Which of the following parasites is transmitted through contaminated water?

Cryptosporidium parvum is recognized as a waterborne parasite that is commonly transmitted through contaminated water sources. It is a protozoan that can survive in chlorinated water and is often found in untreated water systems, which makes it particularly concerning for public health. Ingesting water that has been contaminated with this parasite can lead to gastrointestinal illness, characterized by diarrhea, stomach cramps, and nausea.

The significance of understanding the transmission routes of parasites like Cryptosporidium parvum cannot be overstated, especially for those involved in food safety and water management. Activities like ensuring proper water filtration and treatment are essential to prevent such parasitic infections.

While other parasites listed may have their own modes of transmission, they do not primarily spread through contaminated water, which differentiates Cryptosporidium parvum as the relevant answer in this context.