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Strain-specific iron-dependent virulence in Escherichia coli
Univ Louisville, James Graham Brown Canc Ctr, Louisville, KY 40202 USA Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA Univ Illinois, Dept Pathobiol, Urbana, IL 61801 USA Calif State Univ Chico, Dept Biol, Chico, CA USA Linkoping Univ, Fac Hlth Sci, Div Pathol 2, Linkoping, Sweden.
Univ Louisville, James Graham Brown Canc Ctr, Louisville, KY 40202 USA Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA Univ Illinois, Dept Pathobiol, Urbana, IL 61801 USA Calif State Univ Chico, Dept Biol, Chico, CA USA Linkoping Univ, Fac Hlth Sci, Div Pathol 2, Linkoping, Sweden.
Univ Louisville, James Graham Brown Canc Ctr, Louisville, KY 40202 USA Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA Univ Illinois, Dept Pathobiol, Urbana, IL 61801 USA Calif State Univ Chico, Dept Biol, Chico, CA USA Linkoping Univ, Fac Hlth Sci, Div Pathol 2, Linkoping, Sweden.
Univ Louisville, James Graham Brown Canc Ctr, Louisville, KY 40202 USA Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA Univ Illinois, Dept Pathobiol, Urbana, IL 61801 USA Calif State Univ Chico, Dept Biol, Chico, CA USA Linkoping Univ, Fac Hlth Sci, Div Pathol 2, Linkoping, Sweden.
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2001 (English)In: Journal of Infectious Diseases, ISSN 0022-1899, E-ISSN 1537-6613, Vol. 184, no 2, 159-165 p.Article in journal (Refereed) Published
Abstract [en]

For reasons unknown, certain Escherichia coli strains become highly virulent when injected with hemoglobin or other soluble iron sources. Two clinical isolates (virulent and nonvirulent) showed equivalent hemoglobin-mediated growth acceleration in vitro. However, when injected intraperitoneally into mice without hemoglobin, the virulent strain was cleared more slowly (t(1/2), >4 h vs. <30 min). The virulent E. coli strain had a polysialic acid-containing capsule, whereas the nonvirulent strain did not. Virulent E. coli grown at 20C (which blocks polysialylation) were cleared as rapidly as nonvirulent organisms. In another virulent E. coli strain having abundant outer membrane polysialic acid, targeted deletion of the polysialyltransferase accelerated host clearance and blocked iron-dependent virulence. The iron-dependent virulence of certain E. coli strains may represent the combined effect of slow in vivo clearance-associated, in this case, with outer membrane polysialylation coupled with accelerated growth permitted by iron compounds.

Place, publisher, year, edition, pages
2001. Vol. 184, no 2, 159-165 p.
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Medical and Health Sciences
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URN: urn:nbn:se:liu:diva-49216OAI: oai:DiVA.org:liu-49216DiVA: diva2:270112
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Eaton, John Wallace

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