الفهرس 
Approval SheetOnly 14 pages are availabe for public view
 |  | from | 212 |  |  |
| | | from | 212 | | |
Abstract
The study applied on 20 broiler farms in period from June 2006 to May 2007 to study the causes of Biosecurity failure in some raising farms (Broiler farms), the end result revealed that. 1 -the importance of biosecurity in poultry production , to minimize the spreading of the disease and to increase the productive performance of such farms. 2-There was some failures in biosecurity measures application which led to increasing the mortality rate and reducing productive performance. 3 -Results revealed that the ability to evaluate and measure the biosecurity level application in open sided broiler farms to minimize the risk of failure and maximize the productive performance. 4- from the result appeared that the importance of disinfectiion process in success of biosecurity programms and maximized broiler performance .Also the vaccination program play important role in increasing or decrease the final body weight and mortality rate of broiler chicks.