Mice are susceptible to natural infections with streptococci and therefore can serve as suitable animal models to study experimental streptococcal infections. In an earlier study, we had shown the development of pharyngeal colonization, antibody response and histopathological changes in the heart following intranasal (IN) challenge with a rheumatogenic serotype of group A beta haemolytic strept...

OBJECTIVE To determine the validity of the rapid antigen test (RAT) OSOM StrepA Genzyme for the diagnosis of acute pharyngitis caused by group A beta-haemolytic strep (GABHS). DESIGN Diagnostic techniques survey. SETTING Urban primary care centre, Spain. PARTICIPANTS All patients over 14 years old seen in 6 surgeries with sore throat and 2 or more Centor criteria: pharyngotonsillar exudat...

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...

Mohammad-Saeed Sasan*1, MD; Fatemah Riyahi Zanian2, MS; Batol Birjandi3, MD; Mahbobe Naderinasab2, MD, PhD, and MohammadMahdi Ejtehadi2, PhD 1. Department of Pediatrics, Mashhad University of Medical Sciences, Mashhad, Iran 2. Department of Microbiology, Mashhad University of Medical Sciences, Mashhad, Iran 3. Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran Received: J...

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...

Studies using cultured cells have shown that gamma interferon (IFN-gamma) induces the expression of Fc gamma RI (the type I Fc receptor for IgG) on human polymorphonuclear neutrophils (PMN) and greatly increases the number of these receptors on human monocytes. Administration of rIFN-gamma in vivo also causes enhanced Fc gamma RI expression on these cell populations. Because streptococcal antig...

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...