Getting a Strep Test
Getting a strep test will help you to know if you are sick or not. You can get a rapid strep test, an antigen detection strep test, or a throat culture. Choosing the right one will depend on your personal needs.
Antigen detection test
Detecting the presence of group A streptococci (GAS) in a throat sample is an important step in diagnosing strep throat. Rapid antigen detection tests can identify the presence of group A streptococci in a swab in minutes.
The group A streptococcus bacteria are known to cause a number of infections including strep throat, scarlet fever, pneumonia, and ear infection. These infections can be caused by a number of different strains of bacteria.
A number of clinical laboratories now perform molecular testing to detect the genetic material of group A strep bacteria in a throat swab. The test involves the use of nucleic acid sequences associated with genes unique to S pyogenes bacteria.
Lateral-flow immunoassays are one of the more commonly used forms of rapid strep tests. The swab sample is collected and then mixed with a coated antibody that is specific for the carbohydrate cell wall antigen of group A streptococci.
The swab sample is then applied to a strip of nitrocellulose film. If the test was performed correctly, a colored line should appear in the control region. If not, the test is negative.
The BD Veritor System is a lateral flow immunoassay combined with an optical reader. It costs $300. The test is used for screening and diagnosis of strep throat and bacterial pharyngitis. It has an accuracy rate of 95%-99%. The sensitivity of the BD Veritor system is 104-105 colony-forming units per mL.
Several new rapid strep tests have appeared on the market in recent years. These include the QuickVue Dipstick Strep A and DIAQUICK Strep A Blue Dipstick. The DIAQUICK test has a lower diagnostic sensitivity, but a higher sensitivity for identifying weak positives.
The Alere i Strep A test is a PCR-type test. It consists of a sterile swab and a cartridge containing three drops of the sample. It is billed under CPT code 87651. The test is categorized as a “molecular” test, which means it produces results on an attached LCD screen in eight minutes.
Compared to the traditional lateral-flow immunoassay, the Alere i Strep A test has a higher reimbursement. It is billed under a separate CPT code, which gives it a higher reimbursement rate.
A throat culture is a laboratory test that can help your doctor identify strep bacteria that cause strep throat. The test can be used to diagnose strep throat and find the best antibiotic for the infection.
Throat cultures are used for kids with streptococcal pharyngitis, which is a common bacterial infection. The swab is rubbed on the back of the tonsils to look for the presence of strep bacteria. If the swab is positive for the bacteria, your child will have strep throat. However, if the swab is negative, your child may have a virus.
During the procedure, your child will need to lie on a table and have his mouth open wide. You should also avoid using antiseptic mouthwash before the procedure. This can affect the results.
A doctor will then collect a sample of cells from the back of the throat. These are added to a special reagent that promotes the growth of the germs. The sample will be placed in a specialized container. The bacteria can then be examined using a microscope.
Usually, the test will take a few days to complete. If your child is diagnosed with strep throat, the doctor will be able to recommend a treatment plan. He or she may prescribe antibiotics to prevent serious complications. The antibiotic can be started as soon as possible, as the infection can be dangerous if left untreated.
A throat culture will also help your doctor find the source of the infection. When your child is sick, he or she can pass the bacteria on through coughing, sharing, or sneezing. The throat culture is a fast way to determine the source of your child’s illness.
Unlike the rapid strep test, a throat culture takes a few days to complete. During the process, your child may gag or feel a little sore. If he or she has a positive result, your doctor will contact you. Often, a doctor will perform a second swab. This can be done in the office or sent to the laboratory.
Depending on how many cultures are needed, the results can be ready in a day or two. It can also take a week or more.
Rapid strep test
Using a rapid strep test is important for detecting a sore throat. It is a quick and convenient way to determine if you have strep throat, a mild to moderate illness that is highly contagious.
Strep throat is an infection of the tonsils, the back of the throat, that is caused by group A streptococcus bacteria. These bacteria cause a range of symptoms such as runny nose, cough, and fever. It can also lead to pneumonia and abscesses. The bacteria are often passed on to others through respiratory droplets in the air.
A rapid strep test is a very simple procedure that uses a cotton swab to collect a sample of the secretions in the back of the throat. The swab is rubbed against the back of the throat, just above the tonsils. This may cause the gag reflex, so it is best to avoid cheeks during the swab.
The sample is placed into a small plastic tube that contains sodium nitrite. It takes about 5 to 10 minutes to process the test. A positive result indicates that the person has group A Streptococcus, which can cause strep throat. It is treated with antibiotics. Taking antibiotics is important because it will shorten the illness and prevent the bacteria from spreading.
Rapid strep tests are commonly used in medical offices. The results are usually available within hours to a few days. However, they are not a substitute for other testing procedures.
A throat culture is another common test for strep throat. It is more expensive, but it gives a better diagnosis. A throat culture is more accurate than a rapid strep test. It may also be used to diagnose glomerulonephritis, rheumatic fever, and other bacterial diseases. It is best to get a throat culture if you have an acute strep throat infection.
Depending on the provider, a special swab will be used for a throat culture. It is rubbed against the back of the tonsils and collected. The secretions are then analyzed in the lab. A negative result means that no bacteria were found in the swab.
Treatment of strep throat
Using a strep test can help diagnose a sore throat. A doctor may use a swab to take a sample of mucous and bacteria from the back of your throat. This test can find the bacteria that cause strep throat in minutes. If the swab is negative, the doctor will have to do a throat culture. The throat culture is more accurate and gives a better diagnosis than a rapid test.
Using antibiotics to treat strep throat is important to prevent complications and lessen the severity of the infection. It can also reduce the risk of spreading the bacteria to others.
Symptoms of strep throat include a sore throat, fever, and chills. They are usually present within a few days of being infected, but can also last longer. They can affect people of all ages.
To avoid getting strep throat, wash your hands often and stay away from people who are infected. You can also protect yourself from infection by covering your mouth when coughing. If you have a fever, you should also rest and drink plenty of fluids.
If you have strep throat, your doctor will likely prescribe an antibiotic. These medications kill the bacteria that are causing the infection. This will make the symptoms go away more quickly and will reduce the risk of spreading the infection. These medicines are commonly taken for ten days. If you are allergic to penicillin, you may be given another type of antibiotic.
If the strep test is positive, your healthcare provider will probably prescribe oral antibiotics. These medications work well on strep bacteria and have few serious side effects. They can also prevent complications like rheumatic fever.
If your strep test is positive, you will need to take antibiotics for a full ten days to get rid of the bacteria. If you are still sick, you should remain home for at least a day to recover. If you are feeling better, you can return to school. However, it is not recommended that you return until the fever has gone away.
Your doctor will test other family members for strep throat, too. If you are allergic to penicillin, your healthcare provider will order a different antibiotic.
Health A to Z. (n.d.). HSE.ie. https://www2.hse.ie/az/
U.S. National Library of Medicine. (n.d.). https://www.ncbi.nlm.nih.gov/
Directory Health Topics. (n.d.). https://www.healthline.com/directory/topics
Health A-Z. (2022, April 26). Verywell Health. https://www.verywellhealth.com/health-a-z-4014770
Harvard Health. (2015, November 17). Health A to Z. https://www.health.harvard.edu/health-a-to-z
Health Conditions A-Z Sitemap. (n.d.). EverydayHealth.com. https://www.everydayhealth.com/conditions/