Is Rheumatic Fever contagious?

Rheumatic fever is not contagious, meaning you cannot catch it from someone who currently has the condition. While the initial bacterial infection that triggers rheumatic fever is transmissible, the resulting inflammatory disease itself is an autoimmune response that cannot be spread between people.

Is Rheumatic Fever caused by an infection?

Although rheumatic fever is not contagious, it is a complication of an infection caused by Group A Streptococcus bacteria, typically manifesting as "strep throat" or scarlet fever. If these infections are not treated promptly with antibiotics, the body's immune system may mistakenly attack its own healthy tissues, specifically in the heart, joints, brain, and skin. This process characterizes rheumatic fever as an autoimmune inflammatory condition rather than an infectious one.

Why do people mistake Rheumatic Fever for a contagious illness?

The confusion stems from the fact that the underlying trigger—the streptococcal bacteria—is highly contagious. In crowded living environments or schools, multiple people may contract strep throat simultaneously. If several individuals in a household develop rheumatic fever, it is usually because they were all exposed to the same source of the bacteria, not because they transmitted the inflammatory condition to one another.

What factors increase the risk of developing Rheumatic Fever?

While the condition cannot be passed from person to person, certain environmental and biological factors influence who develops it following a strep infection:

• Inadequate antibiotic treatment: Failing to complete a full course of penicillin or other prescribed antibiotics for strep throat significantly increases risk.


• Age: It most commonly affects children between the ages of 5 and 15.


• Environmental conditions: Overcrowding and limited access to healthcare are key drivers of transmission for the initial strep bacteria.


• Genetic predisposition: Some families may have a higher susceptibility to the autoimmune response that causes rheumatic fever.

Next steps

• Consult a pediatrician or infectious disease specialist if a child has a persistent sore throat or fever.


• Ensure the full course of antibiotics is completed exactly as prescribed to prevent rheumatic fever.


• Join the Rheumatic Fever community at DiseaseMaps.org to connect with others who have shared their experiences.

Medical disclaimer: This content is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD)


• World Health Organization (WHO) - Rheumatic Heart Disease Fact Sheets


• Centers for Disease Control and Prevention (CDC) - Rheumatic Fever Information


• American Heart Association (AHA) - Prevention of Rheumatic Fever