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26.04.10

Host response in bovine mastitis experimentally induced with Staphylococcus chromogenes

Experimental bovine mastitis models have been developed for many bovine mastitis pathogens (e.g., E. coli, S. aureus, S. uberis); however, none exists for coagulase-negative staphylococci (CNS). The host response to intramammary infection by S. chromogenes was investigated through experimental infection of one quarter of six Holstein-Friesian heifers with S. chromogenes. All cows developed mild mastitis characterized by swelling, hardness and heat in the infected quarter; only one cow exhibited abnormal milk. Milk production, on average, decreased just 16.3%. All cows except one eliminated infection within 14 days. SCC in the affected peaked at a lower level than SCC for other pathogens.

Ressources

Sawant, A.A., et al. 2009. Simojoki, H., et al. 2009. Host response in bovine mastitis experimentally induced with Staphylococcus chromogenes. Vet. Micro. 134 (1-2): 95-99