نتایج جستجو برای: hemolytic streptococci
تعداد نتایج: 24680 فیلتر نتایج به سال:
Skin and Soft Tissue Infections (SSTI) resulting from cat bites most commonly occur due to Pasteurella infection. However, other pathogens such as Β-Hemolytic Streptococci
An improved method is described for preparing the enzyme which hydrolyzes the polysaccharide acid contained in vitreous humor, umbilical cord, synovial fluid, and the mucoid phase of group A hemolytic streptococci. Preparations have been obtained from pneumococci, group A hemolytic streptococci, Clostridium welchii, and from splenic tissue, which display the same specific activity. Evidence is ...
The applicability to the non-hemolytic streptococci of the technique used for the extraction of a soluble precipitating substance from the hemolytic streptococci is demonstrated. With this substance as antigen, it is demonstrated by means of precipitation and complement fixation that the non-hemolytic streptococci form an antigenically distinct, but entirely heterogeneous group. Such cross-reac...
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...
preterm premature rupture of membrane(PPROM)is one of the serious problems during pregnancy.the aim of this study was to determine the probable relation between group B streptococal and anaerobic infections and PPROM.for this porpust 100 pregnant women with preterm rupture of membrane were selected.in the case group the prevalence of B-hemolytic streptococcal and anaerobic microorganisms was de...
The bacteriophages of ~-hemolytic streptococci studied by Evans (1-4) were classified into several races or types. I t is clear from this early work that the phages demonstrated some degree of specificity for streptococcal groups. For instance, a bacteriophage which lysed almost all group C streptococci did not lyse group A streptococci. However, much of this work was done prior to the serologi...
INTRODUCTION Studies on the carriage rate of beta-hemolytic streptococci among children form an important component of public health practice to prevent disease complications such as rheumatic fever/rheumatic heart disease, nephritis, and other local or systemic infections. METHODOLOGY Throat swabs collected from asymptomatic schoolchildren were inoculated into appropriate media for isolation...
The taxonomy of streptococci has undergone major changes during the last two decades. The present classification is based on both phenotypic and genotypic data. Phylogenetic classification of streptococci is based on 16S rRNA sequences [1], and it forms the backbone of the overall classification system of streptococci. Phenotypic properties are also important, especially for clinical microbiolo...
1. Thirteen strains of hemolytic streptococci isolated from patients with acute rheumatic fever did not show any evidence of being related serologically. 2. Strains of hemolytic streptococci exist which, although identical by the agglutination test, do not show complete reciprocal agglutinin absorption. Sera prepared from such related strains may show some protective power in mice against anoth...
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