricultural Research Center-East, Building 1040, Beltsville, MD 20705 (Dubey), and the Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97339 (Sonn, Hedstrom, Snyder, Lassen).

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R. J. Sonn From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Agricultural Research Service, USDA, Beltsville Agricultural Research Center-East, Building 1040, Beltsville, MD 20705 (Dubey), and the Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97339 (Sonn, Hedstrom, Snyder, Lassen).

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O. Hedstrom From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Agricultural Research Service, USDA, Beltsville Agricultural Research Center-East, Building 1040, Beltsville, MD 20705 (Dubey), and the Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97339 (Sonn, Hedstrom, Snyder, Lassen).

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S. P. Snyder From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Agricultural Research Service, USDA, Beltsville Agricultural Research Center-East, Building 1040, Beltsville, MD 20705 (Dubey), and the Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97339 (Sonn, Hedstrom, Snyder, Lassen).

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E. D. Lassen From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Agricultural Research Service, USDA, Beltsville Agricultural Research Center-East, Building 1040, Beltsville, MD 20705 (Dubey), and the Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97339 (Sonn, Hedstrom, Snyder, Lassen).

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Summary

Between 1983 and 1989, we examined 586 fetuses and dead lambs submitted to a diagnostic laboratory in Oregon. Toxoplasmosis was diagnosed in 74 (12.6%), campylobacteriosis in 89 (15.2%), chlamydiosis in 75 (12.8%), miscellaneous infections in 153 (26.1%), noninfectious causes in 37 (6.3%), and undetermined causes in 158 (27.0%). Detection of Toxoplasma gondii agglutinating antibodies (≥ 20) in body fluids or heart serum was considered specific for the diagnosis of toxoplasmosis in ovine fetuses or lambs. Toxoplasma gondii antibody titers (reciprocal) in 285 fluids from fetuses or dead lambs were < 20 (64.5%), 20 (4.5%), 40 (1.7%), 80 (0.7%), 160 (2.1%), 320 (1.7%), 640 (4.9%), 1,280 (2.8%), 2.560 (4.5%), 5,120 (3.8%), 10,240 (2.1%), and ≥ 20,480 (6.3%).

Summary

Between 1983 and 1989, we examined 586 fetuses and dead lambs submitted to a diagnostic laboratory in Oregon. Toxoplasmosis was diagnosed in 74 (12.6%), campylobacteriosis in 89 (15.2%), chlamydiosis in 75 (12.8%), miscellaneous infections in 153 (26.1%), noninfectious causes in 37 (6.3%), and undetermined causes in 158 (27.0%). Detection of Toxoplasma gondii agglutinating antibodies (≥ 20) in body fluids or heart serum was considered specific for the diagnosis of toxoplasmosis in ovine fetuses or lambs. Toxoplasma gondii antibody titers (reciprocal) in 285 fluids from fetuses or dead lambs were < 20 (64.5%), 20 (4.5%), 40 (1.7%), 80 (0.7%), 160 (2.1%), 320 (1.7%), 640 (4.9%), 1,280 (2.8%), 2.560 (4.5%), 5,120 (3.8%), 10,240 (2.1%), and ≥ 20,480 (6.3%).

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