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Table 2 Number of intramammary infections (IMI) with clinical signs in seven dairy herds during a 20 month period

From: Mastitis diagnostics and performance monitoring: a practical approach

  Number of IMI Number of IMI with clinical signs
E. coli 105 99 (94%)
Staph. aureus 171 62 (36%)
Strep. dysgalactiae 80 52 (65%)
Strep. uberis 79 49 (62%)