Cryptosporidium outbreak associated with Bothell pool

Cryptosporidiosis is a disease that causes watery diarrhea. It is caused by a microscopic germ (parasite) called Cryptosporidium.

Cases and health response

This parasite can live in water, food, soil, or on surfaces that have been contaminated with infected poop.

Image courtesy of Center of Disease Control and Prevention (CDC). An August outbreak of cryptosporidiosis (crypto) has been linked to a popular indoor pool in Bothell.

Public Health Seattle-King County announced Sept.

The exposure dates were Aug. 29 to Aug. 30, 2026.

Crypto is a “diarrhea-causing disease that is spread through germs that live in the poop of infected people or animals.

When a person swallows cryptosporidium, or “crypto” germs, they can become infected,” according to the Center of Disease Control and Prevention (CDC).

Health investigation

30 that they had investigated the outbreak associated with the pool at McMenamins Anderson School, suspecting that the illness has spread to 14 cases after someone infected with crypto had spent time in the pool and spreading germs that went on to infect other people.