421169

ISOLATION AND IDENTIFICATION OF ENTEROTOXIGENIC HALOPHILIC BACTERIA IN SOME PICKLED DAIRY PRODUCTS IN ASSIUT GOVERNORATE, EGYPT

Article

Last updated: 27 Apr 2025

Subjects

-

Tags

Milk hygiene & milk product

Abstract

A total of one hundred and twenty random samples of pickled Domiati and Kareish cheese (60 each) during the period from May 2023 to June 2024 were collected from dairy shops and markets in Assiut governorate, Egypt; for isolation and identification of enterotoxigenic halophilic bacteria in some pickled dairy products. The results showed that salt concentration in Domiati and Kareish cheese ranged from 2.6 and 2.9 to 6.8 and 12.9 with a mean value of 5.1 and 9.2, respectively. The pH values ranged from 2.7 and 3.4 to 5.1 and 7.9, with a mean value of 4.1 and 5.2, respectively. On the other hand, the count of halophilic bacteria in examined pickled Domiati and Kareish cheese samples recovered on halophilic agar containing 3% salt ranged from <102  and <102 to 1.5x105 and 1.03x104, with a mean value of 1.8x104 ±0.63x104 and 1.1x103 ±0.42x103, respectively.  Corresponding counts on halophilic agar containing 10% NaCl ranged from 1.3x10and 0.23x102  to 1.45x106 and  2.1x104, with a mean value of 0.8x105 ±0.62x105 and 0.56x104 ±0.81x103, respectively. The isolates were identified biochemically as Staph. aureus, S. epidermidis, Micrococci spp., B. cereus, B. licheniformis, and B. coagulence, B. subtilis, B. mycoids, E. coli and Proteus species, and only 31 samples (46.3 %) out of 67 examined S. aureus samples identified as coagulase positive. The Polymerase Chain Reaction (PCR) for coagulase positive S. aureus and B. cereus showed that 19 (61.3%) and 25 (30.9%) samples were enterotoxigenic halophiles, respectively. Some of these halophilic bacteria, such as Staph. Aureus, B. cereus, E. coli and proteus are of public health hazards which cause several food poisoning outbreaks. So, milk must come from dairy farms and apply HACCP system and strict hygiene during processing, storage and handling and finally periodical examination of milk, and dairy products chemically and bacteriologically must be applied.

DOI

10.21608/avmj.2025.316971.1377

Keywords

Pickled dairy products, halophilic, Staph. Spp, Bacillus spp, Enterotoxigenic, PCR

Authors

First Name

MOHAMED M.

Last Name

SHAHATA

MiddleName

M.

Affiliation

Department of Environmental Affairs, Assiut University Hospitals, Assiut University

Email

mohamedshahata67@hotmail.com

City

-

Orcid

-

First Name

YASSER

Last Name

WAFY

MiddleName

S.

Affiliation

Department of Nutrition, Assiut University Hospitals, Assiut University

Email

yasserwafy2014@yahoo.com

City

-

Orcid

-

Volume

71

Article Issue

185

Related Issue

55112

Issue Date

2025-04-01

Receive Date

2024-09-09

Publish Date

2025-04-01

Page Start

31

Page End

41

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_421169.html

Detail API

http://journals.ekb.eg?_action=service&article_code=421169

Order

3

Type

Research article

Type Code

1,840

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

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

MainTitle

ISOLATION AND IDENTIFICATION OF ENTEROTOXIGENIC HALOPHILIC BACTERIA IN SOME PICKLED DAIRY PRODUCTS IN ASSIUT GOVERNORATE, EGYPT

Details

Type

Article

Created At

27 Apr 2025