Abstract
Epidemiological studies of coccidiosis were conducted in Japanese quail (Coturnix coturnix japonica) farms for 3 years.
The following results were obtained on 2, 630 quail groups in 56 quail farms during the period from July 1, 1969 to June end of 1972.
1) Eimeria was detected in 96.6% of the quail groups.
2) The intensity of the infection appeared independent on season factor.
3) The regional defferences of quail farms in term of Eimeria infection was not observed.
4) The lower viability of quail chicks in the farms, the higher OPG values were observed, and a correlation was found between the viability and the OPG values (γ=-0.504).
5) The egg production was also reduced by 18.9% following artificial infection with Eimeria at a dose of 2.88×105 per bird.
