Dr Andrew Bradley recently presented data at the British Mastitis Conference from three years of clinical and subclinical mastitis bacteriology covering more than 6000 submissions and more than 500 UK herds. He noted that the aetiology (or cause) of mastitis was very diverse for both clinical and subclinical samples, encompassing more than 100 different pathogens, predominantly environmental organisms. Contagious pathogens were still implicated in around 10% of submissions, particularly Staphylococcus aureus. Interestingly, penicillin resistance was identified in less than 15% of tested isolates of S. aureus, much lower than previously reported. The research summary is available here.

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