EEB 3408W Chapter Notes - Chapter 11: Net Reproduction Rate
14 Mar 2017
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Document Summary
Parasites can cause infectious diseases and can serve out management objectives - biological means for controlling agricultural pests. Host parasite interaction differ from predator prey interactions because diseases do not necessarily kill the host. Recovered hosts often develop a long term immunity to reinfection. Micro parasites reproduce quickly, reach high populations in host. Duration of infections is often limited by host defenses and short relative to host life span. Dynamics are driven by transmission between hosts. Macroparasites typically cause chronic and persistent infections. Severity depends on number of parasites present. Small fraction of the host population may harbor most of the parasites. Microparasite simulation model has susceptible, infected and immune/ recovered individuals. Susceptible individuals arise through birth or loss of immunity. Leave the infected category through natural mortality, disease induced mortality or. Individuals leave susceptible class through natural mortality or by acquiring the parasite recovery. Newly infected hosts can transmit the disease immediately. There is no age structure among hosts.
