Summary of Notifiable Diseases,
United States 1996


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Diphtheria - by year, United States, 1966-1996

After a more than 8-year interval without a documented domestically acquired infection with toxigenic C. diphtheriae, an endemic focus was found in an American Indian community in South Dakota in 1996; molecular data indicate ongoing endemicity since the 1970s (MMWR 1997;46:506-10).