Letter: Virus-like particles in calves' faeces.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D003967:Diarrhea / Q000382:microbiology / Q000662:veterinary*; D001908:Diarrhea Viruses, Bovine Viral / Q000302:isolation & purification; D005243:Feces / Q000382:microbiology*; D008854:Microscopy, Electron; D009975:Orthomyxoviridae / Q000302:isolation & purification; D014780:Viruses / Q000302:isolation & purification*