Definition

Strep throat is an infection of the pharynx (pronounced FAAR-ingks). The pharynx is the part of the throat that connects the mouth and the larynx (pronounced LAAR-ingks), or voice box. Strep throat is caused by a group of bacteria known as the streptococcal (pronounced strep-tuh-KOK-uhl) bacteria. If untreated, a strep throat can lead to serious complications, such as rheumatic fever (see rheumatic fever entry).

Description

Strep throat accounts for 5 to 10 percent of all sore throats. Anyone can get the disease but it is most common among school age children and certain groups of adults. Adults at higher risk include smokers, people who are unusually tired, and those who live in damp, crowded conditions.

Strep throat occurs most often between November and April. The disease passes directly from person to person and coughing, sneezing, or close contact can transfer it from one person to another. If...