Investigation of Infectious Laryngotracheitis Virus in Broiler Flocks in Sulaymaniyah Province, Iraq


 Infectious laryngotracheitis (ILT) is an acute contagious upper respiratory tract infection of ‎chickens and other birds, caused by Gallid herpesvirus1 (GaHV-1), which has economic ‎importance in the poultry industry. There was no scientific data about incidence ‎disease broiler farms Sulaymaniyah province/Iraq. Therefore, this study aimed to ‎investigate ILTV that region. Clinically infected birds from 89 ‎broiler flocks had distress, coughing, gasping, tracheal rales, nasal ocular ‎discharge, congested trachea with purulent exudate, hemorrhagic tracheitis with/or without ‎necrotic changes were investigated. The DNA extracted pooled samples, ‎including secretion, trachea, lung tissue. Primers specific thymidine kinase ‎gene (tdk) ILTV- used PCR detect virus. A phylogenic tree generated ‎track virus’s origin. revealed rate among ‎farms 2.2% (2/89) sequencing analysis showed isolated ‎the area closely related reported strains United States Brazil (MN643591.1 ‎and S83714.1); a sequence identity 98.27% taxon ‎JQ217378.1. In conclusion, one causes viral ‎infection even at younger ages ILTV. Partially sequenced tdk virus circulated serovar region some nucleotides ‎amino acids differences worldwide serovars. This should be taken into ‎consideration industry doing further investigation‎.