01:146:328 Lecture Notes - Lecture 3: Fetus, Trichomonas Vaginalis, Plasmodium
14 Sep 2018
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Document Summary
Parasite transmission: transmission strategies, fecal-oral transmission, trophic transmission. Parasite takes advantage of predator-prey relationship: prey = ih, predator = dh. Pitt = parasite increased trophic transmission: change in hosts behavior or physical characteristics, increases chances of host being ingested, ex: mymeconema neotropicum, neotode that induces fruit mimicry. Uninfected ant and usually not ingested by bird: life cycle of myrmeconema neotropicum, sexual transmission. That means that the parasite does not need any sort of specialized transmission stage. Ex: trichonomas vaginosis protozoan parasite: females trichomonas vaginitis. Males asymptomatic: vertical transmission (vertical = generations) birth/egg laying. Infection of developing egg of embryo while still in mother"s body or at time of. Ex: toxoplasma gandii protozoan parasite: infects a wide range of hosts, humans crosses the placenta and infects the fetus, new offspring generation is already infected with parasite, affects brain development, hydrocephaly, overall very severe, active transmission. Free living transmission stage that is actively searching for and invades the host.
