BOVINE MYCOPLASMAL CONJUNCTIVITIS - EXPERIMENTAL REPRODUCTION AND CHARACTERIZATION OF THE DISEASE

  • 1 January 1980
    • journal article
    • research article
    • Vol. 70  (4) , 307-320
Abstract
Epizootic conjunctivitis was studied in 8 Iowa [USA] cattle herds. Mycoplasma bovoculi was isolated from the eyes of cattle in all affected herds and Ureaplasma sp. was isolated from the eyes in 3 herds. When either organism was experimentally inoculated into the conjunctival sac of healthy calves, conjunctivitis became apparent within 3-4 days after infection and persisted for more than 1 mo. Calves inoculated with M. bovoculi responded with mild localized conjunctivitis and serous lacrimation; calves inoculated with Ureaplasma sp. had diffuse conjunctivitis with watery lacrimation. With both microorganisms, the symptoms varied in intensity with peaks of recrudescence through the observation period. The microorganisms were recovered for periods of 1-2 mo. from the conjunctival mucosae of cattle undergoing natural or experimental infections.