Strongyloides stercoralis is an intestinal nematode which has a very complex life cycle. It has a free and parasitic life cycle which could cause autoinfection. Its infection mostly asymptomatic, however, it can change to a catastrophic fulminant disease, depends on the host immune system's condition.The cellular and the humoral immune system has an important role in the defends mechanism again…
The Cryptosporidium sp. is Coccidia parasite which infects a variety of vertebrate hosts' intestinal epithelial cells. It is the causative agent of cryptosporidiosis. The immunocompetent individual could control and eliminate the infection. Therefore the diarrhea could be cured itself. On the other hand, patients with the cellular immunity defect frequently suffer from persistent or chronic dia…