Strep Throat
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Strep Throat

(Bacterial Sore Throat)

En Español (Spanish Version)


Strep throat is a bacterial throat infection.

Sore Throat Due to Inflammation

© 2008 Nucleus Medical Art, Inc.


Strep throat is caused by the bacterium Streptococcus pyogenes . It is spread by airborne droplets:

  • Coughing and sneezing of people who have strep throat
  • Touching a contaminated surface and then touching your eyes, nose, or mouth

Risk Factors

A risk factor is something that increases your chance of getting a disease or condition.

Risk factors for strep throat include:

  • Age: school-aged children
  • Family member or friend who has strep throat


Symptoms of strep throat include:

  • Red, sore throat with white patches
  • Painful, difficult swallowing
  • Chills
  • Headache
  • Swollen, sore glands in the neck
  • Fever
  • Nausea and possibly vomiting
  • Decreased appetite
  • Rash
  • Muscle aches, especially in the neck, and abdominal pains, especially in younger children
  • Fatigue


Your doctor will ask about your symptoms and medical history, and perform a physical exam. Tests to detect strep throat may be used and include:

  • Throat culture—Sample of throat secretions is cultured in the laboratory. It takes a few days to gets results.
  • Rapid antigen strep screen—The results are available in minutes. The test is based on detection of antigens; however, a negative test does not exclude the diagnosis of strep throat.
  • Rapid DNA test—Using DNA technology to detect strep throat, this test is as accurate as throat culture. The results are usually available in one day.

While only a, rapid DNA test or throat culture can confidently distinguish strep throats from those caused by virus infection, doctors make diagnosis and decide about treatment primarily by careful evaluation of symptoms and physical findings.


Antibiotic Medications

Almost all sore throats—including strep—will get better on their own in 7 to 10 days. Strep throat improves more rapidly with antibiotics than without, but antibiotics do not affect the healing of sore throats due to virus infection. Given as a pill or a shot, types of antibiotics include penicillin, amoxicillin, erythromycin, azithromycin, or cephalosporin antibiotics. Symptoms begin to disappear after only a few doses, but it is crucial that you finish the entire prescription.

Serious complications of undertreated strep throat include:

Antibiotics are typically given to prevent the complication of rheumatic fever from occurring after strep throat infection. In many communities, erythromycin is no longer reliably effective in treating strep throat or preventing rheumatic fever due to resistance of the bacteria.

Over-the-Counter Pain Medications

Acetaminophen or ibuprofen can help relieve sore throat and muscle aches and pains.

Note: Aspirin is not recommended for children with a current or recent viral infection. Check with your doctor before giving a child aspirin.


To reduce your chances of getting strep throat:

  • Wash your hands carefully.
  • Don't share beverages or food.


American Academy of Otolaryngology—Head and Neck Surgery


About Kids Health

BC Health Guide


American Academy of Otolaryngology–Head and Neck Surgery website. Available at: . Accessed October 12, 2005.

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Strep throat. Mayo Clinic website. Available at: . Accessed November 10, 2007.

Streptococcal pharyngitis. Dynamed website. Available at: . Accessed November 10, 2007.

Last reviewed November 2007 by Marcin Chwistek, MD

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.

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