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Myocarditis: a rare complication during Legionella infection

S Armengol1, C Domingo, E Mesalles

  • 1Servei de Cures Intensives, Hospital Universitari Germans Trías i Pujol, Badalona, Barcelona, Spain.

Insights

Legionella bacteria can affect the heart, causing cardiac legionellosis and myocarditis. This heart inflammation may be more common in Legionnaires

Area of Science:

  • Infectious Diseases
  • Cardiology
  • Microbiology

Background:

  • Legionella bacteria are known to cause systemic illness.
  • The clinical presentation of Legionnaires' disease has expanded.
  • Cardiac involvement in Legionella infections was first documented in 1981.

Observation:

  • Systemic manifestations are common in Legionella infections.
  • Cardiac legionellosis, specifically myocarditis, represents a recognized clinical entity.
  • Few cases of Legionnaires' disease-associated myocarditis have been reported historically.

Findings:

  • Myocardial involvement may occur in patients with Legionnaires' disease.
  • The frequency of cardiac legionellosis might be underestimated in the broader context of Legionnaires' disease.
  • Legionella can present with diverse clinical symptoms, including cardiac complications.

Implications:

  • Clinicians should consider cardiac involvement in Legionnaires' disease diagnosis.
  • Further research is warranted to determine the true prevalence of cardiac legionellosis.
  • Expanding the differential diagnosis for myocarditis to include Legionella infections is crucial.

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