[Study of the effect of egg white and thiamine on coccidiosis in chickens caused by E. tenella].

Studied was the effect of tiamin at the rate of 50 mg/kg mixture and white of egg in ratios of 25 and 50 per cent to the feed on the course of coccidiosis in chickens caused by Eimeria tenella. It was found that those of the birds that were offered 25 per cent white of egg and tiamin in a dose of 100 mg per kg exhibited more severe signs of coccidiosis had more pronounced morphologic changes with a higher mortality rate and the amount of the oocysts shed was higher than the same indices in birds having received the vitamin at the rate of 50 mg per kg and white of egg in a ration of 50 per cent to the feed. The increase of white of egg up to 50 per cent led to a lower oocyst production, however, still the latter was higher than in the control birds that were not given white of eggs and vitamin. Cyclicity was observed as well as explosive shedding of oocysts, which was associated with the physiology of the caecal intestines and with the biology of the parasite.