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170772

EVALUATION OF SOME FERMENTED MILKS SOLD IN ALEXANDRIA CITY

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Last updated: 23 Jan 2023

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Abstract

One hundred and twenty random samples of some locally manufactured fermented dairy products including; plain yoghurt, stirred yoghurt, flavored yoghurt, baladi rayeb, sterilized rayeb and Labnah (20 each) were collected from local markets in Alexandria city to be examined for their sanitary and microbiological evaluation. The obtained results clarified that the mean value of the titratable acidity was 0.83±0.007, 0.65±0.01, 0.68±0.011, 0.89±0.005, 0.66±0.01 and 0.14±0.08 %, respectively. In addition, the mean value of coliforms count cfu/g was 4.10×102± 20; <10; 1.72×102± 21; 1.65×103± 2.69×102; <10 and 6.10×102± 64, respectively. The isolated coliforms species were Citrobacter freundii, E.coli, Enterobacter aerogenes, Enterobacter cloacae, Proteus vulgaris, Edwardsiella tarda and Klebsiella pneumoniae. None of them was isolated from stirred yoghurt and sterilized rayeb. The mean value of Staph. aureus count cfu/g was 22 ±5; 20± 10; 64± 45; 7.23×102± 54; 2.1×102± 21 and 95± 12, respectively. The mean value of Enterococci count cfu/g was 1.25×102± 12; 1.25×102± 23.2; 1.21×102± 11; 4.25×102± 1.97×102; 22.5± 13 and 1.66×103± 6.6×102, respectively. Moreover, the yeasts and molds counts were performed. The mean value of yeasts count cfu/g was 7.87x104± 6.89x104; 5.83x103± 3.68x103; 2.16x103± 6.54x102; 1.26x104± 3.55x103; 9.11x103± 3.82x103 and 1.28x103± 0.79x 102, respectively. While the mean value of molds count cfu/g was 5.88x104± 4.06x104;  2.60x103±1.12x103; 7.57x103± 4.72x103; 2.92x103± 4.38x102; 3.00x103± 1.41x103 and 2.75x103± 1.12x103, respectively. It could be concluded that the majority of the investigated fermented dairy products were contaminated, at different degrees, with coliforms, Staph. aureus, yeasts and molds giving an indication of poor sanitary measures adopted during manufacturing, storage, handling and distribution of these products. In addition, it was observed that baladi rayeb and Labnah had lower quality than the other examined fermented dairy products.  

DOI

10.21608/avmj.2017.170772

Keywords

Fermented dairy products, Sanitary Evaluation, microbiological evaluation

Authors

First Name

AHLAM,

Last Name

EL LEBOUDY

MiddleName

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Affiliation

Professor of Milk Hygiene, Department of Food Hygiene, Fac. Vet. Med. Alexandria. Univ

Email

mido_15158@hotmail.com

City

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Orcid

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First Name

AMR,

Last Name

AMER

MiddleName

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Affiliation

Professor of Milk Hygiene, Department of Food Hygiene, Fac. Vet. Med. Alexandria. Univ.

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City

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Orcid

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First Name

MARIA,

Last Name

EL-ANSARY

MiddleName

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Affiliation

Lecturer of Milk Hygiene, Department of Food Hygiene, Fac. Vet. Med. Alexandria. Univ

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City

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First Name

EL ASUOTY,

Last Name

M.S

MiddleName

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Affiliation

Researcher of Food Hygiene Unit, Animal Health Research Institute, Damanhur branch

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City

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Orcid

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First Name

MARWA,

Last Name

AHMIDA

MiddleName

-

Affiliation

Researcher at Department of Food Hygiene, Fac, of Vet, Med, Alexandria, Univ.

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City

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Orcid

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Volume

63

Article Issue

154

Related Issue

24314

Issue Date

2017-07-01

Receive Date

2017-05-31

Publish Date

2017-07-25

Page Start

59

Page End

66

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_170772.html

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https://avmj.journals.ekb.eg/service?article_code=170772

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7

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