Acute Pharyngitis

Written by Medicover Team and Medically Reviewed by Dr Sateesh Pydi , General Medicine

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Acute pharyngitis is an inflammation of the pharynx, the area of the throat behind the mouth and nasal cavity. It is commonly known as a sore throat and may occur due to viral, bacterial, or environmental factors. The condition often causes throat irritation, discomfort while swallowing, and other systemic symptoms.

Are there Different Types of Acute Pharyngitis?

Acute pharyngitis is commonly classified based on the underlying cause of infection.

Viral pharyngitis caused by viruses such as rhinovirus, coronavirus, adenovirus, influenza virus, and Epstein-Barr virus
Bacterial pharyngitis mainly caused by Streptococcus pyogenes (group A streptococcus)
Non-infectious pharyngitis caused by allergies, irritants, or environmental factors

What Are the Symptoms of Acute Pharyngitis?

The symptoms of acute pharyngitis can vary depending on the underlying cause. However, most people experience throat irritation along with other signs of infection.

Sore throat that may range from mild irritation to severe pain
Fever, especially in bacterial infections
Headache and general body discomfort
Swollen lymph nodes in the neck
Tonsillar exudates or white patches on the tonsils
Difficulty swallowing or throat redness

What Causes Acute Pharyngitis?

Viral Acute Pharyngitis

Viral infections are responsible for the majority of acute pharyngitis cases. Common viruses that cause pharyngitis include:

Rhinovirus: ften accountable for the common cold.
Coronavirus: nother common cause of colds.
Adenovirus: an cause conjunctivitis in addition to pharyngitis.
Influenza virus: Causes the flu, which can involve pharyngitis.
Epstein-Barr virus (EBV): auses infectious mononucleosis, often leading to severe pharyngitis.

Bacterial Acute Pharyngitis

Although less common than viral infections, bacterial infections can also cause acute pharyngitis. The most notable bacterial cause is Streptococcus pyogenes, also known as group A streptococcus (GAS). Other bacterial pathogens include:

Group C and G streptococci
Neisseria gonorrhoeae: A sexually transmitted infection
Corynebacterium diphtheriae: The bacterium responsible for diphtheria

Environmental and Other Causes

Non-infectious factors can also contribute to acute pharyngitis. These include:

Allergies: Pollen, dust, and pet dander can lead to throat inflammation.
Irritants: Smoking, pollution, and chemical fumes can irritate the throat.
Dry air: Particularly in winter, it can cause throat dryness and irritation.

When should you see a Doctor for Acute Pharyngitis?

While many cases improve within a few days, medical attention may be necessary if symptoms persist or worsen.

Severe throat pain that does not improve within a few days
Difficulty swallowing or breathing
High fever or persistent fever
Swollen lymph nodes that remain painful
White patches or pus on the tonsils
Symptoms lasting longer than a week

A healthcare provider such as a general physician or an ENT specialist can evaluate symptoms and recommend appropriate treatment.

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How is Acute Pharyngitis Diagnosed?

Doctors diagnose acute pharyngitis through physical examination and laboratory tests to determine whether the infection is viral or bacterial.

Clinical Examination

A thorough clinical examination is essential for diagnosing acute pharyngitis. Physicians look for signs such as:

Redness and swelling of the pharynx
Tonsillar exudates
Palpable lymph nodes

Laboratory Tests

To differentiate between viral and bacterial pharyngitis, several laboratory tests can be performed:

Rapid Antigen Detection Test (RADT): Quick test to detect group A streptococcus.
Throat Culture: More accurate but takes longer, used to confirm RADT results.
Polymerase Chain Reaction (PCR): Can identify viral pathogens.

What are the Treatment Options for Acute Pharyngitis?

Treatment depends on the cause of the infection. Viral infections usually resolve with supportive care, while bacterial infections may require antibiotics.

Symptomatic Treatment

For both viral and bacterial pharyngitis, symptomatic treatment aims to relieve pain and fever. Common measures include:

Analgesics: Such as acetaminophen or ibuprofen.
Throat lozenges: To soothe the throat.
Hydration: Drinking plenty of fluids to keep the throat moist.

Antibiotic Treatment

Antibiotics are prescribed only for bacterial pharyngitis, particularly for infections caused by group A streptococcus. Common antibiotics include:

Penicillin: The first-line treatment.
Amoxicillin: Often used as an alternative.
Macrolides: Such as erythromycin, for patients allergic to penicillin.

Avoiding Antibiotic Overuse

To prevent antibiotic resistance, it is crucial to avoid unnecessary antibiotic use. Antibiotics should not be prescribed for viral pharyngitis.

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What is the Recovery Process for Acute Pharyngitis?

Recovery from acute pharyngitis depends on the underlying cause. Viral infections usually improve within a few days, while bacterial infections may require medication.

Most viral infections resolve within 3 to 7 days with supportive care
Antibiotic treatment helps bacterial infections improve within a few days
Drinking warm fluids and maintaining hydration helps soothe the throat
Adequate rest supports faster recovery
Avoiding irritants such as smoking and pollution helps prevent further throat irritation

Complications of Acute Pharyngitis

Rheumatic Fever

Untreated group A streptococcal pharyngitis can lead to rheumatic fever, a serious condition that can damage the heart valves.

Post-Streptococcal Glomerulonephritis

This is a kidney disease that can occur after a streptococcal infection. It is characterized by hematuria, proteinuria, and hypertension.

Peritonsillar Abscess

A complication where pus collects around the tonsils, requiring drainage and antibiotics.

Preventive Measures

Hygiene Practices

Good hygiene practices can significantly reduce the risk of acute pharyngitis. These include:

Handwashing: Regular and thorough handwashing can prevent the spread of infections.
Avoiding Close Contact: Staying away from infected individuals.