What does Cryptosporidium cause in humans?

Cryptosporidium is a protozoan parasite that primarily affects the gastrointestinal system in humans. When ingested, it can lead to a condition known as cryptosporidiosis, which is characterized by symptoms such as diarrhea, stomach cramps, nausea, and vomiting. These gastrointestinal issues stem from the parasite's life cycle within the intestines, causing inflammation and impairing nutrient absorption.

In addition, Cryptosporidium is particularly known for its resistance to chlorination, which poses a significant concern for water quality and public health, especially in drinking water and recreational water settings. The organism can be transmitted through contaminated water supplies or by contact with infected individuals or animals, making awareness and preventive measures crucial for water treatment operators. This focus on gastrointestinal illness reflects the organism's primary impact on human health, distinguishing it from other conditions such as skin infections, respiratory problems, or neurological disorders.