Overview of the experimental infections with M. agalactiae strain PG2 and NifS mutants in lactating ewes using the subcutaneous route.

aMean mycoplasma CFUs inoculated to each experimental group;bnumber of animals with reduced milk production;cnumber of animals with at least one milk sample found positive for M. agalactiae;dnumber of animals that developed a serological response to M. agalactiae;enumber of animals with at least one lymph node found positive for M. agalactiae (the lymph nodes analyzed are indicated in Fig. 2);fnumber of animals with subclinical mammary infections with Escherichia coli or coagulase-negative Staphylococci.