The gastrointestinal ailment known as cryptosporidiosis is brought on by the parasite protozoan species Cryptosporidium. These microscopic organisms mostly affect humans and a variety of other animals through the intestinal tract, causing symptoms like vomiting, diarrhea, and cramping in the stomach. Individuals with compromised immune systems, such as small children, the elderly, and those living with HIV/AIDS, may experience very severe cases of the disease.Asexual and sexual reproduction occur during the course of the intricate life cycle of Cryptosporidium spp. in a single host. The thick-walled spores known as oocysts, which are expelled in the feces of infected people or animals, are what cause an infection in a host. These oocysts can endure for extended periods of time without a host due to their remarkable resistance to environmental stressors. After being consumed, the oocysts release sporozoites into the intestines, where they infiltrate the gastrointestinal tract's epithelial cells. The cycle is continued by the sporozoites' asexual proliferation into merozoites inside these cells, which can either sexually mature into new oocysts or infect other cells.The environmental durability and robustness of Cryptosporidium are noteworthy. The oocysts are hard to remove from water sources because they are resistant to a variety of conventional disinfectants, including chlorine. Numerous outbreaks linked to tainted drinking water, recreational water, and food have resulted from this resistance. Globally, cryptosporidiosis is a serious public health issue, especially in places with subpar water treatment infrastructure.When diagnosing cryptosporidiosis, stool samples may be stained to make the oocysts more visible under a microscope. A growing number of molecular methods, including polymerase chain reaction (PCR), are being utilized to differentiate and identify Cryptosporidium species with greater accuracy.There aren't many choices for treating cryptosporidiosis. The illness usually goes away on its own in a few weeks in otherwise healthy people. However, treating the illness might be difficult for those with impaired immune systems. Although its effectiveness varies, nitazoxanide is one of the few medications authorized for the treatment of cryptosporidiosis.Enhancing water treatment, maintaining proper hygiene, and avoiding consuming possibly contaminated food or water are the main goals of preventive measures. In an effort to lessen the effects of this persistent protozoan parasite, public health initiatives continue to concentrate on tracking and managing outbreaks.