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Streptococcal Symptoms: Strep Throat, Scarlet Fever & More
Streptococcal symptoms include sore throat, fever, and skin rash. Learn when to seek medical advice and how infections are treated.
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Streptococcal symptoms include sore throat, fever, and skin rash. Learn when to seek medical advice and how infections are treated.
What are Streptococci?
Streptococci are gram-positive bacteria that can cause a wide range of infectious diseases in humans. Group A Streptococci (Streptococcus pyogenes) are among the most common, responsible for conditions such as strep throat (tonsillitis), scarlet fever, and skin infections. Streptococci spread through droplets or direct contact and most commonly affect children and adolescents, though adults can also be infected.
Common Symptoms of a Streptococcal Infection
Symptoms vary depending on the site of infection and the type of streptococci involved. The most important clinical presentations are outlined below:
Strep Throat (Streptococcal Tonsillitis)
- Sudden onset of severe sore throat
- High fever (often above 38.5 °C / 101.3 °F)
- Red, swollen tonsils, often with white or yellowish patches
- Difficulty swallowing
- Swollen lymph nodes in the neck
- Headache and general malaise
- Absence of cough (a key feature distinguishing strep from viral infections)
Scarlet Fever
- High fever and sore throat (similar to strep throat)
- Fine, sandpaper-like rash (typically starts on the trunk, spreading across the body)
- Strawberry tongue: initially coated white, later turning bright red and bumpy
- Pale area around the mouth (circumoral pallor)
- Skin peeling after the rash subsides, especially on hands and feet
Streptococcal Skin Infections
- Impetigo: crusty, oozing sores, commonly on the face
- Erysipelas: sharply demarcated, painful skin redness with swelling, often on the legs
- Necrotizing fasciitis: rare but life-threatening deep tissue infection with severe pain, swelling, and skin necrosis
Rare Severe Complications
- Streptococcal sepsis: fever, chills, circulatory failure
- Toxic shock syndrome: dizziness, fever, low blood pressure, organ failure
- Rheumatic fever: joint inflammation and heart complications as late consequences of untreated strep throat
- Glomerulonephritis: kidney damage following streptococcal infection
When to See a Doctor?
Seek medical attention promptly if you or your child experience any of the following:
- High fever (39 °C / 102.2 °F or above) or fever lasting more than 3 days
- Severe difficulty swallowing or breathing
- Extensive skin rash combined with fever
- Significant joint pain or swelling
- Signs of tonsillitis in children
Early diagnosis and treatment are essential to prevent complications such as rheumatic fever or kidney disease.
Diagnosis
A doctor can detect streptococcal infection using a rapid strep test (throat swab) or a bacterial culture. In cases with classic symptoms, a clinical diagnosis may also be made. Blood tests may reveal elevated inflammatory markers such as CRP and elevated white blood cell counts.
Treatment
Streptococcal infections are typically treated with antibiotics, most commonly penicillin or amoxicillin. For patients with a penicillin allergy, macrolides or cephalosporins are used as alternatives. It is important to complete the full course of antibiotics to prevent complications and stop the spread of infection. Supportive measures include rest, adequate fluid intake, and fever-reducing medications such as paracetamol or ibuprofen.
References
- Robert Koch Institute (RKI): Streptococcus pyogenes (Group A Streptococci). 2023. Available at: https://www.rki.de
- Mims, C. et al. - Medical Microbiology, 5th Edition. Elsevier, 2019.
- European Centre for Disease Prevention and Control (ECDC): Group A Streptococcal Disease. Available at: https://www.ecdc.europa.eu
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