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344492

Molecular Identification of Resistance and Pathogenicity Genes of E. coli Isolated From Broiler Chicken Farms

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

Avian and aquatic Diseases

Abstract

Escherichia coli (E. coli) is a widespread avian pathogen, usually considered as secondary pathogen for different infectious agents causing huge financial losses in the poultry industry. A total of 18 flocks out of 30 broiler flocks (60%) were positive for E. coli infection. Based on the Congo red (CR) binding assay, 15 flocks out of 18 were identified as pathogenic E. coli (83.3%) and 3 flocks appeared as non-pathogenic E. coli (16.6%). All pathogenic E. coli were subjected to in vitro antibiotic sensitivity testing to select the most resistant isolates. Ten pathogenic E. coli isolates representing ten different broiler flocks were subjected to molecular identification via polymerase chain reaction (PCR) for both resistance and virulence genes. The most predominant isolated serotypes were O91, O128, O78, O124, O2 and O44. These strains were related to EHEC, EPEC, ETEC, and EIEC. These E. coli isolates are multidrug-resistant (MDR) to extensively drug-resistant (XDR). The viruhave genes tsh, papC, iss, iutA, and hlyF were detected in 50% of isolates having 5 genes and 50% having 4 genes. All the tested isolates showed MDR genes 60% of isolates were positive for 5 resistance genes, 20% were positive for 4 resistance genes and 20% were positive for resistance 3 genes. We can conclude that E. coli continues to threaten the poultry industry and further studies are recommended to find safe antibiotic natural alternatives to overcome E. coli MDR existing strains side by side with strengthening the bird's immunity and application of strict hygienic measures.

DOI

10.21608/ejvs.2024.252030.1691

Keywords

E. coli, Antibiotic sensitivity, multidrug resistance, PCR, Resistant genes, Virulence genes

Authors

First Name

Ahmed

Last Name

Ahmed

MiddleName

A.

Affiliation

master student

Email

drahmedaliahmed.2016@gmail.com

City

Giza

Orcid

-

First Name

Heba

Last Name

Salem

MiddleName

M.

Affiliation

Department of Poultry Diseases, Faculty of Veterinary Medicine, Cairo University; Giza, 12211, Egypt

Email

dr.hebasalem@cu.edu.eg

City

Giza

Orcid

0000-0002-4453-7884

First Name

Mohamed

Last Name

Hamoud

MiddleName

M.

Affiliation

Department of Poultry Diseases, Faculty of Veterinary Medicine, Cairo University; Giza, 12211, Egypt

Email

mohamed.hamoud@cairo3apoultry.com

City

Giza

Orcid

-

First Name

Mohamed

Last Name

Amer

MiddleName

Mahrous

Affiliation

Department of Poultry Diseases. Faculty of Veterinary Medicine. Cairo University. Postal Code: 12211 Giza, Egypt.

Email

profdramer@yahoo.com

City

Giza

Orcid

0000-0001-8965-7698

Volume

55

Article Issue

7

Related Issue

46472

Issue Date

2024-12-01

Receive Date

2023-12-31

Publish Date

2024-12-01

Page Start

1,787

Page End

1,800

Print ISSN

1110-0222

Online ISSN

2357-089X

Link

https://ejvs.journals.ekb.eg/article_344492.html

Detail API

https://ejvs.journals.ekb.eg/service?article_code=344492

Order

344,492

Type

Original Article

Type Code

140

Publication Type

Journal

Publication Title

Egyptian Journal of Veterinary Sciences

Publication Link

https://ejvs.journals.ekb.eg/

MainTitle

Molecular Identification of Resistance and Pathogenicity Genes of E. coli Isolated From Broiler Chicken Farms

Details

Type

Article

Created At

23 Dec 2024