الفهرس 
APPROVAL SHEETOnly 14 pages are availabe for public view
 |  | from | 238 |  |  |
| | | from | 238 | | |
Abstract
ALV - J has caused great economic losses in Egypt with high incidence of myeloid leukosis during 1998 - 2000This study describes the incidence and prevalence of ALV - J among chicken flocks in Egypt during the period of 2001 - 2004 In this study , clinical cases of ML were still found in different broiler breeder flocks during 2001 - 2004 and even in one broiler grandparent flock during 2003 and the results of histopathology , serology for ALV - J antibodies , viral isolation and PCR for ALV - J revealed that 14 / 19 flocks were affected with ALV - JAlso ALV - J has been emerged recently in egg - type chickens in Egypt in 2002 causing tumors of ML associated with decrease.