a retrospective study of the occurrence of beta-haemolytic streptococci of various lancefield groups in routine cultures from the county of uppsala.during the months october to december of the years 1971-1974 the incidence of beta-haemolytic streptococci of the lancefield groups, a, b, c and g from patients in the county of uppsala was studied. the proportion of culture positive patients increased during the period studied from 7.2% to 13.7%. the increase was not only due to group a. in cultures from the respiratory tract the finding of group a streptococci increased from 4.1% to 10.7% and group c from 0.1% to 1.6%, while group b and g stre ...1976775623
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