Paratyphoid fever risk factors

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Overview

Paratyphoid fever can occur in any age group as it is food and water borne. Humans are the only source of these bacteria; no animal or environmental reservoirs have been identified. Typhoid and paratyphoid fever are most often acquired through consumption of water or food that has been contaminated by feces of an acutely infected or convalescent person or a chronic, asymptomatic carrier. Transmission through sexual contact, especially among men who have sex with men, has rarely been documented.