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182719

HALOPHILIC BACTERIA IN SOME DAIRY PRODUCTS SOLD IN ASSIUT CITY

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Last updated: 23 Jan 2023

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Abstract

A total of 200 random samples of pickeled Damietta, pickeled kareish cheese, mish and kishk (50 each) were collected from different markets and shops in Assiut City. The average pH values of the examined samples were 4.64, 5.17, 5.32 and 4.11, while the average values of NaC1% were 9.88, 10.55, 11.81 and 7.32, of the examined samples, respectively. The samples were examined for numbers and types of halophilic bacteria. It was found that all of the examined samples contained (100%) halophilic bacteria using halophilic agar either containing 3% or 10% salt. The average numbers of halophilic bacteria recovered on halophilic agar containing 3% salt were 99x104, 17x104, 29x10, 9x104 /g of the examined pickled Damietta, kareish cheese, mish and kishk samples respectively. Crresponding counts on halophilic agar containing 10% NaCl were 31x10, 62x105, 25x104 and 13x10 g of the examined samples, respectively. Seven hundred (700) isolates were recovered from the examined samples in different percentages. These isolates were identified biochemically as S.aureus, S.epidermidis, Micrococci, B.cereus, B.licheniformis, B. coagulence, B. subtilis, B. mycoids, E. coli and Proteus species. However, S. aureus, Staph.epidermedis, micrococci, E. coli and Proteus species failed to recover from the examined kishk samples. Enterotoxigenicity of S.aureus isolates reveal that 24 (24.8% out of 97 strains recovered from the examined samples were found to produce enterotoxins A, B, AB, BC and ABC in numbers of 9, 6, 4,3 and 2 strains, respectively. B.cereus could be isolated from pickeled Damietta, pickeled kareish, mish and kishk samples in different percentages. Diarrheal enterotoxin was produced by 38% of the tested B.cereus strains including 18, 9, 6, 5 out of 43, 22, 19 and 16 B.cereus isolates recovered from the examind samples, respectively. The public health hazard of these pathogens and preventive measures were discussed.

DOI

10.21608/avmj.1999.182719

Keywords

Key words: Halophilic, dairy, sold

Authors

First Name

M.S.

Last Name

Sabreen

MiddleName

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Affiliation

Dept. of Food Hygiene Fac. Vet. Med., Assiut University

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Orcid

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First Name

E.H.

Last Name

Abdel-Hakim

MiddleName

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Affiliation

Dept. of Food Hygiene, Fac. of Vet. Med., Suez Canal Univ.

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City

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Orcid

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First Name

Amal

Last Name

Ali Abd El-Haleem

MiddleName

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Affiliation

Animal Health Research Institute, Assiut

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Volume

42.1

Article Issue

83

Related Issue

26271

Issue Date

1999-10-01

Receive Date

1999-08-02

Publish Date

1999-10-01

Page Start

158

Page End

173

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_182719.html

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https://avmj.journals.ekb.eg/service?article_code=182719

Order

11

Type

Research article

Type Code

1,840

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

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

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Article

Created At

23 Jan 2023