Mouse pathogenicity of Toxoplasma gondii isolated from a goat.

Characteristics of Toxoplasma gondii (strain GT-1) isolated from skeletal muscle of a goat are described. One oocyst, bradyzoite, or tachyzoite of GT-1 strain was lethal to mice. Toxoplasma tachyzoites were found in the peritoneal exudates and in the lungs 9 to 34 days after infection in mice inoculated intraperitoneally with tissues infected with strain GT-1.