Homeless people are spreading Shigella in and around downtown Portland, Oregon. Cases are now surging and could lead to a public health emergency.

Shigella is a highly contagious bacteria that spreads through fecal matter. It’s usually spread when the bacteria is on someone’s hand and then they touch their mouth, or through sex. The Portland metro saw at least 218 cases of shigellosis in 2023, with 45 cases in December alone. Many of them occurred in Old Town.