Gibson T E, Everett G
Res Vet Sci. 1977 Sep;23(2):191-5.
An investigation was made to study the acquisition of infection with Ostertagia circumcincta by lambs on land carrying residual infection, infection following the spring rise and both infections. Dry weather in June modified the usual pattern of herbage larval infection by delaying the peak of larvae derived from residual infection and cutting out the first half of the diphasic peak normally associated with the spring rise. It is suggested that prediction of the time when damaging infections develop on the herbage may be possible by a study of meteorological observations.
开展了一项调查，以研究在存在残余感染的土地上，羔羊感染环形奥斯特他线虫的情况，春季感染高峰后的感染情况以及这两种感染情况。6月的干旱天气改变了牧草幼虫感染的通常模式，推迟了源自残余感染的幼虫高峰，并消除了通常与春季上升相关的双相高峰的前半部分。有人认为，通过研究气象观测，有可能预测牧草上有害感染发生的时间。
