Antibiotic susceptibility of Moraxella bovis recovered from outbreaks of Infectious Bovine Keratoconjunctivitis in Argentina, Brazil and Uruguay between 1974 and 2001

antibiotic susceptibility of thirty moraxella bovis strains recovered from outbreaks of infectious bovine keratoconjunctivitis (ibk) in argentina, brazil and uruguay between 1974 and 2001 was determined using the kirby-bauer and the minimal inhibitory concentration (mic) methods. our results suggest that most strains were susceptible to the antibiotics used in the treatment of ibk, and that the antibiotic susceptibility of m. bovis varied with the geographical region and period of recovery.