Minimum inhibitory concentrations of different antibiotics for Pasteurella multocida, Pasteurella haemolytica Corynebacterium pyogenes of bovine origin, and therapeutic considerations

Abstract

A wide range of microorganisms with varying pathogenicity has been isolated from the lungs of cattle affected by enzootic bronchopneumonia (transport pneumonia, shipping fever); nevertheless there is no doubt that P. haemolytica and P. multocida are the main causes of this disease. In the advanced stage of the condition C. pyogenes is frequently also present as a secodary invader. It is therefore of practical and therapeutic significance to regularly review the sensitivity of these bacteria to the antibiotics available for the treatment of pneumonia.