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169995

MICROBIOLOGICAL EVALUATION OF SOME DRIED DAIRY DRINKS SOLD IN ASSIUT CITY

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Last updated: 23 Jan 2023

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Abstract

This study was aimed to evaluate some dried dairy drinks as salep, hot chocolate and coffee milk powder. A total of 75 random samples (25 each) were purchased from different dairy shops and supermarkets in Assiut city, Egypt. Each sample was microbiologically examined in both forms; powdered form (as it was packed) and reconstituted form (as manufacturing instructions) as well as isolation of Bacillus cereus and detection of its toxigenic genes (cytK, and hblC) using PCR technique was performed. The obtained results showed that the average psychrotrophic counts in the powdered form were 1.2x103, 3.6x102 and 80cfu/g, respectively; and the counts in the reconstituted form were 1.25x104, 1.69x104 and 7.8x103cfu/g, respectively. Moreover, the average thermophilic counts in the powdered form were 2.68x103, 40 and 40 cfu/g, respectively; and in the reconstituted form were 6.8x102,40 and <10 cfu/g, respectively. The average counts of total yeasts and molds in the powdered form of the examined samples were 1.72X103, 1.6X102 and 1.01X103 cfu/g, respectively, and the counts in the reconstituted form were 9.6X102, 9.2X102 and 2.6X103 cfu/g, respectively. Regarding the total Bacillus count, the average counts in the powdered form were 4x102, 3.2x102 and 40cfu/g, respectively;1.8x103, 1.96x103 and 2x102cfu/g were the counts in the reconstituted form, respectively. In addition, identification of the isolated Bacillus species was performed and recorded in the previous products. By using PCR, twenty eight strains of the isolated B. cereus were enterotoxigenic.

DOI

10.21608/avmj.2016.169995

Keywords

Key words: Salep, Hot chocolate, Coffee milk powder, Enterotoxigenic B. cereus

Authors

First Name

MARWA

Last Name

M.N. EL-GENDI

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Affiliation

Animal Health Research Institute (Assiut Provincial Lab.) Food Hygiene Department

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First Name

ZEINAB

Last Name

ABDEL-HAMEED

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Affiliation

Animal Health Research Institute (Assiut Provincial Lab.) Food Hygiene Department

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Volume

62

Article Issue

150

Related Issue

24318

Issue Date

2016-07-01

Receive Date

2016-07-28

Publish Date

2016-06-01

Page Start

98

Page End

106

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_169995.html

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https://avmj.journals.ekb.eg/service?article_code=169995

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14

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