Vol. 11, Issue 12 (2022)

Author(s):
R Ravikumar, J Selvaraj and D Ilayabharathi

Abstract:
Fifteen dead commercial layer birds of 45 weeks age were examined to know the cause of death. The total flock size was 25,000 and birds were raised in cages from day one of age. The total mortality over a period of 15 weeks was 15%. The birds appeared weak and emaciated. At necropsy, liver, spleen, kidney revealed enlargement, mottling, greyish spots/foci with tumour nodules. The tumours were firm in consistency and smooth when cut. Histopathology of liver and kidney were corroborated the gross lesions. Lymphoid leucosis (LL) was confirmed by conducting polymerase chain reaction (PCR).