Host-Parasite Relations

Host-parasite Relations in Mouse Typhoid

The development of acquired resistance to Salmonella typhimurium has been studied in mice infected intravenously with small numbers of streptomycin-sensitive or streptomycin-resistant organisms. By the 14th day of a primary infection the mouse develops a mechanism capable of destroying completely a super infecting dose of organisms, but is unable to eliminate organisms of the primary infection....

Parasite host relations: Hexamita salmonis in rainbow trout Oncorhynchus mykiss

The relationship between host size and infection, the site selection in the host and the association between health status and infection were studied in Hexamita salmonis (Moore, 1923) infected rainbow trout from commercial trout farms. During a 1 yr survey it was shown that the flagellates occur primarily In the smallest fry. The site occupied by the parasite is preferentially the pyloric regi...

Monte Carlo Simulation of Age-Dependent Host-Parasite Relations

The death of a biological population is an extreme event [1] which we investigate here for a host-parasitoid system. (Parasites let the host survive, parasitoids eventually kill the host. In the following both are called parasites.) For seasonal hosts (plants or animals) the parasites can survive only if they parasitise the right developmental stage (egg, larva, pupa, imago) of their host. Ther...

Tracer Techniques for the Study of Host-parasite Relations

TRACER TECHNIQUES FOR THE STUDY OF HOST-PARASITE RELATIONS. Autoradiographic techniques have been used to study the interaction of many facultative and obligate parasites, including viruses. After feeding the host plant with labelled substrates, labelled material accumulates in the infected cells and seems to penetrate into structures of the parasite. After labelling the parasite, its influence...

Parasite-host Interactions