The Relationship Between Different Types of Streptococci and Pharyngotonsillitis: A Systematic Review.
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.
Our objective was to make a review of the different
types of streptococcus that can
cause infection in the oropharynx.
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 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.
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. Brown,
in 1919, created the first systematized classification of streptococci in
α, β and γ, from standard hemolysis checked on blood agar plates.
Otolaryngol Open J. 2016; 2(2): 47-50. doi: 10.17140/OTLOJ-2-112
