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Infection and Immunity, July 2001, p. 4678-4680, Vol. 69, No. 7
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.7.4678-4680.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Dr Operon-Associated Invasiveness of Escherichia coli from Pregnant Patients with Pyelonephritis

Pawel Goluszko,1,* David Niesel,2 Bogdan Nowicki,1 Rangaraj Selvarangan,1,dagger Stella Nowicki,1 Audrey Hart,1 Edyta Pawelczyk,1 Margaret Das,1 Petri Urvil,1 and Rafia Hasan1

Departments of Obstetrics and Gynecology1 and Microbiology and Immunology,2 University of Texas Medical Branch, Galveston, Texas 77555

Received 4 December 2000/Returned for modification 29 January 2001/Accepted 6 April 2001

We used a gentamicin protection assay to assess the ability of gestational pyelonephritis isolates of Escherichia coli to invade HeLa cells. The ability to enter HeLa cells was strongly associated with the presence of Dr operons coding for Dr adhesins. In contrast, the nonivasive isolates predominantly expressed papG, coding for P fimbriae.

* Corresponding author. Mailing address: The University of Texas Medical Branch, 301 University Blvd. Rt 1062, Galveston, TX 77555-1062. Phone: (409) 772-2221. Fax: (409) 747-0475. E-mail: pgoluszk{at}utmb.edu.

dagger Present address: Division of Clinical Microbiology, Department of Laboratory Medicine, University of Washington, Seattle, WA 98195-7110.

Infection and Immunity, July 2001, p. 4678-4680, Vol. 69, No. 7
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.7.4678-4680.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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