Mycoplasmas associated with bovine conjunctivitis and keratoconjunctivitis.
Two separate herds of fattening calves had sudden outbreaks of ocular disease with profuse lacrimation. The disease resembled the early stage of infectious bovine keratoconjunctivitis but after a few days clinical signs of bronchopneumonia appeared. Mycoplasma (M.) bovigenitalium, M. bovirhinis and bovine herpes virus 1 were isolated from conjunctival swabs. M. bovigenitalium was found in the pneumonic lungs of dead calves in one of the herds. M. bovoculi was isolated from a cow with chronic keratoconjunctivitis, housed with affected calves. Mycoplasmas were not isolated from ocular swabs of six bulls originating from a Reproductive Centre with temporary occurrence of unilateral serous conjunctivitis resistant to antibiotic therapy.