title: Comparison of the virulence of various strains of Moraxella bovis.
abstract: The relative virulence of various strains of Moraxella bovis (M. bovis) was studied using the eyes of mice and cattle. The investigation consisted of three separate experiments. Experiments I and II involved a study on the effects of (1) different methods of growth and (2) serial blood agar passaging on the virulence of M. bovis. Experiment III involved a study on the relative virulence of different strains of M. bovis and M. bovis-like organisms. Strains of M. bovis and M. bovis-like organisms varied in their pathogenicity for mice. However, different methods for preparation of exposure cultures of M. bovis did not influence the disease produced.
mesh_terms: D000362:Agar; D000818:Animals; D001431:Bacteriological Techniques; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology; D003470:Culture Media; D005128:Eye Diseases / Q000382:microbiology / Q000662:veterinary; D005260:Female; D007239:Infections / Q000662:veterinary; D007637:Keratoconjunctivitis / Q000382:microbiology / Q000662:veterinary*; D051379:Mice; D009016:Moraxella / Q000254:growth & development / Q000302:isolation & purification / Q000472:pathogenicity*; D012376:Rodent Diseases / Q000382:microbiology; D014774:Virulence
chemical_list: D003470:Culture Media; D000362:Agar