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Infection and Immunity, January 1999, p. 429-432, Vol. 67, No. 1
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Virulence Properties of Escherichia coli 83972, a Prototype Strain Associated with Asymptomatic Bacteriuria

Richard A. Hull,1,* Delbert C. Rudy,2 William H. Donovan,3,4 Inge E. Wieser,3 Colleen Stewart,5 and Rabih O. Darouiche5,6

Department of Microbiology and Immunology, Baylor College of Medicine,1 Division of Urology2 and Department of Physical Medicine and Rehabilitation,3 University of Texas Health Science Center, The Institute for Rehabilitation and Research,4 and Department of Physical Medicine and Rehabilitation (Spinal Cord Injury Service)5 and Department of Medicine (Infectious Disease Section),6 Baylor College of Medicine and Veterans Administration Medical Center, Houston, Texas

Received 17 July 1998/Returned for modification 20 August 1998/Accepted 15 October 1998

Little is known about bacteria associated with asymptomatic bacteriuria (ABU) with regard to urinary tract colonization mechanisms. In this study, virulence properties of Escherichia coli 83972, a strain that was isolated from a clinical ABU episode, were examined. The genetic potential for expression of P and type 1 pili was demonstrated, and DNA sequences related to type 1C and G (UCA) pilus genes were also detected. However, E. coli 83972 did not express D-mannose-resistant or D-mannose-sensitive hemagglutination after growth under standard conditions in vitro or upon isolation from the urine of colonized test subjects. Limited uroepithelial cell adherence was observed in vivo, and weak D-mannose-sensitive hemagglutination was detected after extended growth in urine in vitro.

* Corresponding author. Mailing address: Department of Microbiology and Immunology, Baylor College of Medicine, Houston, TX 77030. Phone: (713) 798-4926. Fax: (713) 798-7375. E-mail: rhull{at}bcm.tmc.edu.

Infection and Immunity, January 1999, p. 429-432, Vol. 67, No. 1
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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