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321395

Microbiological and molecular characterization of E. coli and Salmonella isolated from diarrheic calves

Article

Last updated: 03 Jan 2025

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Abstract

Diarrhea is one of the most common fatal disease of neonatal calves regardless of farm welfare. What makes treatment of these cases challenging is the increase in the incidence of multi-drug resistant bacteria, including E. coli and Salmonella. To isolate, identify, molecular characterize of E. coli and salmonella in diarrheic calves, 50 fecal samples were collected and analyzed aseptically. The preliminary result showed that 62% and 14% samples were positive for E. coli and salmonella respectively. Among the E.coli isolates O86:K59, O128:K-, O55:K59 (2), O86:K61, O119:K58, O08:K61, O126:K71 serotypes was detected in eight isolates while one isolate was untypeable. Three salmonella serotypes, Salmonella Typhimurium, Salmonella Anatum and Salmonella Florida was detected in the isolated samples . All of the E. coli strains had eaeA genes while 16.7 and 11.1% of them harbored stx1 and stx2 genes respectively. About 71.4% of salmonella isolates were positive for all five pathogenicity island genes from SPI-1 to SPI-5, while SPI-1, SPI-2 and SPI-5 were detected in 14.3% and SPI-2, SPI-3, SPI-4 and SPI-5 were positive in 14.3%. All E. coli strains were resistant to Ampicillin, Amoxicillin/Clavulanic, Cefazolin and Aztreonam., and all Salmonella serovars were resistant to Cefazolin, Chloramphenicol, Gentamycin, Kanamycin and Aztreonam. The present study identified multidrug resistant E. coli and salmonella as the common pathogen of calf diarrhea in the study area and the pathogens harbored common virulence markers of human diarrheic strains which might cause a food borne outbreak in the future.

DOI

10.21608/svu.2023.222562.1282

Keywords

calves, diarrhea, E. coli, Salmonella, Multi-drug Resistant, PCR

Authors

First Name

Michael

Last Name

Salama

MiddleName

-

Affiliation

Department of Microbiology, Faculty of Veterinary Medicine, South Valley University. Qena, Egypt

Email

micsalama274@gmail.com

City

-

Orcid

-

First Name

Waleed

Last Name

Younis

MiddleName

-

Affiliation

Department of Microbiology, Faculty of Veterinary Medicine, South Valley University. Qena, Egypt

Email

wkhrdr39@gmail.com

City

-

Orcid

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First Name

Hams. M. A.

Last Name

Mohamed

MiddleName

-

Affiliation

Department of Microbiology, Faculty of Veterinary Medicine, South Valley University. Qena, Egypt

Email

drhams85@yahoo.com

City

qena

Orcid

-

First Name

Serageldeen

Last Name

Sultan

MiddleName

-

Affiliation

Department of Microbiology, Faculty of Veterinary Medicine, South Valley University. Qena, Egypt

Email

sultanserageldeen@gmail.com

City

qena

Orcid

0000-0003-3527-7803

Volume

6

Article Issue

4

Related Issue

42223

Issue Date

2023-12-01

Receive Date

2023-07-12

Publish Date

2023-12-14

Page Start

1

Page End

14

Print ISSN

2535-1826

Online ISSN

2535-1877

Link

https://svu.journals.ekb.eg/article_321395.html

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https://svu.journals.ekb.eg/service?article_code=321395

Order

321,395

Type

Research article

Type Code

712

Publication Type

Journal

Publication Title

SVU-International Journal of Veterinary Sciences

Publication Link

https://svu.journals.ekb.eg/

MainTitle

Microbiological and molecular characterization of E. coli and Salmonella isolated from diarrheic calves

Details

Type

Article

Created At

24 Dec 2024