Colony opacity, hemadsorption, hemolysis, and mitogenicity are not associated with virulence of Mycoplasma pulmonis.
Davidson MK, Ross SE, Lindsey JR, Cassell GH. Colony opacity, hemadsorption, hemolysis, and mitogenicity are not associated with virulence of Mycoplasma pulmonis. Infect Immun. 1988 Aug; 56(8):2169-73.