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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
severe group a streptococcal infections in uppsala county, sweden: clinical and molecular characterization of a case cluster from 2006 to 2007.this study describes a recent cluster of 30 patients (median age 52 years) with serious group a streptococcal (gas) infections in uppsala county, sweden, from december 2006 to may 2007. patients hospitalized with a severe gas infection, i.e. cases with either invasive gas (igas) disease or patients with a positive non-sterile site culture/rapid antigen test for gas and clinically considered as having a critical disease, were included in the study. common clinical presentations were skin and soft ...200919922064
epidemiological observations on streptococcus pyogenes serotype t1 in uppsala county, sweden 1989-1995.during the period 1989-1995, the t-type distribution pattern of streptococcus pyogenes pharyngeal isolates was compared with the annual incidence of culture-verified s. pyogenes bacteremias in uppsala county, sweden. an exceptional increase in the number of s. pyogenes bacteremias was seen in 1994. during the study period, the annual number of blood culture isolates was shown to correlate with the proportion of s. pyogenes serotype t1 among pharyngeal isolates.19968611189
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