Objective: To examine and validate microbial diagnostic
tests for etiological agent of tonsillo-pharyngitis in the study
population and to examine antibiotic sensitivity/resistance of
Streptococcus pyogenes to certain antimicrobial medications
using the disc diffusion method.
Method: The study was conducted on 60 children who
suffer from recurrent pharyngitis and 20 control healthy
children, selected from paediatric outpatient clinic of Benha
University, microbiologic laboratory investigations were
performed and throat swab obtained.
Result: The results of our study showed that streptococcal
pyogenes represents 18,7% of cases. They are sensitive to
penicillin, linezolid and vancomycin, resistant to streptomycin
and cephalexin.
Conclusion: Streptococcus pyogenes is a common bacterial
cause of pharyngitis representing 18,7% of cases and need
swab and culture for diagnosis to differentiate it from other
causes. Streptococcus pyogenes is highly sensitive to linezolid
(100%) vancomycin (100%) and penicillin (86,7%), and is
highly resistant to streptomycin (100%) and cephalexin (100%)