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Streptococcal pharyngitis

life science Maturity 7-9 Next article →

Strep throat is a common bacterial infection. It is also called streptococcal pharyngitis. This illness happens when germs infect the pharynx. The pharynx is the back of your throat. This infection is very common in children. It causes 15% to 40% of sore throats in kids. In adults, it causes 5% to 15% of sore throats.

The infection is caused by a germ called Streptococcus pyogenes. This germ belongs to a group called group A streptococcus. People are the main place these germs live in nature. The germs spread through tiny respiratory droplets. These droplets fly through the air when people talk, cough, or sneeze. You can also catch it by touching something with these droplets. Then, you might touch your eyes, nose, or mouth.

Symptoms usually start one to three days after you are exposed. Most people feel better in seven to ten days. Common signs include a sore throat and a fever. Your tonsils might look red or have white spots called exudates. You might also have swollen lymph nodes in your neck. Some people get a headache, nausea, or vomiting. A red rash that feels like sandpaper can appear. This specific rash is known as scarlet fever.

Doctors use special tests to find the germ. One way is a rapid antigen detection test, or RADT. This test is very quick to get results. Another way is a throat culture. This is considered the gold standard for diagnosis. A culture is very accurate, with a 90% to 95% success rate. Doctors use these tests to decide if you need medicine. They do not test children under age three unless a sibling is sick.

If a doctor confirms the infection, they may use antibiotics. In the United States, penicillin V is the main choice. Amoxicillin is often used in Europe. Antibiotics help reduce the risk of serious complications. One complication is rheumatic fever, which can affect the heart. Another is a peritonsillar abscess. To prevent getting sick, you should wash your hands often. You should also avoid sharing eating utensils with others.

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