 Shortly after this, in 1863, "E. multilocularis" was identified by Rudolf Leuckart.Then, during the early to mid 1900s, the more distinct features of "E. granulosus" and "E. multilocularis", their life cycles and how they cause disease were more fully described as more and more people began researching and performing experiments and studies.While "E. granulosus" and "E. multilocularis" were both linked to human echinococcosis before or shortly after the 20th century, it was not until the mid 1900s that "E. oligarthrus" and "E. vogeli" were identified as and shown as being causes of human echinococcosis.