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316723

Molecular detection of Salmonella isolated from eggs and egg-based products

Article

Last updated: 05 Jan 2025

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Tags

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Abstract

This study aimed to investigate the prevalence of Salmonella in eggs and some egg-based products in Sohag city, Egypt. 120 samples of hen's eggs (Baladi & farm), mayonnaise and cream cake were examined for conventional and molecular detection of Salmonella. The samples were divided into egg-shell Baladi, egg-content Baladi, egg-shell farm, egg-content farm, mayonnaise and cream cake (20 each). All the samples were subjected for conventional enrichment culture. 25 g of each sample was added to 225 ml of 1% buffered peptone water and incubated at 37°C for 24 hours, one ml of the enriched media was then transferred to Rappaport-Vassiliadis broth and incubated at 40°C for 48h. A loopful was then streaked on Salmonella-Shigella agar to look for colorless colonies with a black center. Biochemical identification was performed using triple sugar iron agar test, lysin iron agar test and urease test. The results of conventional culture showed that 30% of egg-shell Baladi, 10% of egg-content Baladi, 20% of egg-shell farm and 15% of egg-content farm samples were positive for Salmonella. However, all of the mayonnaise and cream cake samples were Salmonella-free. The Salmonella isolates were then identified using PCR. The results by PCR showed that Salmonella were detected from 30% of egg-shell Baladi, 5% of egg-content Baladi, 15% of egg-shell farm and 10% of egg-content farm samples. Salmonella Enteritidis was isolated from only one sample of egg-shell Baladi and only one sample of egg-content farm, while no Salmonella Typhimurium was isolated from any of the samples.

DOI

10.21608/jamb.2023.217826.1004

Keywords

Salmonella, Eggs, mayonnaise, cream cake (Jatooh)

Authors

First Name

Rania

Last Name

Kamaly

MiddleName

Maher

Affiliation

Molecular Biology Research & Studies Institute, Assiut University, Egypt

Email

rania.maher.kamaly@gmail.com

City

-

Orcid

-

First Name

Rania

Last Name

Ewida

MiddleName

Mohammed

Affiliation

Faculty of Veterinary Medicine, New Valley University, New Valley, Egypt.

Email

r_ewida@yahoo.com

City

Assiut

Orcid

-

First Name

Mohammed

Last Name

Sayed

MiddleName

-

Affiliation

Faculty of Veterinary Medicine, Assiut University, Egypt.

Email

dr.mohammedsayed@yahoo.com

City

Assiut

Orcid

-

Volume

1

Article Issue

1

Related Issue

43423

Issue Date

2023-09-01

Receive Date

2023-06-15

Publish Date

2023-09-01

Page Start

1

Page End

11

Online ISSN

2974-4008

Link

https://jamb.journals.ekb.eg/article_316723.html

Detail API

https://jamb.journals.ekb.eg/service?article_code=316723

Order

316,723

Type

Original Article

Type Code

2,814

Publication Type

Journal

Publication Title

Journal of Applied Molecular Biology

Publication Link

https://jamb.journals.ekb.eg/

MainTitle

Molecular detection of Salmonella isolated from eggs and egg-based products

Details

Type

Article

Created At

20 Dec 2024