title: Survival of Marek's disease agent in litter and droppings.
mesh_terms: D000818:Animals; D001353:Avian Leukosis / Q000276:immunology*; D001354:Avian Leukosis Virus / Q000302:isolation & purification*; D002645:Chickens; D005260:Female; D008297:Male; D011201:Poultry Diseases / Q000276:immunology*