The enzyme, Pronase B, was used to extract the C carbohydrates of betahemolytic streptococci for serological grouping. Reference strains of streptococci, groups A through N, were accurately grouped by using this extraction method. Of the beta-hemolytic streptococci isolated from patients' cultures, 1,197 were classified as either group A or not group A by this method. There was 100% correlation...

The trypsinized cell walls of Group C hemolytic streptococci are composed of the specific carbohydrate antigen and a mucopeptide matrix. Certain phage resistant strains of Group C streptococci, isolated from organisms which survive exposure to Group C bacteriophage also possess carbohydrate and mucopeptide fractions, but the carbohydrate gives a precipitin reaction with Group A-variant antiseru...

1. No connection can be demonstrated between grouping of non-hemolytic streptococci based upon fermentation reactions, and grouping based upon immunological reactions. 2. A classification of non-hemolytic streptococci can be effected by studying the complement fixation reactions between the streptococci and their antisera. 3. The arrangement of the streptococci in such a classification depends ...

streptococcuscus beta hemolytic group a is the most important pathogen causing which may lead to purulent and non purulent angina. rheumatic fever is the most important complication that is the cause of 30% to 40% of cardiac disease and disablement. this study was performed to evaluate prevalence of streptococcuscus beta hemolytic group a and estimate role of clinical findings in children with ...

1. Blood cultures from 25 cases of acute rheumatic fever were negative for non-hemolytic streptococci of both the alpha and gamma types. 2. Non-hemolytic (gamma type) streptococci were frequently recovered from the throats of patients with this disease. 3. Similar organisms were recovered just as frequently from the throats of normal individuals. 4. Although these non-hemolytic streptococci wer...

Introduction: Hemolytic streptococci are one of the most frequent human pathogens capable of producing a variety of diseases ranging from pharyngitis, impetigo, to more severe and life threatening diseases like Toxic Shock Syndrome, neonatal sepsis, pneumonia and meningitis. Though they are still susceptible to commonly used antibiotics, resistance is increasingly reported. Materials and Method...

A serological investigation has suggested that Legionella pneumophila may be associated with sore throat in adults. In a study of 177 adults and children with acute pharyngitis, Legionella species were not isolated from pharyngeal cultures, which utilized selective and nonselective buffered charcoal-yeast extract media. Group A beta-hemolytic streptococci were isolated from 14 percent of the 17...