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376648

MOLECULAR DETECTION OF VIRULENCE GENES FOR LISTERIA MONOCYTOGENES ORGANISM ISOLATED FROM RAW MILK AND SOME LOCALLY MADE MILK PRODUCTS

Article

Last updated: 28 Dec 2024

Subjects

-

Tags

Milk hygiene & milk product

Abstract

This study was designed to find out the prevalence of Listeria monocytogenes in raw milk and some dairy products and the molecular identification of their virulence genes. One hundred and twenty samples in all, including milk, Kareish cheese, and yogurt (40 of each), were gathered randomly from various sources for this study and examined for the presence of Listeria monocytogenes. Eight distinct strains of L. monocytogenes were identified and molecularly examined for 16 srRNA-specific genes for Listeria monocytogenes, as well as the identification of many pathogenicity genes (inlA, inlB, hlyA, and prfA genes). All eight isolates harbored 16srRNA-specific genes for Listeria monocytogenes; seven isolates harbored both inlA and inlB; six isolates harbored hlyA; and five isolates harbored the prfA gene. The results of antimicrobial susceptibility testing showed high sensitivity to Ciprofloxacin (CP), Gentamycin (CN), Vancomycin (VA), Doxycycline (DO), and Trimethoprim-sulfamethoxazole (SXT) with 100, 87.5, 87.5, 78.5, and 62.5%, respectively, while showing high resistance to Ampicillin (AM), Amoxicillin (AX), Oxicillin (OX), Erythromycin (E), Lincomycin (L), and Ceftriaxone (CRO) with 100, 100, 100, 100, and 75%, respectively. All eight Listeria monocytogenes isolates were multidrug-resistant, holding a variety of antibiotic resistance indexes (MARI) in the range of 0.417–0.833. In conclusion, the study's findings highlight the necessity of implementing more stringent sanitary control procedures, particularly while processing, storing, and marketing dairy products. The pasteurization temperatures must not be less than 85 °C, where only 85% of the bacteria are destroyed by pasteurization at 71–75 °C for 15 seconds. 

DOI

10.21608/avmj.2024.303681.1302

Keywords

Listeria monocytogenes, Virulence genes, milk products, PCR

Authors

First Name

O.A.

Last Name

SADEK

MiddleName

-

Affiliation

Department of Food Hygiene, Assiut Provincial Lab., Animal Health Research Institute, Agricultural Research Center (ARC), Egypt.

Email

onsi_2000@yahoo.com

City

-

Orcid

-

First Name

A.

Last Name

KORIEM

MiddleName

M.

Affiliation

Bacteriology Department, Assiut Provincial Lab., Animal Health Research Institute, Agricultural Research Center (ARC), Egypt.

Email

ayman_koriem@yahoo.com

City

-

Orcid

0000-0002-2904-3827

First Name

S.H.

Last Name

AL-HABATY

MiddleName

-

Affiliation

Bacteriology Department, Assiut Provincial Lab., Animal Health Research Institute, Agricultural Research Center (ARC), Egypt.

Email

-

City

-

Orcid

-

First Name

ZEINAB

Last Name

ABDEL HAMEED

MiddleName

M.

Affiliation

Department of Food Hygiene, Assiut Provincial Lab., Animal Health Research Institute, Agricultural Research Center (ARC), Egypt.

Email

-

City

-

Orcid

-

Volume

70

Article Issue

183

Related Issue

49234

Issue Date

2024-10-01

Receive Date

2024-07-24

Publish Date

2024-10-01

Page Start

145

Page End

165

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_376648.html

Detail API

https://avmj.journals.ekb.eg/service?article_code=376648

Order

13

Type

Research article

Type Code

1,840

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

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

MainTitle

MOLECULAR DETECTION OF VIRULENCE GENES FOR LISTERIA MONOCYTOGENES ORGANISM ISOLATED FROM RAW MILK AND SOME LOCALLY MADE MILK PRODUCTS

Details

Type

Article

Created At

28 Dec 2024