Acute Fulminant Group A Beta-Hemolytic Streptococcus-Associated Carditis: A Case Report and Literature Review

Area of Science:

• Infectious Diseases
• Cardiology
• Rheumatology

Background:

• Group A beta-hemolytic streptococcus (GAS) pharyngitis can lead to serious complications, including acute rheumatic fever (ARF).
• ARF pathogenesis is theorized to involve molecular mimicry, where the immune system targets host tissues.
• Traditional diagnosis of ARF relies on serological markers like antistreptolysin O titer (ASOT), which may be negative in early stages.

Observation:

• A case report details a 23-year-old male with GAS pharyngitis presenting with fever, sore throat, and chest pain.
• Initial workup revealed elevated troponin I and positive Group A strep PCR, with echocardiography showing reduced left ventricular ejection fraction and regional wall motion abnormalities.
• Despite initial treatment with aspirin and NSAIDs, the patient's condition worsened, necessitating the addition of prednisone.

Findings:

• The patient showed improvement in clinical symptoms, EKG, and echocardiogram findings after initiating steroid therapy.
• This case highlights the potential for acute carditis to present concurrently with pharyngitis.
• The study suggests that advanced markers like PCR, troponin, and echocardiography can aid in the rapid diagnosis of GAS infections and potentially early-onset ARF.

Implications:

• Rapid diagnostic markers like PCR, troponin, and echocardiography offer a faster confirmation of GAS infection compared to traditional serology.
• These markers may facilitate earlier diagnosis and management of ARF, potentially preventing long-term cardiac complications.
• Further research into the utility of these acute markers in diagnosing early-onset ARF is warranted.