The Genesee County Health Department released a statement(.pdf) noting the increase in shigella, the bacteria that causes the illness, and said that it is spread through a fecal-oral route. This means that the bacteria leaves one person’s body through the stool, and is spread to others through contaminated hands, surfaces, food, or water.Residents of Flint have been relying on bottled water for drinking, but personal hygiene habits have changed in light of the water contamination crisis. Many residents rely on baby wipes, which they are able to get for free at bottled water distribution centers, as a substitute for washing their hands

Source: Flint Residents Hit With Bacterial Illness as Water Crisis Continues