Differentiation of Escherichia coli pathotypes by oligonucleotide spotted array

Raghavan U.M. Palaniappan, Yu Zhang, David Chiu, Alfonso Torres, Chobi DebRoy, Thomas S. Whittam, Yung Fu Chang

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

To accurately determine the pathotypes of Escherichia coli strains, a comprehensive assessment of each strain that targets multiple genes is required. A new approach to the identification and characterization of E. coli pathotypes was developed by constructing gene-specific probes (70-mers) for not only the virulence genes associated with each E. coli pathotype but also the O157-, CFT073-, and K-12-specific and common genes of each pathotype. Analysis of oligonucleotide probes with reference and clinical isolates of E. coli pathotypes indicated that the array could differentiate the pathotypes on the basis of their virulence and specific gene patterns. Probes targeting common genes of E. coli were present in all the reference and clinical strains. Salmonella enterica subsp. enferica-specific genes and Salmonella core genes were used as negative controls. The entire E. coli pathotype showed reactivity to only 4 of the 81 Salmonella-specific gene probes. Characterization of the genetic and virulence profiles of a single strain by using probes for virulence factors and specific and common genes in the spotted array is an ideal diagnostic tool for determination of E. coli pathotypes and could also have a significant impact on the epidemiological analysis of E. coli infections.

Original languageEnglish (US)
Pages (from-to)1495-1501
Number of pages7
JournalJournal of clinical microbiology
Volume44
Issue number4
DOIs
StatePublished - Apr 1 2006

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Oligonucleotide Array Sequence Analysis
Escherichia coli
Genes
Virulence
Salmonella
Escherichia coli Infections
Salmonella enterica
Gene Targeting
Oligonucleotide Probes
Virulence Factors

All Science Journal Classification (ASJC) codes

  • Microbiology (medical)

Cite this

Palaniappan, R. U. M., Zhang, Y., Chiu, D., Torres, A., DebRoy, C., Whittam, T. S., & Chang, Y. F. (2006). Differentiation of Escherichia coli pathotypes by oligonucleotide spotted array. Journal of clinical microbiology, 44(4), 1495-1501. https://doi.org/10.1128/JCM.44.4.1495-1501.2006
Palaniappan, Raghavan U.M. ; Zhang, Yu ; Chiu, David ; Torres, Alfonso ; DebRoy, Chobi ; Whittam, Thomas S. ; Chang, Yung Fu. / Differentiation of Escherichia coli pathotypes by oligonucleotide spotted array. In: Journal of clinical microbiology. 2006 ; Vol. 44, No. 4. pp. 1495-1501.
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Palaniappan, RUM, Zhang, Y, Chiu, D, Torres, A, DebRoy, C, Whittam, TS & Chang, YF 2006, 'Differentiation of Escherichia coli pathotypes by oligonucleotide spotted array', Journal of clinical microbiology, vol. 44, no. 4, pp. 1495-1501. https://doi.org/10.1128/JCM.44.4.1495-1501.2006

Differentiation of Escherichia coli pathotypes by oligonucleotide spotted array. / Palaniappan, Raghavan U.M.; Zhang, Yu; Chiu, David; Torres, Alfonso; DebRoy, Chobi; Whittam, Thomas S.; Chang, Yung Fu.

In: Journal of clinical microbiology, Vol. 44, No. 4, 01.04.2006, p. 1495-1501.

Research output: Contribution to journalArticle

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