Marek's disease: transmission of infection by filtrate of feather follicles.
D000818:Animals; D001353:Avian Leukosis; D002645:Chickens; D004848:Epithelium / Q000382:microbiology; D006564:Herpesviridae / Q000302:isolation & purification; D006566:Herpesviridae Infections; D010523:Peripheral Nervous System Diseases; D011201:Poultry Diseases; D012867:Skin / Q000382:microbiology