| seroprevalence of and risk factors for toxoplasma gondii in the us swine herd using sera collected during the national animal health monitoring survey (swine 2006). | the united states department of agriculture (usda) initiated the national animal health monitoring system (nahms) in 1983 to collect, analyse and disseminate data on animal health, management and productivity in us domestic livestock populations, including swine. the programme includes an on-farm serological sampling component which can be used to monitor seroprevalence of various pathogens, including toxoplasma gondii. the purpose of this study was to determine the seroprevalence of t. gondii i ... | 2010 | 19744304 |
| enzootic toxoplasmosis in sheep in north-central united states. | of 1,564 serum samples from adult ewes from 33 farms in iowa, minnesota, south dakota, kansas, and nebraska where toxoplasmosis-induced ovine abortions had been diagnosed, 65.5% were found positive for toxoplasma gondii antibodies using the modified agglutination test. toxoplasma gondii antibody titers of ewes were: less than 64 (34.5%), 64 (14.9%), 256 (22.0%), 1,024 (14.5%), and greater than 4,096 (13.8%). thus, 28.3% of sheep had high titers (greater than 1,024) indicating recently acquired t ... | 1989 | 2795369 |
| prevalence of agglutinating antibodies to toxoplasma gondii in adult and fetal mule deer (odocoileus hemionus) from nebraska. | toxoplasma gondii is an apicomplexan parasite of mammals and birds. herbivores acquire postnatal infection by ingesting oocysts from contaminated food or water. toxoplasma gondii infection is common in white-tailed deer, odocoileus virginianus, but little is known about the prevalence of infection in mule deer, o. hemionus. we examined sera from 89 mule deer from nebraska for agglutinating antibodies to t. gondii using the modified direct agglutination test (mat) with formalin-fixed tachyzoites ... | 2005 | 16539039 |