Journal Article

Successful Treatment of <i>Balamuthia</i> Amoebic Encephalitis: Presentation of 2 Cases

Thomas R. Deetz, Mark H. Sawyer, Glenn Billman, Frederick L. Schuster and Govinda S. Visvesvara

in Clinical Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 37, issue 10, pages 1304-1312
Published in print November 2003 | ISSN: 1058-4838
Published online November 2003 | e-ISSN: 1537-6591 | DOI: http://dx.doi.org/10.1086/379020
Successful Treatment of Balamuthia Amoebic Encephalitis: Presentation of 2 Cases

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Case histories are presented of 2 individuals (a 5-year-old girl and 64-year-old man) who developed encephalitis caused by the free-living amoeba Balamuthia mandrillaris Both individuals survived after diagnosis and initiation of effective antimicrobial therapy. Immunostaining for Balamuthia-specific antibody levels identified the causative agent of the infections. Antimicrobial therapy with flucytosine, pentamidine, fluconazole, sulfadiazine, and a macrolide antibiotic (azithromycin or clarithromycin) was initiated. Phenothiazines (thioridazine and trifluoperazine) were also used. Both patients recovered, and there was no evidence of recrudescence of the disease at 2 and 6 years after onset of symptoms. Awareness of Balamuthia as the causative agent of encephalitis and early initiation of antimicrobial therapy were critical to the recovery of both patients. Although optimal antimicrobial therapy for Balamuthia amoebic encephalitis has yet to be determined, the antimicrobials used in these 2 cases effectively controlled the disease. These 2 individuals are the only known survivors of this otherwise fatal type of amoebic encephalitis.

Journal Article.  4031 words.  Illustrated.

Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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