Metabolic Studies of a Non-hemolytic Streptococcus

Studies on Hemolytic Streptococci: II. Streptococcus pyogenes.

Studies on a Non-hemolytic Streptococcus Isolated from the Respiratory Tract of Human Beings

The results of studies on the antigenic structure and immunological specificity of a non-hemolytic streptococcus, designated streptococcus MG, are described. Evidence is presented to show that this microorganism possesses a capsule and that this structure contains a polysaccharide antigen which is responsible for the type specific serological reactions obtained with streptococcus MG.

Studies on the Hemolytic Streptococcus of Human Origin

1. Four common variants of the hemolytic streptococcus of human origin have been described. These have been designated the F, M, attenuated M, and C variants. 2. The F and M variants only have been isolated from the blood stream in streptococcal infections. Only the M, however, has any primary virulence for the mouse. 3. Both these variants resist phagocytosis in human blood under suitable cond...

Non-hemolytic group B streptococcus as a cause of chemotherapy port infection

Lancefield Group B Streptococci (GBS) are common causes of infection in adults with diabetes as well as a classical cause of perinatal meningitis. The organism is classically a beta-hemolytic streptococcus. We present an unusual case of human infection by a phenotypically rare manifestation of GBS, in which a chemotherapy port exhibited bacteremia of an organism without hemolysis (so-called gam...

A Study of Experimental Non-hemolytic Streptococcus Lesions in Vitally Stained Rabbits

1. Repeated injections into rabbits of non-hemolytic streptococci isolated from human cases of infectious endocarditis or rheumatic fever will produce an acute arthritis in the rabbit similar in most respects to the arthritis of acute rheumatism. 2. Microscopical sections of the joints show a gradual transition from an acute exudative inflammation to advanced organization. 3. Endocarditis and p...