| toxoplasma gondii isolates from free-range chickens from the northeast region of brazil. | the prevalence of toxoplasma gondii in free-ranging chickens is a good indicator of the prevalence of t. gondii oocysts in the soil because chickens feed from the ground. the prevalence of t. gondii in 152 free-range chickens (gallus domesticus) from 22 municipalities in 7 northeastern states (pernambuco, rio grande do norte, maranhão, bahia, ceará, sergipe, and alagoas) of brazil was determined. antibodies to t. gondii were assayed by the modified agglutination test (mat); 81 (53.3 %) chickens ... | 2009 | 18578589 |