title: Propagation of Ecthyma contagiosum virus in avian tissues: electron microscopical evidence of virus multiplication.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D004474:Ecthyma, Contagious / Q000382:microbiology*; D008854:Microscopy, Electron; D011212:Poxviridae / Q000254:growth & development* / Q000302:isolation & purification; D012756:Sheep; D014776:Virus Cultivation