الفهرس 
Chapter I : IntroductionOnly 14 pages are availabe for public view
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Abstract
. A total of one hundred and forty samples of dairy products Kariesh cheese, Roumy cheese, liquid yoghurt and butter (35 of each) which were collected from different localities at Kaliobia governorate. The mycological examination revealed that:
I. Kariesh cheese:
The positive samples were 23/out of 35 representing 65.7%, the minimum count of mould and yeast/gm were 5 102, wherever the maximum were 1.2 x 105, with mean value of 3.4 103 ± 1.7 103/gm.
Incidence of the isolated mould from kariesh cheese were belonging to Penicillium and Aspergillus which were the most prevalent ones. While the Cladosporium, were isolated at relatively lower percentage. The species of isolated mould were Pencillium digitatum, Penicillium verrucosum, Aspergillus terreus and Aspergillus niger .
The isolated yeast were Candida, Rhodotorula and Saccharomyces. The isolated straines of yeast were Candida albicans and Saccharomyces lactis.
II. Roumy cheese:
The positive samples were 26/out of 35 representing 74.2%, The minimum count of mould and yeast/gm 17 102 where the maximum were 8 x 105 with average of 4.7 105 ± 2.26 x 105.
The incidence of the isolated yeast and mould from Roumy cheese were the mould belonging to Aspergillus and Fusarium species were the most predominant species. While Penicillium, Alternaria, Cladosporium, Saccharomyces, Candida and Rhodotorula species were represented by lower percentage. The Aspergillus species were Aspergillus niger and Aspergillus flavus. The Penicillium species were Pencillium camemberti and Penicillium chrysogenum.
III. Liquid yoghurt:
The positive ones were 11 representing 31.92% the minimum mould and yeast count/gm were 710 while maximum were 3 104/gm with average of 5.3 103 ± 3.3 103.
The mycological examination revealed that. Aspergillus species were the most prominent isolates representing 36.29% followed by penicillium species 19.91% while mucor were 17.14%, Cladosporium spp. 5,71%, Alternaria alternate 8.58 % and Rhodotorula glutinis 14.28%.
IV. Butter:
The positive ones were 29 representing 82.8% of the all. The minimum mould and yeast count/gm were 11 103 while maximum were 9 106/gm with average of 6.6 105 ± 4.1 105.
The incidence of the isolated yeast and mould from examined butter as follow:
Penicillium followed by Aspergillus species were commonly represented the most prevalent species. Cladosporium and Candida were present by remarkedable percentage while Mucor, Rhodotorula species were occurred in relatively lower percentage.
The Penicillium species were Penicillium citrinum and Penicillium clavigenrum. The Aspergillus species were Aspergillus fumigatus and Aspergellus flavus and Aspergillus terreus.
The isolated Candida species were Candidia tropicalis and Candida albicans.