About Pharyngitis: Causes
The acute type of pharyngitis is caused by a virus such as the cold virus or the 'flu virus 95% of the time. Strep throat causes pharyngitis and is caused by the bacteria known as Group A Streptococcus. There are other types of bacteria that cause pharyngitis, including Corynebacterium, Neisseria gonorrheae and Chlamydia pneumoniae. Approximately five percent of all cases of pharyngitis are caused by bacteria.
The chronic type of pharyngitis can be caused by smoking too many cigarettes or drinking too much alcohol. Sometimes it is caused by postnasal drip that results from chronic inflammation of the sinuses or nasal passages. Allergies may cause or contribute to these symptoms. Chronic pharyngitis may also be brought on by chronic cough and/or being constantly exposed to dusty air. Finally, one who constantly uses their voice in a loud manner may develop a chronic type of pharyngitis.