Two weeks old white lohman male chickens were infected with a single dose of sporulated oocysts suspension of Eimeria tenella in potassium dichromate.
Pathogenicity of this parasite and its effect on packed cell volume (PCV) and growth rate of infected and control birds were assesed using 40.000 sporulated occysts/bird. Chemotherapeutic trails indicated the efficacy of both Baycox (Bayer) and Sofravitaminee - (Distrivet) in the treatment and control of coccidiosis in chickens in Egypt. This is due to their out standing efficacy, short period of administration and growth promoting character.