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.
1 The signs are very similar for tonsillitis that is caused by a virus and tonsillitis that is caused by bacteria. 2  It is more likely to be a virus if there are other signs of a 'cold' such as runny nose, sore eyes and a cough.onsillitis is when there is an infection of the tonsils, usually caused by a virus. Only about 15% are caused by bacteria. The tonsils can become very large and sore during tonsillitis.