[Use of the anticoccidial agent, tortrazuril (Baycox, Bayer) in coccidiosis in suckling pigs].

At present neonatal coccidiosis caused by Isospora suis is known to be an important disease in piglets. The coccidium I. suis was diagnosed as the causative agent of diarrhoeic disease in piglets on a large pig farm with continuous farrowing operation.

The influence of coccidiosis resistant, susceptible and unselected sires on progeny mortality after infection with Eimeria tenella.

After four generations of selection for resistance to E. tenella, resistant, unselected and susceptible, sires were mated to dams of an unselected population. Mortality from coccidiosis in their progeny following inoculation of every chick with 50,000 sporulated oocysts was only 3.