3Nicholas R A J, Bashiruddin J B.Mycoplasma mycodies subsp.mycoides (small colony variant): the agent of contagious bovine pleuropneumonia and a member of the Mycoplasma mycodes duster [J], Journal of Copmarative Pathology, 1995, 113:1-27.
4Egwu G O, MPH D, Nicholoas R A J, et, al. Contagious Bovine PIeuropnermonia: An Update [J] .Veterinaty Bulletin, 1996 (66), 9: 875-888.
5Laak E A ter, Contagious bovine PIeropneumo mia : a review [J] .Veterinary puarterly, 1992, 14: 104-110.
6Howard C J, Goural RN.An electronmicroscopic examination of ceraain bovine mycoplasma staind with Rugheninm red and the demonstration of a eapsule on Mycoplasma dispar [J] .Journal of General Micyobiology, 1974, 83: 393-398.
7Provost A, Perreau P, Breard G, etal. Contagious bovine PIeuropneumoniaand. Revue Scientifipue et Technipue [J] .Office Interntion des Epi zooties, 1987, 6: 565-679.
8Regalla J. Epidemiological aspects of contagious bovine PIeuropneumonia in Portugal [J], Re spositorio do Laboratorio Nacionnal de Invesrti gacao Veterinaria, 1984, 16: 15-18.
9Windsor R S, Masiga W N.Investigations into the role of carrier animals in the spread of contagious pleuropneumonia [J] .rESEARCH IN vETERINARY sCIENCE, 1977, 23: 224-229.
10Miles R J. Cell nutrition and growth In: My coplasmas: Molecular Biology and pathogemesis [ J], American Scoiety for Microbiology, Washing ton DC, 1922, 23-40.