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Attachment of Burkholderia pseudomallei to pharyngeal epithelial cells: a highly pathogenic bacteria with low attachment ability


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Title: Attachment of Burkholderia pseudomallei to pharyngeal epithelial cells: a highly pathogenic bacteria with low attachment ability
Authors: Ahmed, Kamruddin / Enciso, Hernan D. R. / Masaki, Hironori / Tao, Misao / Omori, Akemi / Tharavichikul, Prasit / Nagatake, Tsuyoshi
Issue Date: Jan-1999
Publisher: American Society of Tropical Medicine and Hygiene
Citation: American Journal of Tropical Medicine and Hygiene, 60(1), pp.90-93; 1999
Abstract: Respiratory infections are initiated by the attachment of bacteria to pharyngeal epithelial cells. We studied the attachment of Burkholderia pseudomallei to pharyngeal epithelial cells. After one, two, three, and four washes, there were 22.6+/-8.9, 15.7+/-7.0, 6.8+/-3.1, and 4.6+/-1.1 (mean+/-SD) attached bacteria/cell, respectively. If the bacterial concentration was maintained at 1 X 10(8) colony-forming units (cfu)/ml and three washes were done, at concentrations of 2.5 x 10(4), 5 X 10(4), and 1 x 10(5) cells/ml there were 9.9+/-3.6, 3.3+/-0.8, and 2.5+/-1.1 attached bacteria/cell, respectively. If the cell concentration was kept at 2.5 x 10(4) cells/ml and three washes were done, at bacterial concentrations of 1 x 10(5), 1 X 10(6), 1 X 10(7), 1 x 10(8), and 1 x 10(9) cfu/ml, there were 0.3+/-0.3, 0.6+/-0.6, 1.0+/-0.2, 5.1+/-2.3, and 9.6+/-1.9 attached bacteria/cell, respectively. There were 4.8+/-1.9, 5.5+/-2.5, 5.6+/-1.9, and 6.4+/-2.6 attached bacteria/cell at 0, 30, 120, and 240 min of incubation, respectively. Pharyngeal cells from 10 persons (seven men and three women, mean+/-SD age = 30.7+/-8.1 years, 12 experiments with a single isolate) showed that there were 7.8+/-4.3 attached bacteria/cell. It was found that the efficiency of attachment of this bacteria was very low (7.0+/-3.3 bacteria/cell). Electron microscopy revealed that there were no fimbriae but a thin capsular polysaccharide layer on the surface of B. pseudomallei. Attachment to pharyngeal epithelial cells appeared to be mediated by this structure.
URI: http://hdl.handle.net/10069/20119
ISSN: 00029637
PubMed ID: 9988329
Relational Links: http://www.ajtmh.org/cgi/content/abstract/60/1/90
Rights: Copyright (c) 1999 by The American Society of Tropical Medicine and Hygiene
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/20119

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