Genotypic and phenotypic diversity differences of presumptive commensal and avian pathogenic E. coli.

A new interesting article has been published in Br Poult Sci. 2018 Nov 5. doi: 10.1080/00071668.2018.1544415. [Epub ahead of print] and titled:

Genotypic and phenotypic diversity differences of presumptive commensal and avian pathogenic E. coli.

Authors of this article are:

Al-Kandari F, Woodward MJ.

A summary of the article is shown below:

1. The objective of the experiment was to characterise the genotypic and phenotypic differences between presumptive commensal E. coli and avian pathogenic E. coli (APEC) of poultry. 2. DNA was extracted from 65 confirmed APEC E. coli from chicken, 100 presumptive commensal E. coli from healthy turkey and 35 from healthy chicken. Enterobacterial repetitive intergenic consensus PCR (ERIC-PCR) and virulence factors genotyping was performed to characterise genetic features. 3. Carbon source utilisation and antimicrobial susceptibility tests were performed to characterise phenotypic features of isolates. 4. The genetic divergence between E. coli strains tested by ERIC-PCR profiles and virulence associated genes showed a clear genetic separation between E. coli APEC and turkey E. coli strains. 5. The carbon utilisation profile of turkey isolates was different from chicken and APEC strains; whereas antimicrobial susceptibility was highest for turkey isolates (53%), and lowest for APEC strains (33.8%). 6. The study showed a significant negative correlation between utilisation of arabitol and adonitol with different virulence determinants tested, which suggests that the ability to utilise some uncommon carbon sources may be used to discriminate between presumptive commensal E. coli and APEC.

Check out the article’s website on Pubmed for more information:



This article is a good source of information and a good way to become familiar with topics such as:

APEC;E. coli;antimicrobial resistance;carbon source;commensal;virulence genes

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