Effect of environment versus breeding on farm flock incidence of visceral lymphomatosis.
D000818:Animals; D001717:Birds; D001947:Breeding; D004194:Disease; D015994:Incidence; D010063:Ovum; D011200:Poultry; D014777:Virus Diseases / Q000706:statistics & numerical data*
FOWLS, DOMESTIC/diseases; VIRUS DISEASES/statistics