Related Experiment Videos
Bartonella (Rochalimaea) quintana endocarditis in three homeless men
M Drancourt1, J L Mainardi, P Brouqui
1Unité des Rickettsies, Faculté de Médecine, Marseilles, France.
The New England Journal of Medicine
|February 16, 1995
Summary
Bartonella quintana causes endocarditis in homeless individuals. Diagnosis can be complicated by cross-reacting antibodies, potentially leading to misdiagnosis as chlamydial infection.
Area of Science:
- Infectious Diseases
- Bacteriology
- Cardiology
Background:
- Trench fever is caused by Bartonella (Rochalimaea) quintana, a pathogen transmitted by body lice.
- Endocarditis is a serious infection affecting the heart valves.
- Homeless populations are at increased risk for certain infectious diseases.
Observation:
- Bartonella quintana was investigated in three homeless men presenting with endocarditis.
- Diagnostic methods included blood cultures, endothelial cell cultures, Gram staining, immunostaining, PCR, and serological tests.
- The study aimed to identify the causative agent and assess serological responses.
Findings:
- Bartonella quintana was successfully isolated from blood and identified in cardiac vegetations and lymph nodes.
- Molecular analysis confirmed the identity of the isolates as Bartonella quintana.
- Patients showed high antibody titers to Bartonella quintana, but also cross-reactivity with Chlamydia species, complicating serological diagnosis.
Implications:
- Bartonella quintana is identified as a significant cause of endocarditis in the homeless population.
- Serological misdiagnosis is a potential challenge due to cross-reacting antibodies, particularly with Chlamydia species.
- This highlights the need for comprehensive diagnostic approaches in at-risk populations.