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Variations in 10 putative uropathogen virulence genes among urinary, faecal and peri-urethral Escherichia coli

CARL F. MARRS, LIXIN ZHANG, PATRICIA TALLMAN, SHANNON D. MANNING, PATRICIA SOMSEL^*, PAUL RAZ, RAUL COLODNER, MARIA E. JANTUNEN^,||, ANJA SIITONEN^||, HARRI SAXEN and BETSY FOXMAN

Department of Epidemiology, University of Michigan School of Public Health, 109 Observatory Street, Ann Arbor, MI 48109, *Bureau of Laboratories, Michigan Department of Community Health, 3350 N. Martin Luther King Jr Blvd, PO Box 30035, Lansing, MI 48909, Infectious Disease Unit and Microbiology Laboratory, Ha'Emek Medical Center, 18101 Afula, Israel and Faculty of Medicine, Technion, Haifa, Israel, Hospital for Children and Adolescents, University of Helsinki and ||Laboratory of Enteric Pathogens, National Public Health Institute, Mannerheimintie 166, FIN-00300, Helsinki, Finland

Corresponding author: Dr C. F. Marrs.

Received 23 April 2001; revised version accepted 13 July 2001.

Abstract

A total of 868 isolates was screened from seven different collections of organisms from previous studies – pyelonephritis in children aged 1–24 months; first, second and recurring urinary tract infection (UTI) in women aged 18–39 years; UTI in women aged 40–65 years and peri-urethral and faecal isolates from women aged 18–39 years – for the presence of 10 potential Escherichia coli UTI virulence genes. Previously reported differences between the frequency of these genes in UTI compared with faecal isolates were confirmed and extended. A single virulence signature (strains containing aer, kpsMT, ompT, fim and papG_AD) occurred in 29% of the pyelonephritic isolates, but in no more than 11% of the other collections. Peri-urethral isolates were found to have frequencies of these 10 genes that differed from those found for both UTI and faecal isolates.

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