Strep A Test

What is a strep A test?

Group A Streptococcus, also known as group A strep, is a type of bacteria that often lives in the nose and throat. It causes strep throat and other infections. Strep throat is an infection that affects the throat and tonsils. You can get strep throat at any age, but it’s most common in children ages 5 to 15 years old.

The infection can spread from person to person through the air, for example from being close to someone who is coughing or sneezing. It can also spread when you touch something that has the bacteria on it and then touch your eyes, mouth, or nose. Another way you can get it is if you share a glass, straw, or utensils with someone who has the infection.

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The infection can spread more easily among people living together or in crowded places. Some people infected with group A strep do not have symptoms or seem sick. People who are sick with strep throat are more contagious than those who do not have symptoms.

Once you have been exposed to the group A strep bacteria, it usually takes two to five days before you start to feel sick.

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Strep throat can be easily treated with antibiotics. But if it’s not treated, strep throat can lead to serious health problems (complications). These include rheumatic fever, a disease that can damage the heart and joints, and glomerulonephritis, a type of kidney disease.

Strep A tests check for strep A infections. There are two types of strep A tests:

• Rapid strep test. This test looks for antigens to strep A. These antigens are substances in the Strep A bacteria that trigger your immune system to fight the bacteria. A rapid strep test can provide results in 10-20 minutes. If a rapid test is negative, but your health care provider thinks you or your child has strep throat, they may order a throat culture.
• Throat culture. This test looks for strep A bacteria. It provides a more accurate diagnosis than a rapid test, but it can take 24-48 hours to get results.

Other names: strep throat test, throat culture, group A Streptococcus (GAS) throat culture, rapid strep test, Streptococcus pyogenes

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