Fig. 4

Somatic cell count in milk following quarters’ infusion with S. aureus BM1006. Somatic cell counts in composite milk and quarter milk following nasal immunization with FKSA or no immunization in the early stage of lactation, and mock-infusion with PBS or infusion with S. aureus BM1006 in the gland cistern. a Composite milk (three cows, n = 3). b Two quarters infused with S. aureus BM1006 in the gland cistern (six quarters, n = 6). c Two quarters mock-infused with PBS (six quarters, n = 6). Mean cell counts (± standard error) are shown. Black circles correspond to nasal immunization samples, white circles to non-immunization controls