Final answer:
Typhoid fever is caused by Salmonella Typhi, a bacterium that spreads through feces and leads to severe symptoms and mortality.
Explanation:
Typhoid fever is caused by Salmonella Typhi, a Gram-negative, rod-shaped gamma proteobacterium. It is a serious illness that spreads through feces, causing symptoms such as intestinal hemorrhage, high fever, delirium, and dehydration. This re-emerging disease results in millions of cases annually, with a significant mortality rate.
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