Contagious agalactia in a goat flock: somatic cell counts and bacteriological investigations of milk during two lactations.
43 goats were examined in their 2nd lactation; 42 of these were examined in their 1st lactation. After diagnosis of agalactia, antibiotic treatment and vaccination were carried out. 12 samples of milk were taken at intervals of about 30 days during the 2 lactations studied. Mycoplasma agalactiae alone was isolated from the milk of 16 goats and M. agalactiae together with another infective agent (Staphylococcus or Streptococcus, in 1 or more milk samples) was isolated in 27 goats. The mean somatic cell count ranged from 627 000/ml to 10 126 000/ml in goats excreting only M. agalactiae and 770 000/ml to 10 836 000/ml in goats excreting M. agalactiae associated with other mastitis agents.