Document Type : Research article
Authors
1
Dept. of Food Hygiene, Animal Health Research Institute, Alex., Lab., Egypt
2
Dept. of Bacteriology, Animal Health Research Institute, Alex., Lab., Egypt.
Abstract
75 samples of raw milk, small scale ice cream and large scale ice cream (25 each) were collected from
different supermarkets and street vendors in Alexandria city, Egypt and examined bacteriologically for the
presence of some food poisoning organisms. Psychrotrophic, Coliform, Staphylococcus and Enterococci were
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present with a mean value of (9.4x108, 7.5x105and 3x102), (1.0x104, 5.6x102 and 0.0), (16.38x103, 8.9 x 10 3
and 0.0) and (6.9x102, 1.6x102 and 7.3x10) in the examined raw milk, small scale and large scale ice cream
samples, respectively. E. coli, Klebsiella spp., Enterobacter spp., Pseudomonas spp., Yersinia spp., Aeromonas
hydrophila improving the quality of the product were discussed. Staphylococcus aureus and Enterococci could
be isolated at varying percentages from the examined samples. The Enteropathogenic E. coli could be
isolated from 96% and 20% from raw milk and small scale ice cream samples and identified serologically as
: K66, O112: K66, O111: K58, O114 : K90, O78 : K80, O124 : K72, O128 : K67 and O26 : K60. The public health significance
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and economic importance of existing food poisoning organisms as well as suggestive measure for improving
the quality of the product were discussed.
Keywords
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