الفهرس 
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Abstract
160 Samples of egg, 100 samples of cloacal swabs and 75 samples of litter were collected from a farm of laying hens locatted at Behera proviance and examined bacteriologically and mycologically to evaluate their sanitary quality.
A-The ambient temperatureAi
The ambient temperature inside the investegated poultry houses was
22.1÷/-1.2 c0
B-The relative humklitv(%):
The mean value of relative humidity inside investegated poultry houses was 66.6+1-2.3.
C-Bcterio1o,ica1 Examinatirn Qf Examined
Samples
1-The Bacteriological Examination of Egg Samples: Th bacteriological examination of egg samples revealed the isolation of deffirent speacies of pathogenic and potentially pathogenic bacteria including Salmonella sp.\%), igà p\2,
Arizona(45%), Proteus Morbi1isU%, E.co1i(3%, Ctro bactet(4%, Entero bacter aerogenenus (10%), Entero bacter-cloaca(20%), Edwarsiella (3%), Providencia (2%), and Entero bacter hofnia(18%),Staphylo cocci(35%), Strepto coccus faecalis var faecalis(11%), Strepto coccuc durance(12%), Strepto coccus var liqufecanis (12%), and Micro coccus (12%).
2-Bacteriological Examination of Cloacal Samples: Th bacteriological examination of cloacal swabs revealed the isolation of Salmonella sp.(2%), Shigella(13%), Arizona(8%), E.coli(5%), Proteus morbilis (3%), C itro bacter( 1%), Entero bacteraero genus (3%),