Soreness, Streptococcus Pyogenes, Tonsils, White blood cells, Toothache tree Root Cause of Disease Tonsillitis, or swelling of the tonsils, is usually caused by a viral infection. But it can also be caused by strep bacteria, Streptococcus pyogenes. Parents of young children are all too familiar with the symptoms of this type of tonsillitis, also known…
