Overview of the experimental infections with <i>M. agalactiae</i> 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.