Strep throat is a type throat infection that causes a sore throat. Although the term is commonly used, very few sore throats are strep throat.

Sore Throat Due to Inflammation
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Strep throat is caused by specific bacteria. The bacteria enter through inhaled air droplets and grow in the throat causing the infection and symptoms.

The strep bacteria is spread by airborne droplets, most often from coughs or sneezes of infected people or touching a contaminated surface then touching your eyes, nose, or mouth.