Infectious bovine keratoconjunctivitis: An update

  • Annette O'Connor College of Veterinary Medicine, Michigan State University East Lansing, MI 48824
Keywords: pinkeye, Moraxella, infectious bovine keratoconjunctivitis


Infectious bovine keratoconjunctivitis (IBK, pinkeye) is cattle’s most common production-limiting disease and the most com­mon ocular disease. Despite being reported for many years, the epidemiology of IBK remains elusive. Moraxella bovis remains the only organism for which there is causal evidence. Moraxella bovoculi bacterins have been on the market for several years; however, they remain with a conditional licensed. None have been fully licensed today. Data from publicly available studies suggest that vaccine efficacy for IBK vaccines ranges from -30% to 30%, except one study published in 1976 with 32 animals that reported efficiency of ~60%. By comparison, the Moderna CO­VID-19 vaccine has a reported vaccine efficacy of 94%.

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