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Infectious endocarditis caused by Nocardia sp.: histological morphology as a guide for the specific diagnosis
Castelli, Jussara Bianchi; Siciliano, Rinaldo Focaccia; Abdala, Edson; Aiello, Vera Demarchi.
  • Castelli, Jussara Bianchi; Universidade de São Paulo. Medical School. InCor. Laboratory of Pathology. BR
  • Siciliano, Rinaldo Focaccia; USP. Medical School. InCor. Infection Control Unit. BR
  • Abdala, Edson; USP. Medical School. Gastroenterology Department. Liver Tranplant Service. BR
  • Aiello, Vera Demarchi; Universidade de São Paulo. Medical School. InCor. Laboratory of Pathology. BR
Braz. j. infect. dis ; 15(4): 384-386, July-Aug. 2011. ilus
Artículo en Inglés | LILACS | ID: lil-595683
ABSTRACT
Nocardia is a rare opportunistic agent, which may affect immunocompromised individuals causing lung infections and exceptionally infective endocarditis (IE). There are few reports of IE caused by Nocardia sp., usually involving biological prostheses but rarely in natural valves. Its accurate microbiological identification may be hampered by the similarity with Rhodococcus equi and Corynebacterium spp. Here we report a case of native mitral valve IE caused by this agent in which the clinical absence of response to vancomycin and the suggestion of Nocardia sp. by histology pointed to the misdiagnosis of Corynebacterium spp. in blood cultures. The histological morphology can advise on the need for expansion of cultivation time and use of extra microbiological procedures that lead to the differential diagnosis with Corynebacterium spp. and other agents, which is essential to establish timely specific treatment, especially in immunocompromised patients.
Asunto(s)


Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Endocarditis Bacteriana / Nocardia Tipo de estudio: Estudio diagnóstico / Estudio pronóstico Límite: Adulto / Humanos / Masculino Idioma: Inglés Revista: Braz. j. infect. dis Asunto de la revista: Enfermedades Transmisibles Año: 2011 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: USP/BR / Universidade de São Paulo/BR

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Endocarditis Bacteriana / Nocardia Tipo de estudio: Estudio diagnóstico / Estudio pronóstico Límite: Adulto / Humanos / Masculino Idioma: Inglés Revista: Braz. j. infect. dis Asunto de la revista: Enfermedades Transmisibles Año: 2011 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: USP/BR / Universidade de São Paulo/BR