Strep throat is caused by streptococcal (strep) bacteria, most often by group A beta-hemolytic streptococcus (GABS). Other types of strep that can sometimes infect the throat are groups C and G strep bacteria.
Sore throats are most commonly caused by Reference viral infections Opens New Window or other irritants such as smoke, allergies, dry air, or a throat injury, and not by a strep infection.
How the strep infection is spread
Strep throat can be passed from person to person. When a person infected with strep throat breathes, coughs, or sneezes, tiny droplets containing the strep bacteria are released into the air and are breathed in by other people.
|By:||Reference Healthwise Staff||Last Revised: Reference October 31, 2012|
|Medical Review:||Reference Kathleen Romito, MD - Family Medicine
Reference Donald R. Mintz, MD - Otolaryngology