Resistance and Susceptibility to the Avian Leukosis Complex in Chickens

A Possible Relationship between Mercury Retention and Resistance to Lymphoid Leukosis ,

“…Burmester et al (1959), and Crittenden (1968), found that crossing resistant and susceptible strains resulted in increased mortality from lymphoid leukosis in the progeny of the crosses than in the chicks of the resistant parent line. Likewise, crossing resistant and susceptible strain WWREC chicks produced progeny that resembled the susceptible strain in retention of mercury in the kidneys (Miller et al, 1959b), and were also more susceptible to the leukosis complex (Bearse et al, 1963).…”

Relaxed Selection in White Leghorn Lines Selected for Resistance and Susceptibility to Avian Leukosis

“…In the 20th generation of a selection experiment (Bearse et al, 1963), a relaxed selection line was established from each of the lines selected for resistance (R) and susceptibility (S) to avian leukosis. The relaxed lines were chosen at random from all available males and females in each line.…”

The Effects of Dosage and Administration of Two Mercurials on Mercury Retention in Two Strains of Chickens ,

“…T WO strains of chickens, designated as R and S, have been selected from common ancestry at the Western Washington Research and Extension Center and have been described by Bearse et al (1963). Large differences in the retention of mercury in the liver and kidneys between the R and S strains of chickens 96 hours after intramuscular injection of organic or inorganic mercury compounds at the rate of 3.0 mg. mercury per kg.…”