Parasitism is a type of symbiotic relationship in which one organism benefits at the expense of another organism, known as the host. Parasites rely on the host for nutrients and resources, often causing harm or disease in the process. This research area focuses on studying the interactions between parasites and their hosts, including the mechanisms of parasitic infection, transmission, and immune responses. Researchers in this field also investigate strategies for controlling and treating parasitic infections in both animals and humans. Parasitism is a diverse and complex phenomenon that occurs in a wide range of organisms, from microscopic pathogens to large organisms like helminths.