BIOL 2Q04 Lecture Notes - Lecture 15: Measles Virus, Compartmental Models In Epidemiology, Phocine Distemper Virus
2 Dec 2015
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Document Summary
An interaction in which a disease organism lives on or within a host plant or animal, to the benefit of the disease agent and the detriment of the host. Parasites are organisms that grow, feed, or are sheltered in a host, with a negative impact on the host"s health. Also includes prions, which are proteins, not organisms. Live in host but produce eggs or larvae that pass to the external. Parasitism and infectious disease have much in common and will be treated together. Disease can cause both mortality and sublethal effects. Fewer offspring, captured more easily by predators, less tolerant of changes in environment. Disease and parasitism thus interact with competition and predation in affecting population dynamics. Compartment models are box and arrow models that include simplified population dynamics. Birth, death, and infection processes are continuous in time. Consider a microparasite that is directly transmitted between hosts (e. g. measles virus)
