Current Research in Social Psychology (CRISP) is a peer reviewed, electronic journal publishing theoretically driven, empirical research in major areas of social psychology.
Giardiasis, an infection of the small intestine is caused by protists known as Giardia Lamblia. The disease is more common in developing countries as compared to the developed countries. It causes symptoms like cramps, diarrhea, fatigue, weight loss and other similar symptoms.
The diseases that protists inflict on humans are caused by those that are parasitic--they feed on another organism, causing harm without benefiting their host. Often, parasites use another organism as a vehicle to gain access to the host. The go-betweens linking parasites and hosts are called vectors.