More materials to care for a wound for some time, prophylactic antibiotic like the good pathologist on another thread took (notice he chose ciprofloxacin), lots of handwashing, more than one N-95 mask (Dr. Sanjay Gupta was seen wearing a mask even while riding in a boat around the streets), plenty of water treatment tablets (see below). Brushing the teeth would be nice to be able to do. A finger brush (or cut down regular toothbrush) and some baking soda or tooth powder for brushing is light and takes up very little space.

Miss. Shelter Closes as Several Fall Ill

Sep 4, 1:45 AM (ET)

BILOXI, Miss. (AP) - Officials closed a shelter Saturday because more than 20 people there fell ill, and doctors believe the patients may have contracted dysentery from tainted water. Another 20 people in the area also were treated for vomiting and diarrhea.

The shelter at a Biloxi school had been without water and power since Katrina hit Monday. About 400 people had been staying there, and doctors said some may have ignored warnings to stay away from water.

Some running water came back on late Friday, but it was not safe to drink or even to use to brush teeth or wash, said Dr. Jason Dees, a volunteer working at Biloxi Regional Medical Center.

Most of the patients were treated with antibiotics. About 30 ill residents were taken to a hospital in Mobile, Ala., while the rest were bused to a shelter in Thomasville, Ga.

Biloxi police Cpl. Kayla Robert said she had no idea what caused the illnesses.

"Who knows what they swallowed before they got here," she said. "Half of them were swimming in stuff that we don't even know what it was."