Bovine streptococcal mastitis
- S. agalactiae, S. dysgalactiae and S. uberis primarily cause mastitis
- Also S. pyogenes, S. zooepidemicus and Enterococcus faecalis can be involved
- S. agalactiae colonises milk ducts causing persistent infections with acute outbreaks
- S. dysgalactiae found in the oral cavity and on the skin of the udder causes acute mastitis
- S. uberis inhabits normal skin, tonsils and vaginal mucosa, and causes mastitis without systemic signs
- Cause inflammation of mammary tissue and clots form in milk
- Milk samples are cultured on blood agar, Edward's medium and MacConkey agar for diagnosis