Detección de los genes de las exotoxinas pirogénicas SpeA, SpeB y SpeC en cepas chilenas de streptococcus pyogenes y su asociación con la clínica / Detection of pyrogenic exotoxin SpeA, SpeB and SpeC genes in chilean streptococci isolates and their association with clinical manifestations
Rev. méd. Chile
;
128(1): 27-34, ene. 2000. tab, graf
Artículo
en Español
| LILACS
| ID: lil-258084
ABSTRACT
Background:
The virulence of Streptococcus pyogenes is determined by a variety of structural molecules, toxins and complex enzymes. Pyrogenic exotoxins cause fever, erythematous reactions, cytotoxic and immunological effects.Aim:
To assess the frequency of speA, speB and speC genes in Chilean Streptococcus pyogenes strains and their association with the invasiveness of infections. Material andmethods:
The genes for pyrogenic exotoxins SpeA, SpeB and SpeC were determined by polymerase chain reactions in 114 strains of group A Streptococcus pyogenes isolated from Chilean patients with invasive or non invasive infections.Results:
The gene for SpeA was present in 30.7 percent of isolates, the gene for SpeB was present in 69.3 percent and the gen for SpeC in 44.7 percent of isolates. The gene for SpeA was present in 20 of 33 invasive infections and in 15 of 81 non invasive infections (p <0.0001). On the contrary, the gene for SpeC was present in 11 of 33 invasive infections and in 41 of 81 non invasive infections (p <0.05). The frequency of speB was similar in invasive and non invasive infections.Conclusions:
There is a clear relationship between the presence of SpeA genes and the severity of infections caused by Streptococcus pyogenes
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Streptococcus pyogenes
/
Técnicas In Vitro
Tipo de estudio:
Estudio diagnóstico
/
Factores de riesgo
País/Región como asunto:
America del Sur
/
Chile
Idioma:
Español
Revista:
Rev. méd. Chile
Asunto de la revista:
Medicina
Año:
2000
Tipo del documento:
Artículo
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