cross-sectional study of streptococcus species in quarter milk samples of dairy cows in the canton of bern, switzerland.a total of 2538 quarter milk samples from 638 lactating dairy cows from 47 farms in the canton of bern, switzerland, were investigated for streptococci. a novel, simple and inexpensive laboratory method was used for the differentiation of streptococcus species, and a risk factor analysis was carried out. the prevalence in the quarter milk samples was 0.2 per cent for streptococcus agalactiae, 1.3 per cent for streptococcus uberis, 1.3 per cent for streptococcus dysgalactiae, 0.1 per cent for ent ...201020693505
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