Chronic active myocarditis following acute Bartonella henselae infection (cat scratch disease)

Area of Science:

• Cardiology
• Infectious Diseases
• Pathology

Background:

• Myocarditis is inflammation of the heart muscle.
• Bartonella henselae is a bacterium known to cause cat scratch disease.
• A link between Bartonella infection and myocarditis has not been previously established.

Observation:

• A case study of a young, healthy male patient is presented.
• The patient developed chronic active myocarditis following Bartonella henselae infection.
• The condition progressed to severe heart failure.

Findings:

• Bartonella henselae infection was identified as the cause of chronic active myocarditis in this patient.
• The patient required an orthotopic heart transplant due to the severity of heart failure.
• This case demonstrates a novel association between Bartonella henselae and myocardial inflammation.

Implications:

• Bartonella henselae should be considered in the differential diagnosis of infectious agents causing chronic active myocarditis.
• Further research is warranted to understand the prevalence and mechanisms of Bartonella-associated myocarditis.
• This finding may impact clinical guidelines for diagnosing and managing myocarditis, particularly in cases with unclear etiology.