ß-Lactam Failure in Treatment of Two Group G Streptococcus dysgalactiaesubsp. equisimilisPharyngitis Patients

ABSTRACTWe present two cases of exudative pharyngitis due to Streptococcus dysgalactiaesubsp. equisimilis, Lancefield group G. While the participation of this organism as an agent of pharyngitis is well documented, we focus on failure of beta-lactam therapy, a phenomenon that is well described for pharyngitis due to Streptococcus pyogenes. Therefore, these case reports add to our knowledge of pharyngitis caused by non-S. pyogenesstreptococci.