| antigenic relationships of moraxella bovis isolates recovered from outbreaks of infectious bovine keratoconjunctivitis in argentina, brazil, and uruguay between 1983 and 2000. | cross-reactivity indices (cris) of 28 isolates of moraxella bovis recovered from outbreaks of infectious bovine keratoconjunctivitis in argentina (a, 11 isolates), brazil (b, 7), and uruguay (u, 10) between 1983 and 2000 were estimated. hyperimmune sera were produced in rabbits and antibody titres determined with each isolate. isolates showing cris3 70 were placed in the same group. group i had 13 isolates (a, 1; b, 6; u, 6); group ii had 6 isolates (a, 4; u, 2); groups iii, iv, and v had 2 isol ... | 2003 | 14620871 |