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345005

Molecular Identification and Characterization of Salmonella Sp. In Raw and Heat-Treated Milks from Local Market

Article

Last updated: 24 Dec 2024

Subjects

-

Tags

Genetics and Biotechnology

Abstract

Milk is a valuable nutritious food that has a short shelf life and requires careful handling. Therefore, milk is rapidly perishable as it is a suitable medium for the growth of microorganisms particularly; bacterial pathogens that can cause milk spoilage and diseases in consumers. This study aimed to determine the prevalence of Salmonella sp. in raw and heat-treated milk, characterize its virulence-associated genes, and assess its antimicrobial profile. One hundred and thirty samples (50 raw cow's milk, 50 raw buffalo's milk, 10 Heat-treated milk (pasteurized), 20 Heat-treated milk (UHT)) were used for assessing the prevalence of Salmonella sp. Four Salmonella isolates were recovered from Raw cow's milk (4/9; 8%) and five from Raw buffalo's milk (5/9; 10%) while no isolates of salmonella sp. were detected from heat-treated milk. Moreover, the antimicrobial susceptibility testing indicated that all isolates were resistant to Amoxicillin/clavulanic acid (AMC 30) 20/10μg, Erythromycin (E15) 15μg and Cephalexin (CL30) 30μg whilst they are all sensitive to Chloramphenicol (C30) 30μg. The PCR results revealed that the six virulence genes (invA, orgA, sifA, spvA, iroN and spiA) were detected significantly in all nine isolates. Further, the results of ARDRA technique revealed that all isolates belonging to salmonella enterica and was validated using the real time- PCR. Our results indicate that insufficient hygienic measures adopted during handling. Therefore, the strict hygienic approaches are recommended during milking and processing.

DOI

10.21608/assjm.2024.253296.1259

Keywords

bacterial pathogens, Virulence- associated genes, Antimicrobial profile, Salmonella sp

Authors

First Name

Neven

Last Name

Rashad

MiddleName

S. A.

Affiliation

Department of Genetics and Genetic Engineering, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt.

Email

neven.salah@fagr.bu.edu.eg

City

Toukh

Orcid

-

First Name

Mohamed

Last Name

Refaat

MiddleName

Hassan

Affiliation

Department of Genetics and Genetic Engineering, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt.

Email

mohamed.refaat@fagr.bu.edu.eg

City

Toukh

Orcid

0000-0002-1555-3754

First Name

Elsayed

Last Name

Ismail

MiddleName

Elsayed Ali

Affiliation

Dairy Science department, Faculty of Agriculture, Benha university , Egypt

Email

e.ismail@fagr.bu.edu.eg

City

Benha

Orcid

0000-0002-4297-8862

First Name

Fathia

Last Name

Soudy

MiddleName

A.

Affiliation

Department of Genetics and Genetic Engineering, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt.

Email

soudy@fagr.bu.edu.eg

City

-

Orcid

0000-0001-8451-193x

Volume

61

Article Issue

3

Related Issue

46543

Issue Date

2023-09-01

Receive Date

2023-12-05

Publish Date

2023-09-01

Page Start

611

Page End

630

Print ISSN

1110-0419

Online ISSN

2974-4830

Link

https://assjm.journals.ekb.eg/article_345005.html

Detail API

https://assjm.journals.ekb.eg/service?article_code=345005

Order

345,005

Type

Original Article

Type Code

841

Publication Type

Journal

Publication Title

Annals of Agricultural Science, Moshtohor

Publication Link

https://assjm.journals.ekb.eg/

MainTitle

Molecular Identification and Characterization of Salmonella Sp. In Raw and Heat-Treated Milks from Local Market

Details

Type

Article

Created At

24 Dec 2024