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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/724
Title: Effect of colony morphology variation of Burkholderia pseudomallei on intracellular survival and resistance to antimicrobial environments in human macrophages in vitro
Authors: Sarunporn Tandhavanant
ศรัณย์พร ตัณฑวนันท์
Aunchalee Thanwisai
อัญชลี ฐานวิสัย
Direk Limmathurotsakul
ดิเรก ลิ้มมธุรสกุล
Sunee Korbsrisate
Day, Nicholas P.J.
Peacock, Sharon J.
Narisara Chantratita
นริศรา จันทรานิตย
Mahidol University. Faculty of Tropical Medicine. Mahidol-Oxford Tropical Medicine Research Unit
Mahidol University. Faculty of Tropical Medicine. Department of Immunology
Mahidol University. Faculty of Tropical Medicine. Department of Tropical Hygiene
Mahidol University. Faculty of Medicine Siriraj Hospital. Department of Immunology.
Narisara Chantratita
Keywords: Burkholderia pseudomallei;Drug resistance, bacterial;Humans;Open Access article
Issue Date: 10-Nov-2010
Citation: Tandhavanant S, Thanwisai A, Limmathurotsakul D, Korbsrisate S, Day NP, Peacock SJ, et al. Effect of colony morphology variation of Burkholderia pseudomallei on intracellular survival and resistance to antimicrobial environments in human macrophages in vitro. BMC Microbiol. 2010 Nov 30;10:303.
Abstract: BACKGROUND: Primary diagnostic cultures from patients with melioidosis demonstrate variation in colony morphology of the causative organism, Burkholderia pseudomallei. Variable morphology is associated with changes in the expression of a range of putative virulence factors. This study investigated the effect of B. pseudomallei colony variation on survival in the human macrophage cell line U937 and under laboratory conditions simulating conditions within the macrophage milieu. Isogenic colony morphology types II and III were generated from 5 parental type I B. pseudomallei isolates using nutritional limitation. Survival of types II and III were compared with type I for all assays. RESULTS: Morphotype was associated with survival in the presence of H2O2 and antimicrobial peptide LL-37, but not with susceptibility to acid, acidified sodium nitrite, or resistance to lysozyme, lactoferrin, human neutrophil peptide-1 or human beta defensin-2. Incubation under anaerobic conditions was a strong driver for switching of type III to an alternative morphotype. Differences were noted in the survival and replication of the three types following uptake by human macrophages, but marked strain-to strain-variability was observed. Uptake of type III alone was associated with colony morphology switching. CONCLUSIONS: Morphotype is associated with phenotypes that alter the ability of B. pseudomallei to survive in adverse environmental conditions.
URI: http://repository.li.mahidol.ac.th/dspace/handle/123456789/724
metadata.dc.identifier.url: http://www.biomedcentral.com/content/pdf/1471-2180-10-303.pdf
ISSN: 1471-2180 (electronic)
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