Infection and transmission of Brucella by ectoparasites.
D000028:Abortion, Induced; D000034:Abortion, Veterinary; D000818:Animals; D002002:Brucella; D005260:Female; D009521:Newcastle Disease; D010271:Parasites; D012756:Sheep; D014780:Viruses
ABORTION/infectious; NEWCASTLE DISEASE/experimental; PARASITES/transmission of disease; VIRUSES/diseases--in animals