Links.
(for further research)

Get the lowdown and dirty about salmonella paratyphi in this Material Safety Data Sheet published by the Canadian government.

Here's a letter about an outbreak of enteric fever in India. S. paratyphi A was thought to be the culprit, transmitted via contaminated water.

Here's the Straight Dope on Typhoid Mary.

Tap into the ongoing discussion of enteric fevers on Wikipedia, which includes a map of typhoid areas around the world and a section on multidrug-resistant typhoid (MDR typhoid).

Most enteric fever cases in the US and Europe began with infection abroad. NetDoctor in the UK describes Typhoid and Paratyphoid Fever, and lists some precautions for travelers.

Read all about the salmonella bug at salmonella.org.

The Centers for Disease Control report that hundreds of people come down with typhoid and paratyphoid fevers in the U.S. every year. Check their site for the most recent statistics.

Four high school students investigated infectious diseases in Base Camp Earth's Third Expedition.