What are the underlying pathogenic mechanisms of rheumatic fever in children?
May 05, 2022
Source: Cainiu Health
Dr. Xie Zixing
Introduction
Rheumatic fever in children involves two interrelated pathogenic mechanisms: molecular mimicry and autoimmune response. The human immune response against *Streptococcus* can cross-react immunologically with host tissues, leading to organ damage—this is the primary mechanism underlying rheumatic fever. The etiology of rheumatic fever in children comprises three factors: (1) the antigenicity of Group A hemolytic streptococci; (2) characteristics of susceptible tissues and organs; and (3) host susceptibility.
Rheumatic fever in children is one of the most common pediatric diseases. It is a particularly serious condition in children, primarily causing severe damage to the heart and joints, and later potentially affecting the brain and skin. What, then, are the underlying pathogenic mechanisms of rheumatic fever in children?
What Are the Pathogenic Mechanisms of Rheumatic Fever in Children?
Two interrelated pathogenic mechanisms underlie rheumatic fever in children: molecular mimicry and autoimmune response. The host’s immune response against streptococcal antigens may cross-react with human tissues, resulting in organ damage—this constitutes the primary mechanism of rheumatic fever. Streptococcal antigens—and self-antigens mimicking streptococcal antigens—can form circulating immune complexes that deposit in the synovium of joints, myocardium, and cardiac valves, thereby triggering rheumatic fever.
The etiology of rheumatic fever in children involves three key factors: (1) the antigenicity of Group A β-hemolytic streptococci; (2) inherent characteristics of susceptible tissues and organs; and (3) host susceptibility. Affected children may present with mild early symptoms such as pharyngitis, fever, or tonsillitis. During the intermediate stage, they may exhibit lethargy, fatigue, and anorexia. In the late stage, carditis and arthritis may develop. Therefore, prompt diagnosis and early treatment are essential upon detection of any abnormalities.
Parents should closely monitor their children in daily life and seek timely medical evaluation and treatment at the first sign of abnormality. Because early symptoms of rheumatic fever in children are often subtle yet may lead to extremely severe complications later, heightened vigilance is crucial to safeguarding children’s health. We hope this information has been helpful to you!
