After host transfer,juveniles developed well and matured in the thoracic cavi- ties or lung worm cysts of dogs or cats,but some prematured worms were also detected.

• 童虫经宿主转换后 ,在犬、猫胸腔或肺虫囊内检获虫体 ,除部分为成熟前期虫体外 ,多数为含卵成虫。