| Marek disease | <disease> Infectious cancer of the lymphoid system (lymphomatosis) in chickens, caused by a contagious Herpes virus. An effective vaccine is now available. (18 Nov 1997) |
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| marek's disease | A lymphoproliferative disease of fowl caused by a herpes virus. Lymphoid cell infiltrations are most common in the peripheral nerves and gonads, but widespread infiltrations may also be found in any of the visceral organs, skin, muscle, and the iris of the eye. The location of the lesions dictates the clinical signs, such as paralysis, general depression, and blindness. (12 Dec 1998) |
| Marek's disease virus | The herpesvirus that causes avian lymphomatosis (Marek's disease); is distinct from those causing other forms of leukosis. Synonym: avian lymphomatosis virus, fowl neurolymphomatosis virus, Marek's disease virus. (05 Mar 2000) |
| Marek, Josef | <person> Hungarian veterinarian and pathologist, 1867-1952. See: Marek's disease, Marek's disease virus. (05 Mar 2000) |