Seasonal and geographical changes of spontaneous XXXX in the Japanese newt Cynops pyrrhogaster.

@entity778 @entity5 @entity1185 @entity189 @entity272
The occurrence of spontaneous @entity272 in Japanese newts (Cynops pyrrhogaster) from Niigata prefecture in Northern Japan was monitored over four seasons covering a period of 2 years. Of 13,613 newts, 249 were found to @entity1185 . The percentage of newts with @entity1185 was highest in autumn, ranging from 1.93 to 5.45% of the total average. These values were more than four times as high as values obtained in the other three seasons (0.16 to 0.50%). A total of 12,167 newts were collected from their natural environment in 10 prefectures of Japan in the autumn of 1980 and 1981. Newts collected from the northern, seaside prefectures had @entity1185 rates (1.00 to 5.45%) than did newts from the Southern, Pacific Ocean prefectures of Japan (0 to 0.27%). Male and female newts were affected equally often by the @entity189 . @entity778 -like bodies, resembling @entity778 , were found in the cytoplasm of the @entity189 . These @entity778 -like bodies were not seen in the control epithelium of newts with normal skin and without @entity1185 or in nonaffected regions of newts with @entity1185 . It is suggested that @entity5 and @entity778 are causally related.
