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Infection and Immunity, January 2006, p. 744-749, Vol. 74, No. 1
0019-9567/06/$08.00+0     doi:10.1128/IAI.74.1.744-749.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

The pap Operon of Avian Pathogenic Escherichia coli Strain O1:K1 Is Located on a Novel Pathogenicity Island

Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, 1802 Elwood Drive, VMRI #2, Iowa State University, Ames, Iowa 50011

Received 19 September 2005/ Accepted 5 October 2005

We have identified a 56-kb pathogenicity island (PAI) in avian pathogenic Escherichia coli strain O1:K1 (APEC-O1). This PAI, termed PAI I_APEC-O1, is integrated adjacent to the 3' end of the pheV tRNA gene. It carries putative virulence genes of APEC (pap operon), other E. coli genes (tia and ireA), and a 1.5-kb region unique to APEC-O1. The kps gene cluster required for the biosynthesis of polysialic acid capsule was mapped to a location immediately downstream of this PAI.

Editor: V. J. DiRita

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