HTHSCI 2HH3 Lecture Notes - Lecture 1: Intracellular Parasite, Pseudopodia, Plasmodium
23 Apr 2016
School
Department
Course
Professor
Document Summary
Symbiosis: relationship in which you would rarely see one without the other. Integral relationship usually based on nutrients that defines the relationship. It does not necessarily mean it is positive. Commensalism: the commensal benefits; host is not harmed, nor benefits. Affect on the host is neutral. (ex: bacteria in our ears, and on skin) We are better for having these microbes present. (ex: e. coli makes vitamin k in gut, providing appropriate clotting response) Parasitism: parasitic microbe is dependent on host and benefits; host is harmed, disease may result. (ex: all infectious diseases are referred to as parasitism symbiotic relationships) always the relationship in microbes that cause infectious disease. Parasites are a very specific type of microbe. Any microbe regardless of type, that causes an infection in the host is referred to as having a parasitism relationship. Parasitism is always a disease state: infections imply disease. Commensalism and mutualism are not infection, they are examples of.
