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Journal of Clinical Microbiology, April 1999, p. 1045-1048, Vol. 37, No. 4
Immunology Laboratory, Department of Clinical
Science, duPont Hospital for Children, Wilmington, Delaware
Received 22 September 1998/Returned for modification 8 December
1998/Accepted 7 January 1999
Cultures of Helicobacter pylori obtained from the
American Type Culture Collection (strain 43504) were grown as isolated
colonies or lawns on blood agar plates and in broth culture with
constant shaking. Examination of bacterial growth with Gram-stained
fixed preparation and differential interference contrast microscopy on
wet preparations revealed that bacteria grown on blood agar plates had
a morphology consistent with that normally reported for H. pylori whereas bacteria from broth cultures had the morphologic appearance of Helicobacter heilmannii. Bacteria harvested
from blood agar plates assumed an H. heilmannii-like
morphology when transferred to broth cultures, and bacteria from broth
cultures grew with morphology typical of H. pylori when
grown on blood agar plates. Analysis by PCR of bacteria isolated from
blood agar plates and broth cultures indicated that a single strain of
bacteria (H. pylori) was responsible for both morphologies.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Helicobacter pylori Can Be Induced To
Assume the Morphology of Helicobacter heilmannii
*
Corresponding author. Mailing address: duPont Hospital
for Children, Department of Clinical Science, P.O. Box 269, Wilmington, DE 19899. Phone: (302) 651-6776. Fax: (302) 651-6881. E-mail: pfawcett{at}nemours.org.
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