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166830

SURVEILLANCE OF METHICILLIN RESISTANT STAPHYLOCOCCUS AUREUS (MRSA) IN RAW MILK AND MILK HANDLERS WITH NUC GENE SEQUENCING OF THE ISOLATED STRAINS

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Last updated: 28 Dec 2024

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Abstract

The emergence and spread of methicillin resistant Staphylococcus aureus (MRSA) infections are considered a global health issue. This study was designed to determine the prevalence of MRSA in milk from dairy herds and markets. The role of milk handlers as a source of MRSA infection had been studied. Genotyping of the isolated MRSA strains was investigated. A total of 100 samples of farm milk and market milk (50 each) as well as 30 hand swabs of milk handlers were collected randomly from Assiut Governorate. Methicillin resistant Staphylococcus aureus was isolatedand enterotoxigenic strains were investigated. Polymerase chain reaction (PCR) was performed to amplify the nuc gene in the isolated strains. Moreover, sequencing of the amplified PCR products and phylogenetic analysis was performed. MRSA strains were isolated from 13.85% of the examined samples (22% and 8% of the examined farm and market milk, respectively) and 55.6% of the isolated MRSA strains were enterotoxigenic. In this study, staphylococcal enterotoxin C was the most enterotoxin detected in the isolated MRSA strains with a rate of 90%. However, enterotoxin type B was detected in 10% of the isolated MRSA strains. In addition, 25% of MRSA strains isolated from market milk were enterotoxigenic with one strain belong to type C. Enterotoxigenic MRSA strains were isolated with a rate of 66.7% from milk handlers and enterotoxin type C was the type of toxin produced by these strains. Nuc gene was detected in 5 (27.8%) out of the 18 MRSA strains. Phylogenetic analysis of the amplified products sequences was done and the results were discussed. Public health hazard of MRSA was discussed and suggestive measures for control were explained.

DOI

10.21608/avmj.2010.166830

Keywords

MRSA, Milk, milk handler, PCR, nuc gene, Sequencing

Authors

First Name

AMAL

Last Name

SAYED

MiddleName

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Affiliation

Dept. of Animal Hygiene and Zoonoses, Fac. Vet. Medicine, Assiut Univ.

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Orcid

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First Name

ASMAA

Last Name

HUSSEIN

MiddleName

-

Affiliation

Dept. of Animal Hygiene and Zoonoses, Fac. Vet. Medicine, Assiut Univ.

Email

sfhaae@yahoo.com

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Orcid

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Volume

56

Article Issue

127

Related Issue

24341

Issue Date

2010-10-01

Receive Date

2010-09-04

Publish Date

2010-10-01

Page Start

1

Page End

12

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_166830.html

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https://avmj.journals.ekb.eg/service?article_code=166830

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1

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

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

MainTitle

SURVEILLANCE OF METHICILLIN RESISTANT STAPHYLOCOCCUS AUREUS (MRSA) IN RAW MILK AND MILK HANDLERS WITH NUC GENE SEQUENCING OF THE ISOLATED STRAINS

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Article

Created At

23 Jan 2023