Wassink, L A Observations on mouse-infective stocks of Cowdria ruminantium: attempts to demonstrate antigenic changes of the Kwanyanga stock in mice. [electronic resource] - Research in veterinary science Jul 1986 - 98-101 p. digital Publication Type: Journal Article ISSN: 0034-5288 Subjects--Topical Terms: AnimalsAntigens, Bacterial--immunologyGoats--microbiologyHeartwater Disease--immunologyMiceRickettsiaceae--immunologyVirulence