Elucidating global epidemiology of Burkholderia multivorans in cases of cystic fibrosis by multilocus sequence typing

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Abstract

Burkholderia multivorans is a prominent B. cepacia complex (BCC) species causing infection in people with cystic fibrosis. Despite infection control measures being introduced to reduce the spread of BCC there is a continued emergence of infections by B. multivorans. Our objective was to analyze a global collection of B. multivorans isolates, comparing those from environmental and clinical sources with those from reported outbreaks. Multilocus sequence typing (MLST) was performed on 107 B. multivorans isolates to provide a detailed analysis of the global population biology of this species. MLST resolved 64 B. multivorans sequence types. Twelve of these were globally distributed and associated with human infection; two of these (ST-21 and ST-375) were also composed of environmental isolates. These global lineages included strains previously linked to large outbreaks (e.g., French epidemic clone ST-16). Though few environmental isolates of B. multivorans were available for analysis, of six strains identified, three were identical to strains recovered from cystic fibrosis (CF) infection. Although the ability of B. multivorans to cause CF outbreaks is known, our report here concerning the existence of globally distributed B. multivorans CF strains is a new observation for this emerging B. cepacia complex pathogen and suggests that certain strain types may be better adapted to human infection than others. Common transmission-associated risk factors were not obviously linked to the globally distributed strains; however, the overlap in strains recovered from water environments, industrial products, and human infection suggests that environmental sources may be an important reservoir for infection with B. multivorans.

Item Type: Journal Article
Subjects: Q Science > QR Microbiology
R Medicine > RC Internal medicine
Divisions: Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Biological Sciences ( -2010)
Library of Congress Subject Headings (LCSH): Cystic Fibrosis, Gram-negative bacterial infections
Journal or Publication Title: Journal of Clinical Microbiology
Publisher: American Society of Microbiology
ISSN: 0095-1137
Official Date: January 2008
Dates:
Date
Event
January 2008
Published
Volume: Vol.46
Number: No.1
Number of Pages: 6
Page Range: pp. 290-295
DOI: 10.1128/JCM.01818-07
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Cystic Fibrosis Trust, Cystic Fibrosis Foundation, Canadian Cystic Fibrosis Foundation
Grant number: PJ 535 (CFT)
URI: https://wrap.warwick.ac.uk/30755/

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