Illustration: Drawing with word(s)/letter(s)/number(s) in Block form Attorney: Roger H. Bora Thompson Hine LLP 10050 Innovation Drive Suite 400, Miamisburg, OH 45342 Employee: Timothy J Finnegan
Tonsillitis is most often caused by common viruses, but bacterial infections can also be the cause.The most common bacterium causing tonsillitis is Streptococcus pyogenes (group A streptococcus), the bacterium that causes strep throat. Other strains of strep and other bacteria also may cause tonsillitis.onsillitis is most often caused by common viruses, but bacterial infections can also be the cause.
Bacterial and viral infections can cause tonsillitis. A common cause is Streptococcus (strep) bacteria. Other common causes include: 1  Adenoviruses. 2  Influenza virus. 3  Epstein-Barr virus.4  Parainfluenza viruses. 5  Enteroviruses. 6  Herpes simplex virus.he main symptoms of tonsillitis are inflammation and swelling of the tonsils, sometimes severe enough to block the airways. Other symptoms include: 1  Throat pain or tenderness. 2  Redness of the tonsils. 3  A white or yellow coating on the tonsils. 4  Painful blisters or ulcers on the throat.