Résumé
Group A Streptococci (GAS) are one of the common pathogens responsible for causing tonsillitis and pharyngitis in both children and young adults. The asymptomatic pharyngeal carriage of GAS in children may lead to spread of respiratory infection in the community. Children aged 5 to 15 years with no signs and symptoms of upper respiratory tract infections and no history of antibiotic therapy within last two weeks were included in study. Throat swabs collected were cultured on blood agar. GAS was identified by conventional method and serogrouped using latex agglutination assay. GAS was isolated from 7 children, out of 250 children. The carrier rate was 3.6% which correlated well with other South Asian studies. Our study showed the importance of surveillance programme to keep carriers in check.
Sujets)
État de porteur sain/épidémiologie , État de porteur sain/microbiologie , Enfant , Hémolyse , Humains , Prévalence , Établissements scolaires , Infections à streptocoques/épidémiologie , Infections à streptocoques/microbiologie , Streptococcus/classification , Streptococcus pyogenes/épidémiologie , Streptococcus pyogenes/étiologie , Streptococcus pyogenes/microbiologieRésumé
Human skin contains precipitinogens and complement dependent antigen. Almost all Streptococcus pyogenes strains isolated from skin lesions [97%] possess cross complement dependent antigen which is reactive with the skin antiserum. A smaller number of the nasal strains and to a lesser extent the throat strains of the some patients [75% and 37.5% respectively] possess a similar antigen. Streptococcus group A strains isolated from nose [25%] and from tonsils [6%] of asymptomatic children contained the same complement dependent antigen Group C streptococci staphylococcus aureus and strains of gram negative bacilli all lacked this antigen. The antigen is a trypsin sensitive protein