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Murine typhus endocarditis.

A E Buchs1, R Zimlichman, E Sikuler

  • 1Department of Medicine, Soroka Medical Center, Beer Sheva, Israel.

Southern Medical Journal
|July 1, 1992
PubMed
Summary
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This case study details a sheepfarmer with Rickettsia typhi endocarditis, successfully treated with antibiotics. It highlights a rare instance of R typhi causing heart valve infection without surgical intervention.

Area of Science:

  • Infectious Diseases
  • Cardiology
  • Rickettsial Infections

Background:

  • Endocarditis, an infection of the heart lining or valves, can be caused by various pathogens.
  • Rickettsia typhi, the agent of murine typhus, is an intracellular bacterium rarely implicated in endocarditis.

Observation:

  • A 28-year-old sheepfarmer presented with symptoms of fever, headache, malaise, and aortic insufficiency.
  • Echocardiography showed a large vegetation on the tricuspid aortic valve and signs of left ventricular dysfunction.
  • Blood cultures were negative, but seroconversion for Rickettsia typhi (IgG and IgM) was confirmed on day 13.

Findings:

  • This represents the second reported case of endocarditis caused by Rickettsia typhi.
  • The patient experienced a favorable outcome with a prolonged course of tetracycline, avoiding surgical intervention.

Related Experiment Videos

  • Persistent positive IgM and IgG fluorescent antibodies to R typhi were noted for 8 months post-treatment.

    • Implications:

    • This case expands the spectrum of clinical manifestations for Rickettsia typhi infections.
    • It underscores the importance of considering rickettsial infections in endemic areas, even with negative blood cultures.
    • Non-surgical management with antibiotics can be effective for Rickettsia typhi endocarditis.