Incorporating neomycin and nalidixic acid into a blood-agar base resulted in a medium highly selective for beta-hemolytic streptococci under conditions in which detection of streptococcal colonies by conventional means would have been very difficult.

Although there is common agreement and occasionfal mention of the fact that nephritis once healed does not recur, there has been little evidence presented in the literature to substantiate this impression. Longcope (1) reports 4 cases out of a series of 24 with healed acute nephritis in whom beta hemolytic streptococci were found subsequently. Two of these, in a single throat culture each, reve...

Here we present a rare case of infective endocarditis (IE) with Streptococcus canis and Chiari network in an 85 year old female living multiple dogs open skin lower extremity predisposing her to bacteremia. Underlying abnormalities the cardiac chambers such as predisposes higher incidence bacterial seeding causing IE. A is usually asymptomatic no clinical significance but can worsen prognosis I...

The clinical need to rapidly and correctly differentiate beta-hemolytic streptococci into Lancefield groups has prompted the development of commercially available rapid agglutination techniques. A modified Streptex (Wellcome Diagnostics, Research Triangle Park, N.C.) technique and the PathoDx latex Strep Grouping Kit (Diagnostic Products Corporation, Los Angeles, Calif.) technique were applied ...

1. Rabbits were rendered very hypersensitive by relatively small doses of green streptococci given intracutaneously, and somewhat less hypersensitive by similar doses of heat-killed vaccine prepared from hemolytic streptococci. 2. Animals receiving the same doses intravenously gave, upon subsequent testing, lesions slightly more marked than normal controls; but these lesions were qualitatively ...

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...