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Isolation of Balamuthia mandrillaris from urban dust, free of known infectious involvement

Isolation of Balamuthia mandrillaris from urban dust, free of known infectious involvement The free-living amoeba Balamuthia mandrillaris can cause fatal encephalitis in humans and other mammals. The organism is associated with soils, and soil exposure has been identified as a risk factor for this pathogen. However, B. mandrillaris has been isolated only once from soils believed to be the source of the infection in child from California, USA who died of Balamuthia amoebic encephalitis and once from another unrelated soil source. We report for a third time the isolation of B. mandrillaris from the environment and for the second time its isolation from a sample not known to be involved with pathogenicity. We have established the new clonal B. mandrillaris strain (ID-19) in axenic media. The identity of our isolate was originally by morphology using a light microscope and this has been confirmed by 16S rRNA gene PCR. The new strain ID-19 groups with others of the species. The fact that our isolate came from dust particles deposited on surfaces from the air in an urban environment may suggest that it is not just soil exposure that constitutes a risk factor for Balamuthia infection. This is the first report of this organism from Iran. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Parasitology Research Springer Journals

Isolation of Balamuthia mandrillaris from urban dust, free of known infectious involvement

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References (14)

Publisher
Springer Journals
Copyright
Copyright © 2009 by Springer-Verlag
Subject
Biomedicine; Immunology; Microbiology ; Medical Microbiology
ISSN
0932-0113
eISSN
1432-1955
DOI
10.1007/s00436-009-1592-9
pmid
19685076
Publisher site
See Article on Publisher Site

Abstract

The free-living amoeba Balamuthia mandrillaris can cause fatal encephalitis in humans and other mammals. The organism is associated with soils, and soil exposure has been identified as a risk factor for this pathogen. However, B. mandrillaris has been isolated only once from soils believed to be the source of the infection in child from California, USA who died of Balamuthia amoebic encephalitis and once from another unrelated soil source. We report for a third time the isolation of B. mandrillaris from the environment and for the second time its isolation from a sample not known to be involved with pathogenicity. We have established the new clonal B. mandrillaris strain (ID-19) in axenic media. The identity of our isolate was originally by morphology using a light microscope and this has been confirmed by 16S rRNA gene PCR. The new strain ID-19 groups with others of the species. The fact that our isolate came from dust particles deposited on surfaces from the air in an urban environment may suggest that it is not just soil exposure that constitutes a risk factor for Balamuthia infection. This is the first report of this organism from Iran.

Journal

Parasitology ResearchSpringer Journals

Published: Aug 15, 2009

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