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Definition of Typhoid Mary

Typhoid Mary: A chronic carrier of the agent of typhoid fever, or the chronic carrier of the agent of any other disease. Named for Mary Mallon, an Irish cook who was found to be a healthy typhoid carrier in the US early in the 20th century.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=11285
Last Editorial Review: 3/19/2012

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