Reports at 3rd Symposium on Some Problems in the Field of Comparative Ophthalmology
Pink Eye in Graging Cattle
1984 Volume 3 Pages 7-12
Details
1984 Volume 3 Pages 7-12
There was the first occurrence of IBK in cattle imported from USA to breeding farm of Aomori in 1970. Since then, the occurrences of the disease had been recognized in 16 prefectures of Japan in 1972.
The prevalence of IBK in an area contaminated by the causative agent of the disease was investigated clinically, bacteriologically and pathologically. In some farms of Aomori, M. bovis, the causative agent of IBK, was frequently isolated from the nasal and ocular swabs of cattle suffering from IBK or those from the apparently healthy cattle. Furthermore, it was observed that the disease spread from the farm where the disease was firstly observed by OKA (1970) to the neighbouring farms.
These results indicated that the main route of such endemic outbreak of this disease as mentioned above must be the transportation of cattle with or without symptoms from the original herds contaminated with M. bovis to the other herds. However, the role of insects concerning spread of this disease could not be neglected.
