: a highly contagious virus disease of poultry that is marked especially by proliferation of lymphoid cells and is caused by either of two herpesviruses (species Gallid herpesvirus 2 and Gallid herpesvirus 3 of the genus Mardivirus)
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“Marek's disease.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Marek%27s%20disease. Accessed 21 Dec. 2024.
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Marek's disease
noun
Mar·ek's disease
ˈmar-iks-, ˈmer- 
: a highly contagious virus disease of poultry that is characterized especially by proliferation of lymphoid cells and is caused by either of two herpesviruses (species Gallid herpesvirus 2 and Gallid herpesvirus 3)
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