棘球属的种内变异现已得到广泛的承认并已鉴定了许多虫株同时描述了它们的特征。在这些虫株中有1株适应于牛(称牛株),在许多特征方面该株与寄生于其他家养中间宿主的虫株有明显的不同,包括续绦期好寄生的部位,在终宿主体内生长迅速,成虫的形态学和可溶性蛋白质的谱型。除瑞士外,在欧洲还没有证实牛株的存在,虽然流行病学的迹象提示细粒棘球绦虫牛株同样存在于比利时、联邦行德国和民主德国,仅在南非以其稀有的和独特的形态学为根据已鉴定了牛株的存在,然而,通过对原 Intra-species variation in Echinacea has now been widely recognized and many of the strains have been identified that characterize them simultaneously. One of these strains is adapted to cattle (called cattle), which differs markedly from those parasitized in other domestic intermediate hosts in many features, including the site of the parasitized spermatozoa, In vivo rapid growth, adult morphology and soluble protein profiles. In addition to Switzerland, the presence of cattle strains has not been confirmed in Europe, although epidemiological indications suggest that E.granosus also exists in Belgium, the Federal Republic of Germany and the Democratic Republic of Germany, only in South Africa for its rare and unique Morphology was based on the presence of cattle strains that have been identified, however, by the original