isolated at both first and second samplings. A quarter was
considered as infected with CNS if CNS were isolated at the
first sampling and if no pathogens or CNS were isolated at
the second sampling. A quarter was considered as infected
with a contagious major pathogen if S. aureus or Streptococcus
agalactiae was isolated at the first sampling and if
no pathogens, Corynebacterium bovis or CNS, or the same
major pathogen was isolated at the second sampling. A
quarter was considered as infected with an environmental
major pathogen if esculin-positive streptococci or Streptococcus
dysgalactiae was isolated at the first sampling and if