MORPHOMETRIC STUDY OF EXPERIMENTALLY INDUCED STAPHYLOCOCCUS-BOVIS MASTITIS IN THE COW

  • 1 January 1979
    • journal article
    • research article
    • Vol. 40  (9) , 1294-1298
Abstract
Comparisons of bovine mammary tissue were made at 12 and 24 h after 5000 colony-forming units of S. aureus 305 was injected into the mammary parenchyma with control tissue from the contralateral udder half. A mild staphylococcal mastitis form was induced routinely. S. aureus was found in udder tissue removed centrally from the injection site. Varied tissue damage degrees were found in infected quarters from alveolar epithelium without damage (similar to control) to extremely swollen epithelium which were typical of cells undergoing disruption. Infected tissues frequently displayed areas of swollen stroma and diminished alveolar lumens. Cellular debris was often found in lumens and neutrophils frequently filled the alveolar lumen in areas of greatest damage. A parenchymal injection of bacteria induced early staphylococcal mastitis forms at the alveolar level.

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