The Relationship Between Different Types of Streptococci and Pharyngotonsillitis: A Systematic Review
Journal Title: Otolaryngology – Open Journal - Year 2016, Vol 2, Issue 2
Abstract
Introduction: Streptococci were initially viewed by Louis Pasteur in 1879. Brown, in 1919, created the first systematized classification of streptococci in α, β and γ. Rebecca Lancefield contributed for knowledge of streptococcal polysaccharides discovering groups and M cell wall protein. Streptococci are gram positive, catalase and oxidase negative. Streptococci related to pathogenesis of acute sore throat are Streptococcus β-hemolytic of the groups A, B, C, F and G. Objective: Our objective was to make a review of the different types of streptococcus that can cause infection in the oropharynx. Review: Streptococcus pyogenes is belonging to the Lancefield grouping. Skin and mucous membranes of humans are the only known reservoir in the nature of streptococcus group A. Streptococcus of Group B (SGB) was originally isolated by Nocard in 1887. The primary habitat of these bacteria is the human colon, although it may colonize the oropharynx and especially, the vagina. For this reason, in mid-1960, the SGB has become a major cause of perinatal bacterial infection, including bacteremia and urinary tract infection in pregnant women. Group C is involved in purulent pharyngitis outbreaks. According to Fox et al, Streptococcus anginosus is the most common isolate β-hemolytic group C in the oropharynx. Streptococcus Group C (SGC) is reported as “pyogenes-like” because it shares important virulence factors such as hemolysins, extracellular enzymes and M proteins as well as the SGA. Conclusion: We conclude that it’s important to have knowledge about the different types of streptococci to better treat patients with sore throats and problems associated with this condition.
Authors and Affiliations
Sydney C. Leão
Keywords
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- EP ID EP546622
- DOI 10.17140/OTLOJ-2-112
- Views 132
- Downloads 0
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