犊牛类圆线虫病调查

An Investigation on Strongyloides in Buffalo Calves

笔者１９８５～１９９３年对犊牛类圆线虫病作流行病调查，１８５０头水牛犊类圆线虫虫卵阳性率１８％，１７５头腹泻水牛犊阳性率１３．８％，１～１０日龄均为阴性，１１～９０日龄阳性率２３％，９１～１６１日龄阳性率１７％，１６１～３６０日供阳性率１４．６％；１～３月份阳性率１７％，４～８月份阳性率２０．５％，９～１２月份阳性率１２％。

The investigation was carried out from 1985 to 1993. The infection rate among 1850 heads of the animal were 18%; 175 heads of the calves that suffered from, catarrhal enteritis were 13.8%; calves at 1 to 10 days of age were nrgatiye; at 11 90.to 160 and 161 to 365 days of age were 23%, 17% and 14.6%, re,spectively. It was also investigated in different months as Jean.to Mar., Apr. to Aug. andSep. to Dec. and positive rates. were 17%,20.5% and 12%, respectively.