01:146:328 Lecture Notes - Lecture 3: Vertically Transmitted Infection, Nematode, Toxoplasma Gondii
21 Feb 2018
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1: host an environment, advantages, problems, transmission. What are some of the advantages to living inside a host: fecal-oral, trophic, sexual, vertical, active, vector, constant conditions, temperature and ph pretty much all the same. What is a major disadvantage of having a host as the environment: host will die so it is necessary that the parasite has a mechanism to get out of 1 host organism and into another. What is transmission: movement from host to host to ensure survival of subsequent generations. Describe fecal-oral transmission: parasite is released in the host feces and this contaminates food and water. How do humans usually become infected with parasites that use this strategy: drink food and water that is contaminated. Why is this type of transmission described as passive: relies on chance encounters. What major obstacle must be faced by parasites that use a sit and wait" strategy: they need to be able to resist environmental conditions during the transmission stage.
