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Infectious endocarditis caused by Bartonella henselae associated with infected pets: two case reports
Jonathan Gonçalves-Oliveira1, Paulo Vieira Damasco2,3, Matheus Ribeiro da S Assis4
1Laboratório de Hantaviroses E Rickettsioses, Instituto Oswaldo Cruz (IOC/FIOCRUZ), Manguinhos, Rio de Janeiro, RJ, Brazil. jonathan.goncalves@fiocruz.br.
Background:
Blood culture-negative infective endocarditis is a potentially severe disease that can be associated with infectious agents such as Bartonella spp., Coxiella burnetti, Tropheryma whipplei, and some fungi.
Case Presentation:
Reported here are two cases of blood culture-negative infective endocarditis in patients with severe aortic and mitral regurgitation in Brazil; the first case is a 47-year-old white man and the second is a 62-year-old white woman. Bartonella henselae deoxyribonucleic acid was detectable in the blood samples and cardiac valve with vegetation paraffin-fixed tissue samples. Additionally, an investigation was carried out on patients' pets, within the context of One Health, and serum samples collected from cats and dogs were reactive by indirect immunofluorescence assay.
Conclusions:
Even though the frequency of bartonellosis in Brazil is unknown, physicians should be aware of the possibility of blood culture-negative infective endocarditis caused by Bartonella, particularly in patients with weight loss, kidney changes, and epidemiological history for domestic animals.
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