Presence of Virulence-Associated Genes and Ability to Form Biofilm among Clinical Isolates of <i>Escherichia coli</i>Causing Urinary Infection in Domestic Animals

作     者：Cherise Hill Marianne Pan Lmar Babrak Lia Danelishvili Helio De Morais Luiz E. Bermudez 

作者机构：Department of Biomedical Sciences College of Veterinary Medicine Oregon State University Corvallis USA Department of Microbiology College of Science Oregon State University Corvallis USA Department of Clinical Sciences College of Veterinary Medicine Oregon State University Corvallis USA 

出 版 物：《Advances in Microbiology》 (微生物学（英文）)

年 卷 期：2015年第5卷第8期

页      面：573-579页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：E. coli Pathogenesis-Related Genes Biofilm Urinary Tract Infection Animals UPEC 

摘      要：Background: Urinary tract infection caused by Escherichia coli is a frequently observed condition both in humans and animals. Uropathogenic E. coli (UPEC) has been shown to have a pathogenicity island that enables them to infect the urinary tract. Because there is little information about the presence of UPEC-associated virulent genes in animal isolates this work was carried out with the intent to enhance the understanding about the strains of *** that cause infections in animals. Results: We screened 21 E. coli strains isolated causing urinary tract infection in domestic animals. Primers were designed to amplify urinary infection-associated genes. Nine genes, papA, tcpC, fyuA, tpbA, Lma, hylA, picU, tonB, and flicC were then amplified and sequenced. Different from the human isolate CFT073, all the animals E. coli lack some of the pathogenesis-associated genes. Genes encoding for proteins used to scavenge iron appear not to be so necessary during animal infections as they are in human infection. In further investigation of phenotypic properties, it was observed that animal UPECs have significantly more impaired ability to form biofilms than human UPEC strain. Conclusions: This study identified significant differences between human and animal UPECs. This may have its roots in the fact that it is difficult to determine if an animal has symptoms. Future studies will focus on some of the observations.