RESUMEN
Legionella micdadei is a potential cause of invasive lung infections in immunocompromised hosts. On biopsy specimens, it can appear as an acid-fast bacillus (AFB) and can be mistaken for a member of genus Mycobacterium. As Legionella requires selective media to grow in culture, and the commonly used, commercially available urine antigen test for Legionella only detects Legionella pneumophila serogroup-1, but not L. micdadei, it is important to consider this organism in the differential diagnosis for AFB in immunocompromised hosts. We report a case of L. micdadei infection, which was initially treated empirically for non-tuberculous mycobacteria based on AFB staining of biopsy tissue before the final diagnosis was made.
Asunto(s)
Antígenos Bacterianos/inmunología , Trasplante de Células Madre Hematopoyéticas , Huésped Inmunocomprometido/inmunología , Legionella/aislamiento & purificación , Legionelosis/diagnóstico , Enfermedades Pulmonares/diagnóstico , Anciano , Biopsia , Diagnóstico Diferencial , Resultado Fatal , Humanos , Legionella/inmunología , Legionelosis/microbiología , Legionelosis/cirugía , Enfermedades Pulmonares/microbiología , Enfermedades Pulmonares/cirugía , Masculino , Tomografía Computarizada por Rayos XRESUMEN
We report a case of infectious endocarditis attributable to Legionella longbeachae. L. longbeachae is usually associated with lung infections. It is commonly found in composted waste wood products. L. longbeachae should be regarded as an agent of infectious endocarditis, notably in the context of gardening involving handling of potting soils.