Is Cryptosporidium a problem in pool water?

Could you elaborate on the potential risks posed by Cryptosporidium in swimming pool water? Is it a widespread concern, or does it depend on specific conditions? What are the symptoms of Cryptosporidium infection, and how can swimmers protect themselves? Are there any effective measures pool operators can take to prevent Cryptosporidium contamination? Understanding the severity of this issue is crucial for both swimmers and pool operators to ensure the safety of their aquatic environments.