Relation of Streptococcus Pyogenes tonsillitis isolate to antimicrobial agents and its infection treatment

Abstract

We reported the case of tonsillitis treatment in a 17-years-old boy with use of chemical non-antibiotic preparations, plant derived products and antibiotic benzathine phenoxymethylpenicillin. The antimicrobial agents for treatment were selected on the basis of their activity against a disease agent, the group A β-hemolytic strain Streptococcus pyogenes BS1 isolated from a patient. The bacterium was susceptible in vitro to β-lactams, with largest zones conditioned by penicillin G and benzathine phenoxymethylpenicillin discs, to fluoroquinolones and to cephems, with exception of cefazolin. Lincosamide clindamycin, macrolide spiramycin, aminoglycoside gentamicin, erythromycin, tetracycline and combination of sulfamethoxazole and trimethoprim were inactive against this bacterium. The Streptococcus pyogenes BS1 demonstrated intermediate susceptibility to the cephalosporin cephalexin, fluoroquinolone lomefloxacin and glycopeptide vancomycin. Non-antibiotic preparations were evaluated against Streptococcus pyogenes BS1 also. Among them “Stomatidin”, “Chlorophyllipt”, and phages of “Pyofag” were more effective than “Decatylen”, “Decasan” and “Furadonin” in vitro. The antimicrobial applications of “Stomatidin”, “Chlorophyllipt” and phages of “Pyofag” in the patient were less effective compared to the result of antibiotic benzathine phenoxymethylpenicillin treatment. Complete recovery of the patient was achieved with use of this antibiotic and Calendula flower extract as an local anti-inflammatory agent.