The scientific study of parasites. Although viruses and many types of bacteria and fungi are parasites, their study is conducted under the title of microbiology.
n. the study and science of parasites.
A plant or animal which lives upon or within or upon another living organism at whose expense it obtains some advantage without compensation. By convention, human parasitology covers the study of the protozoa, helminths and arthropods infecting humans.... parasite