parasitology parasitology parasitology is the study of parasites, their hosts, and the relationship between them. as a biological discipline, the scope of parasitology is not determined by the organism or environment in question but by their way of life. this means it forms a synthesis of other disciplines, and draws on techniques from fields such as cell biology, bioinformatics, biochemistry, molecular biology, immunology, genetics, evolution and ecology. adult black fly (simulium yahense) with onchocerca volvulus emerging from the insect's antenna. the parasite is responsible for the disease known as river blindness in africa. sample was chemically fixed and critical point dried, then observed using conventional scanning electron microscopy. magnified 100×. fields the study of these diverse organisms means that the subject is often broken up into simpler, more focused units, which use common techniques, even if they are not studying the same organisms or diseases. much research in parasitology falls somewhere between two or more of these definitions. in general, the study of prokaryotes falls under the field of bacteriology rather than parasitology. medical