Strep Throat: Causes, Symptoms, Treatment (original) (raw)
- Introduction
- Causes
- Contagious
- Common Signs/Symptoms
- Other Signs/Symptoms
- Infants/Kids
- Diagnosis
- Treatment
- Home Remedies
- OTC Medications
- Antibiotics
- Complications
- Prevention
- FAQs
What is strep throat?
Strep throat is a bacterial infection of the soft palate and tonsillar region. Microbiologists identify the member of the Streptococcus bacterial family that causes strep throat as "GAS" (group A, beta-hemolytic, Streptococcus pyogenes).
Strep throat makes your throat feel very sore and scratchy. The most common symptoms experienced by people with strep throat include:
- Sore throat
- Difficulty swallowing
- Red, swollen, and tender tonsils
- White patches or yellow streaks of pus in throat or tonsils
- Small red spots on the roof of the mouth
- Stomach pain
- Nausea and vomiting
- Scarlet fever (fever with red skin rash) in children
- Fever over 101 F
- Headaches and body aches
- Tiredness
- Loss of appetite
Due to the overlap in symptoms, strep throat may be mistaken for a regular sore throat caused by the common cold. The key difference is that strep throat typically has a sudden onset with more severe symptoms, whereas a sore throat from a common cold usually develops gradually over a day or two.
Who gets strep throat?
Strep throat is most common in young children and adolescents, but it can also occur in toddlers and adults. Strep throat is highly contagious and it is present most commonly in the community during the winter months. Symptoms and physical signs of strep throat may vary depending upon the age of the person infected.
What causes strep throat?
Strep throat is caused by a type of bacteria known as Streptococcus pyogenes, or group A Streptococcus. Once the bacteria enter the body, they settle and multiply in the throat and nose, leading to infection and sore throat symptoms. These bacteria are highly contagious and can spread easily through airborne droplets from coughing or sneezing by an infected person. Additionally, strep throat can be transmitted by touching infected surfaces or objects, followed by touching the mouth or nose, such as through sharing food, drinks, or utensils with an infected person. The infection is more likely to spread in settings where people are in close proximity, such as schools or day care centers.
Antibiotics can be used to treat strep throat, but it is crucial to begin treatment as soon as possible. If left untreated, strep throat can lead to complications including ear infections, sinus infections, or more serious conditions like rheumatic fever, which can harm the heart.
Is strep throat contagious?
Strep throat is highly contagious and is most commonly spread via direct person-to-person contact.
- The incubation period (the time it takes from exposure to the infection to the appearance of symptoms of strep throat) for strep throat is two to five days.
- Passage of airborne droplets and/or saliva from the infected individual to another is the most likely mechanism of contracting strep throat. Close quarters (such as the home, classroom, day care centers, and college dorms) provide an ideal environment for the passage of strep bacteria from one person to another.
- The risk of contracting a strep throat infection is approximately 40% in household environments.
- Most infectious disease specialists believe that a patient is no longer contagious after 24 hours of effective antibiotic therapy.
- The spread of strep bacteria via food-borne transmission is less common than a direct person-to-person exchange of droplets or saliva.
- The exact likelihood of developing strep throat from family pets is unknown, but most experts believe it is minimal.
How long does strep throat last?
Strep throat will usually get better on its own within three to seven days; however, you may start feeling better within a day or two after antibiotics are started. Strep throat remains contagious for the first 24 hours after starting antibiotics, so it is recommended that people stay home from work or school to avoid spreading the infection.
QUESTION Just about any painful sore throat is caused by strep. See Answer
What are the common signs and symptoms of strep throat?
Signs of strep throat are not unique — many viral infections (which cause the majority of sore throats) can have identical signs and symptoms as a group A strep (GAS) infection. Typically, older children and adolescents will experience symptoms such as:
- Fever (generally 102 F [38.8 C] and higher)
- Sore throat (may vary from mild to moderate in severity)
- Headache
- Upset stomach with nausea, occasionally severe enough to cause vomiting
Symptoms such as a runny nose, cough, hoarse voice, muscle aches, diarrhea, and oral blisters are generally not seen with a strep throat infection. These symptoms usually indicate a sore throat caused by a virus.
Adults with strep throat may have milder symptoms that may not prompt a medical evaluation unless an exposure history to strep throat is known.
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What are other signs and symptoms of strep throat?
What does strep throat look like? Other signs and symptoms of a strep throat infection may include:
- Redness of the soft palate, uvula (the "punching bag" structure hanging from the back of the soft palate), and tonsils. Commonly, the tonsils may have a bumpy look on their surface, somewhat like a golf ball
- White or yellow-colored spots on the tonsils (tonsillar exudate, or pus)
- Petechiae (look like 1-2 mm bright red "dots" and represent ruptured capillaries) scattered on the soft palate
- Enlarged and tender neck lymph nodes (also known as lymph glands)
- A diffuse rash over the torso and groin region. The classic description of this rash is that it looks like "goose bumps on a moderate sunburn". The presence of a strep infection and this specific rash is termed scarlet fever. This diagnosis does not imply a more severe strep infection or any change in prognosis or management. The rash is not contagious. Some individuals who develop scarlet fever may also experience peeling of the skin of the fingertip pads.
While most patients with strep throat will experience these signs and symptoms, not all will necessarily be present in each individual.
What are the signs and symptoms of strep throat in infants and toddlers?
The symptoms above are seen in those most likely to have a strep throat infection, including older children and teenagers. However, other age groups may experience some different symptoms with a strep throat infection.
- Infants with strep throat more commonly have a thick nasal discharge, low-grade fever (< 101 degrees F [38.33 degrees C]), reduction in appetite, and fussiness.
- Toddlers (children from one to three years of age) with strep throat may complain of a sore throat and a show a subsequent decrease in appetite, as well as swollen lymph nodes in the front of the neck beneath the mandible (lower jaw bone).
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What tests diagnose strep throat?
There are two common tests used to diagnose strep throat: the rapid strep test (RADT) and traditional throat culture.
Rapid strep test (RADT)
- Many medical offices, clinics, and hospital emergency departments use a rapid strep test (RADT, or rapid antigen detection test) to diagnose strep throat.
- A throat swab is obtained from the back of the throat and tonsils, and a RADT "kit" is employed to help determine the presence or absence of the strep bacteria.
- The turnaround time for the results of the test is generally 10 minutes.
- RADT tests are about 70%-95% accurate in determining the presence of strep bacteria.
- Most guidelines recommend that a negative rapid strep test be confirmed with a throat culture, which can take a few days to get the results.
- Antibiotic treatment prior to obtaining a throat swab for strep bacteria can interfere with throat culture results and thus the ability to correctly diagnose and treat a strep throat infection. Antibiotic treatment prior to a rapid strep test is less likely to have a false negative result since the test is designed to document the presence or absence of the GAS bacteria. Residual dead bacteria in the patient may allow a positive result.
Throat culture
The traditional test, a throat culture, involves obtaining a swab from the back of the throat and tonsils. It takes approximately 24 to 48 hours to determine the presence or absence of the group A strep bacteria. This test is typically more accurate in diagnosing strep throat than the rapid strep test.
Blood tests to check for a history of strep infection
The rapid strep and throat culture tests are designed to determine whether an individual currently has a strep throat infection. Sometimes, it may be necessary to determine whether a patient has had a recent history of a strep infection. In that case, two blood tests are available:
- ASO (antistreptolysin O) titer
- Anti-DNase titer
The antibodies that these tests are sensitive to are not commonly present until a few weeks following an acute strep infection. These tests may be ordered when evaluating a patient who may have developed delayed complications (such as rheumatic fever or glomerulonephritis) after a strep throat infection.
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What is the treatment for strep throat?
Strep throat treatments include the use of antibiotics, over-the-counter medications, and home remedies for the reduction of symptoms and signs.
What natural and home remedies help soothe strep throat pain?
Several home remedies may be used to reduce the symptoms of strep throat. They may be used whether the patient has strep throat or a viral cause of their illness. These remedies should not be used instead of a complete course of antibiotics if a strep infection is being treated. Home remedies to soothe symptoms of strep throat include:
- Saltwater gargle: mix ¼ to ½ teaspoon with 8 ounces of warm water. Young children may accidentally swallow the solution instead of gargling it and should thus avoid this approach.
- Throat lozenges may be sucked on to reduce the symptoms of pain or throat dryness. Some lozenges contain topical anesthetics. Very young children should not be given throat lozenges, which may be a choking hazard.
- Throat sprays that contain topical pain relievers (benzocaine, phenol) may be used to relieve sore throat pain, though lozenges often provide more long-lasting relief.
- Hot or cold foods and drinks: Ice cream, smoothies, popsicles, cold drinks, warm (not hot) broth-based soup, and warm tea with honey may help soothe the sore throat. Honey should be avoided in infants less than 1 year of age because of their increased likelihood of botulinum toxicity and paralysis.
IMAGES Strep Throat (Treatment, Causes, Home Remedies) See a picture of strep throat and other oral health conditions See Images What over-the-counter (OTC) medication soothes strep throat pain?
Several OTC medications can be used to lower the fever and provide pain relief for the sore throat. They include:
- acetaminophen (Tylenol) and
- nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen (Advil and Motrin).
Aspirin should not be used in children or adolescents because of its association with Reye syndrome.
What antibiotics are prescribed to treat strep throat?
Antibiotics provide the mainstay for successfully treating a strep throat infection.
- The group A strep bacteria are generally susceptible to the penicillin family, for example,
- amoxicillin (Amoxil), and
- the cephalosporin family, for example, cephalexin (Keflex), cefprozil (Cefzil), cefdinir (Omnicef), and others.
- Members of the macrolide family, such as erythromycin (E-mycin), azithromycin (Zithromax), and clarithromycin (Biaxin), generally are felt to be less effective than the other two classes of antibiotics but are used in individuals with moderate penicillin or cephalosporin allergy. If such a patient cannot tolerate the macrolide family, clindamycin (Cleocin) is an alternative and very effective antibiotic option.
- Regardless of what antibiotic is prescribed, it is important to finish the entire course of the antibiotic. Most patients will experience a rapid reduction in signs and symptoms within 24 to 48 hours of starting antibiotic therapy.
- Viral throat infections do not require antibiotics since they provide no benefit.
Is it safe to take antibiotics for strep throat during pregnancy?
If a woman contracts strep throat during pregnancy, the same types of antibiotics are typically used for treatment. All penicillin-type and cephalosporin-type antibiotics are considered safe for pregnant women. Because fever is a common symptom of strep throat, pregnant women are advised to take fever-reducing medications such as acetaminophen (Tylenol). Aspirin and NSAIDs should be avoided during pregnancy. Consult your doctor if you are pregnant and you think you have strep throat, and follow your doctor’s instructions for medication use.
Does strep throat go away on its own?
Strep throat can go away on its own, which means the body may eventually fight off the infection. However, this process can take longer and carries risks. Without treatment, strep throat can last three to seven days, but during this time, the person remains contagious and may experience prolonged discomfort.
Can strep throat heal itself?
While strep throat can potentially heal without medical intervention, it is important to note that untreated strep throat poses significant risks. It can cause serious complications, such as rheumatic fever (which can affect the heart) and post-streptococcal glomerulonephritis (which can damage the kidneys). Antibiotic treatment not only helps speed up recovery but also reduces the risk of complications and prevents the infection from spreading to others. So, while strep throat can heal on its own, it is safer and recommended to treat it with antibiotics.
Which specialties of doctors treat strep throat?
Strep throat is typically diagnosed and treated by a primary care provider (PCP) such as a family practitioner, an internist, or a child's pediatrician. If you go to a hospital’s emergency department, you will be seen by an emergency medicine specialist.
If you have recurring or chronic strep throat, you may be referred to an otolaryngologist, sometimes referred to as an ENT (ear, nose, and throat specialist) for treatment.
What are the potential complications of strep throat?
The possible complications of strep throat include the following:
- Middle ear infection (otitis media)
- Toxic shock syndrome (a very rare, severe complication that may result in multiple organ failure and sometimes death)
- Peritonsillar abscess or retropharyngeal abscess (a walled-off collection of pus) containing GAS bacteria, which typically requires drainage
- Acute rheumatic fever (ARF): While rare, this complication of an untreated or inadequately treated strep infection can have devastating and lifelong consequences. It is believed that due to incomplete eradication of the strep bacteria, certain GAS organisms cause an immune response, which may attack the joints leading to permanent arthritis. More concerning is the autoimmune response to the heart valves, which may damage them and result in heart failure. Many studies have shown that effective and appropriate antibiotic therapy for strep throat vastly reduces the likelihood of developing ARF.
- Glomerulonephritis: Similar to the abnormal immune response seen with ARF, antibodies may develop and damage the microscopic filters (glomeruli) of the kidney. This complication more commonly affects children between 7 and 10 years of age. While more common than acute rheumatic fever, glomerulonephritis has a less serious prognosis. Effective treatment exists and most children make a complete recovery and do not experience any long-term kidney damage. Unlike ARF, the development of glomerulonephritis is not necessarily prevented by effective antibiotic treatment.
- Pediatric autoimmune neuropsychiatric disorder associated with strep (PANDAS): Specialists debate the proposed link of GAS infection in children with the development and/or worsening of obsessive-compulsive behaviors or tic disorder (Tourette's syndrome in the extreme). One area being researched in this controversial condition is whether antibiotic therapy affects the development or severity of the disorder.
How can I prevent contracting strep throat?
There is no vaccine currently available to prevent strep throat, but there are several behaviors to lessen the likelihood of developing a strep throat infection. These include the following:
- Avoid people with sore throats, and especially those with documented strep throat, until they have taken antibiotics for more than 48 hours.
- Wash your hands frequently after using items that may harbor the group A strep bacteria (for example, dishes and utensils).
- Don't share food or drinks with a sick individual.
- Encourage ill individuals to cover their noses and mouths when they sneeze or cough.
Frequently asked questions
- What are the 4 symptoms of strep? The four most common symptoms of strep throat include:
- Sore throat: This is usually the most noticeable symptom, characterized by sudden, severe throat pain that can make swallowing difficult and painful.
- Fever: A sudden onset of a fever of 101 F (38.3 C) or higher is common with strep throat.
- Swollen lymph nodes: The lymph nodes in the neck become swollen and tender, and you may feel small, firm lumps on the sides of your neck.
- White or yellow spots on the tonsils: White or yellow patches or streaks on the tonsils may appear. These are pus pockets that form as your body fights the infection.
- Is lemon water good for strep throat? Lemon water may provide some soothing relief for strep throat and can help with hydration. Vitamin C in the lemon may help boost immunity; however, it does not cure strep throat. Lemon water should be used along with proper medical treatment, such as taking antibiotics as prescribed. Although lemon water can be a helpful home remedy to alleviate discomfort, taking too much lemon water may irritate your throat.
- What not to eat with strep throat: When you have strep throat, you must try to avoid eating the following foods, as they can irritate your throat:
- Does strep throat get worse at night? Yes, strep throat symptoms may feel worse at night. This is because lying down can cause mucus to pool in the throat, which increases irritation. Nighttime dehydration can make the throat feel drier and more painful. This may occur because your body's natural pain relief functions might be reduced at night.
Medically Reviewed on 8/28/2024
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