| frequency and risk factors for toxoplasmosis in ovines of various regions of the state of colima, mexico. | infection of ewes by toxoplasma gondii may induce abortions, thus it has consequences for sheep production. colima, western state of mexico, has favourable climatic conditions for transmission and both domestic and wild cats live there. the aim of this study was to determine the frequency of specific antibodies in sheep from the coast, a mountain, and a hill of colima. serum samples from 351 sheep were tested by a previously standardized indirect elisa. the frequency of infection was estimated a ... | 2008 | 18801208 |