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168644

PREVALENCE OF VIRULENCE FACTORS AND ANTIBIOTIC RESISTANCE GENES IN SHIGA TOXIN-PRODUCING ESCHERICHIA COLI ISOLATED FROM QUAILS

Article

Last updated: 05 Jan 2025

Subjects

-

Tags

Avian / Rabbit diseases
Laboratory investigation
Microbiology, mycology and immunology

Abstract

This study aimed to determine theprevalence, pathological investigation and profiles of virulence and antibiotic resistance genes in Shiga toxin-producing Escherichia coli (E. coli) isolated from quails.A total of 450 samples were collected from 150 quails (50apparently healthy, 50 diseased and 50 recently dead) for bacterial isolation. The isolated E.coli was tested for antimicrobial susceptibility and was screened for the presence of virulence genes (stx1, stx2, eaeA,and hly) and antibiotic resistance genes (tetAandsul1) using polymerase chain reaction (PCR). Seven-day old quails were challenged with E. coli to determine the pathogenicity of the isolated strains. A total number of 93 (20.67%) E. coli isolates were recovered. The most prevalent serogroups O125, O20, and O78. E. coli were highly sensitive to neomycin, norfloxacin, and, colistin, highly resistant to sulphamethoxazole, tetracycline, and amoxicillin. Stx2 and eaeA genes were detected in (3/8) and (2/8) of isolates, respectively, while all isolates were negative for stx1 and hly genes. Moreover, tetA and sul1 genes were detected in 100% of examined isolates. The pathogenicity test revealed that E .coli (O125 STEC) was a highly pathogenic and induced mortality rate of 40%. Histopathological changes supported the post mortem lesions. In conclusion, these data can be considered alarming since quail may be a carrier of STEC that is highly pathogenic for humans. Also, these E. coli showed marked resistance to several antibiotics of clinical interest. So proper hygiene regime and biosecurity measures are necessary to minimize the risk of spread of infection to the human population.

DOI

10.21608/avmj.2020.168644

Keywords

Keywords: Quails, STEC, Antibiotic resistance, Virulence genes

Volume

66

Article Issue

167

Related Issue

24252

Issue Date

2020-10-01

Receive Date

2020-10-17

Publish Date

2020-10-01

Page Start

84

Page End

99

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_168644.html

Detail API

https://avmj.journals.ekb.eg/service?article_code=168644

Order

8

Type

Research article

Type Code

1,840

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

https://avmj.journals.ekb.eg/

MainTitle

PREVALENCE OF VIRULENCE FACTORS AND ANTIBIOTIC RESISTANCE GENES IN SHIGA TOXIN-PRODUCING ESCHERICHIA COLI ISOLATED FROM QUAILS

Details

Type

Article

Created At

23 Jan 2023