Introduction: The beta hemolytic Streptococci (SBH), particularly the group A (pyogenes) is the leading bacterial cause of sore throat that occurs primarily in the paediatric population. Objective: To evaluate the antimicrobial susceptibility of beta hemolytic Streptococcus from paediatric patients with pharyngitis, and infer the type of macrolide resistance mechanism. Material and methods: A t...

The CAMP (Christie-Atkins-Munch-Petersen) test is commonly used for the presumptive identification of Streptococcus agalactiae (Lancefield group B). Using 350 clinical isolates of beta-hemolytic streptococci, we compared a 30-min spot CAMP test with the standard overnight CAMP test and the Lancefield precipitin test. We found 99% agreement among all three tests for all streptococci tested. The ...

Oral Campylobacter species are rarely reported to cause extraoral infections. Here we present three cases of extraoral abscess caused by an oral Campylobacter sp. and a Streptococcus sp. The Campylobacter species were all isolated anaerobically and identified by sequencing analysis of the 16S rRNA gene. The cases included a breast abscess caused by Campylobacter rectus and a non-group A beta-he...

1. When a relatively avirulent strain of hemolytic streptococcus was injected into the skin of rabbits a considerable amount of skin sensitivity to streptococcus filtrate developed, and there was scant demonstrable immunity. 2. When the same strain of streptococcus was made highly virulent by repeated passages through rabbits, little sensitization and considerable immunity was produced. 3. Rabb...

Objective: To identify the prevalence of group A beta hemolytic streptococcus related pharyngitis in Pakistan. Study Design: Retrospective Place and Duration Study: Department ENT Head & Neck Surgery, Liaquat College Medicine Dentistry, Karachi from 1st July 2021 to 31st March 2022. Methodology: One hundred seventy patients who showed symptoms were enrolled. Two throat swabs taken where fir...

Beta-hemolysin production by group B streptococci (GBS) is speculated to be a major virulence factor of the organism. A virulent, beta-hemolytic group B streptococcus strain was mutagenized with the self-conjugative transposon Tn916 to derive isogenic strains with mutations only in the gene(s) responsible for beta-hemolysin biosynthesis. There was no significant difference between the virulence...

In a previous paper (Lewandowski and Stahly, 1944) it was shown that the growth rate of a group C hemolytic streptococcus, adapted to artificial media, became constant after a number of subcultures in an apparently favorable medium. It is the purpose of this paper to give a description of the materials and methods used and to present the growth rates of a group of strains maintained by passage ...

The goal.Studying the clinical course’s features of acute odontogenic inflammatory processes jaws in children, describing species composition pathogens, determination sensitivity to antibiotics various groups childhood. Materials and methods.The case histories 900 patients were analyzed, microbiological research methods carried out (microscopic examination samples with Gram staining, culture me...