Echinococcus granulosus cysts: early development in vitro in the presence of serum from infected sheep.
D000818:Animals; D004443:Echinococcosis / Q000097:blood / Q000662:veterinary*; D004446:Echinococcus / Q000254:growth & development* / Q000276:immunology; D007114:Immunization; D012756:Sheep / Q000097:blood; D012757:Sheep Diseases / Q000097:blood*