The Development of Families of Chickens Free of Lymphomatosis

Breeding for Resistance and Susceptibility to Avian Lymphomatosis

“…However, at the end of 300 days no measurable association for resistance or susceptibility to lymphomatosis existed between inoculated and non-inoculated chickens of the same family. In addition numerous cases of lymphomatosis occurred among the non-inoculated controls during the first 300 days of age, Waters and Prickett (1944). Therefore, all selection criteria for the past five years have been baSed on factors other than those associated with inoculated birds.…”

“…Any value in selection which might have resulted from the 1939 hatched parents which were chosen to produce the second, or 1940 population, was completely masked in that over half of the families obtained during this year were destroyed prior to 100 days of age in an attempt to control the high lymphomatosis mortality; see Waters and Prickett (1944). Reference to Figure 2 will show the relatively high viability up to 300 days of age of the 1940 birds which occurred as a result of discarding entire families showing early cases of lymphomatosis.…”

Effects of DHAV-3 infection on innate immunity, antioxidant capacity, and lipid metabolism in ducks with different DHAV-3 susceptibilities

“…Improving the disease resistance of poultry at the genetic level will be a better solution toward the disease. Disease resistant breeding started early in chicken, it was found that chickens are resistant to salmonellosis, leukemia, and Eimeria ( Taylor et al, 1943 ; Waters and Prickett, 1944 ; Johnson and Edgar, 1986 ; Bacon et al, 2000 ; Mariani et al, 2001 ). Pekin ducks have demonstrated varying susceptibility to DHAV-3, families with both high and low mortality rates were selected based on previous study ( Wang et al, 2017 ; Cao et al, 2020 ).…”

The Presence of the Virus Causing Visceral Lymphomatosis in the Secretions and Excretions of Chickens

“…Recipients.-The chicks used were of a# inbred line of S. C. White Leghorns selected §t this Laboratory (line 15) for susceptibility to lymphomatosis and which had been propagated in isolation during the past twelve years for the purpose of reducing natural infection with lymphomatosis (Waters and Prickett, 1944). The chicks were banded and inoculated the day after hatching and immediately after inoculation each group was placed in a cubicle where they were maintained for the first 75 days of life.…”