Community-acquired pneumonia caused by Legionella longbeachae in an immunocompetent patient
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- Diederen, B.M.W., van Zwet, A.A., van der Zee, A. et al. Eur J Clin Microbiol Infect Dis (2005) 24: 545. doi:10.1007/s10096-005-1368-9
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Reported here is the case of a previously healthy 67-year-old man who was admitted to the intensive care unit with pneumonia caused by Legionella longbeachae. The organism was identified in sputum and serum by 16S rRNA-based PCR assay and sequence-based typing. One acute serum sample produced a single elevated IgM antibody titer of 1:512 against non-pneumophila Legionella spp. The patient fully recovered following the initiation of appropriate antibiotic treatment. Since most current laboratory tests for Legionella spp. cannot detect infections caused by non-pneumophila Legionella spp., culture on Legionella-selective media or PCR should be considered when diagnosing severe pneumonia of unknown etiology.