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246980

Incidence of Chryseobacterium spp. in raw milk and some dairy products

Article

Last updated: 03 Jan 2025

Subjects

-

Tags

Animal hygiene, Nutrition and Food Hygiene (Animal and Poultry hygiene…gy and control, Zoonotic diseases, and Animal and clinical nutrition.

Abstract

A total of 225 random samples of raw cow milk (150), Kareish cheese, Domiati cheese and butter (25 samples each), were collected from various farmers' houses, dairy shops, street vendors and supermarkets located at Aswan city, Egypt, to be examined by culture and molecular methods in which 16S rRNA gene was used; the obtained PCR product was then purified and sequenced to detect the existence of Chryseobacterium spp. All cheese and butter samples didn't show the characteristic colonies of Chryseobacterium spp., while two raw cow milk samples exhibited the characteristic Chryseobacterium colonies. The suspected Chryseobacterium spp. were confirmed by PCR and DNA sequencing and comparing the sequenced DNA with those on GenBank using the BLAST tool on GenBank, underlining its occurrence in raw cow milk samples with an incidence of 1.3%. The isolated strains showed the highest similarity with Chryseobacterium jip 108/83 (100%). According to obtained data and our knowledge, it is the first time to isolate Chryseobacterium spp. from raw milk in Egypt. The isolated strains were registered on the GenBank with the proposed names Chryseobacteriu Egyam strain AM1 (Accession No. MK059947) and Chryseobacterium Egyam strain AM2 (Accession No. MK059948). A constructed phylogenetic tree by using the neighbour-joining method was applied to detect the exact taxonomic position of the obtained strains.

DOI

10.21608/svu.2022.114720.1170

Keywords

Chryseobacterium spp, Milk, 16S rRNA

Authors

First Name

Amal S.

Last Name

Mohamed

MiddleName

-

Affiliation

A post-graduate researcher, Department of Food Hygiene and Control, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt

Email

amhnl2017@gmail.com

City

-

Orcid

-

First Name

Laila M.

Last Name

El-Malt

MiddleName

-

Affiliation

Department of Food Hygiene and Control, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt

Email

lailael.malt@ymail.com

City

-

Orcid

-

First Name

Karima G.

Last Name

Abdel Hameed

MiddleName

-

Affiliation

Department of Food Hygiene and Control, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt

Email

karima_galal@vet.svu.edu.eg

City

-

Orcid

0000-0002-8282-7858

First Name

Mona A.

Last Name

El-Zamkan

MiddleName

-

Affiliation

Department of Food Hygiene and Control, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt

Email

moon_zam@outlook.sa

City

-

Orcid

0000-0002-7155-3732

Volume

5

Article Issue

2

Related Issue

32709

Issue Date

2022-06-01

Receive Date

2022-01-12

Publish Date

2022-06-01

Page Start

77

Page End

90

Print ISSN

2535-1826

Online ISSN

2535-1877

Link

https://svu.journals.ekb.eg/article_246980.html

Detail API

https://svu.journals.ekb.eg/service?article_code=246980

Order

8

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

Incidence of Chryseobacterium spp. in raw milk and some dairy products

Details

Type

Article

Created At

22 Jan 2023