The two public water parks closed on Friday after several children got sick with cryptosporidium symptoms in Dallas were reopened the following day after being treated with extra chlorine.

The two water parks involved in the scare were the Campbell Green Park and Mildred Dunn Park.

Cryptosporidium is a water parasite found in feces. One can become infected if he/she swallows infected water causing symptoms such as diarrhea and nausea for up to two weeks. Cryptosporidium is not common in this area.

Both water parks were reopened on Saturday after their managers treated the water with extra chlorine. It is known that cryptosporidium is resistant to normal levels of chlorine.

None of the five other water parks specially designed for children in Dallas have shown signs of the bacteria, so they remained opened.

“I think everything is fine. We’re saying all municipalities should bring in an expert to look at the process of cleaning the systems out. We want to make sure they’re safe and sanitary for the kids,” Zachary Thompson, director of Dallas County Health and Human Services assured.

In order to prevent further infections with cryptosporidium people are urged to follow some elementary rules which include: 1. Don’t swim when having diarrhea; 2. Avoid swallowing water when swimming; 3. Practice good hygiene prior to swimming; 4. Change diapers on children at the bathroom and not at the poolside and wash them thoroughly with soap and water before swimming (specially in the diaper region).