PBIO 4000 Lecture Notes - Lecture 1: Symbiosis, Mollicutes, Parasitism
12 Apr 2016
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Document Summary
Disease cycle: arrival (germination) penetration (recognition) infection (nutrition) invasion (symptoms) reproduction release dissemination. Parasite: an organism that lives on or in another organism (host) and obtains its food from that organism. Pathogen: an organism that causes damage (disease) to another organism. Fungi: plasmodium, mycelium (strands) = considerably larger than bacteria, reproduce via spores, colony (multiple mycelium together) Mollicutes: bacteria that lost their cell wall; simplified genomes; specialized in which cell tissue they can colonize within. Viruses: very small; the size of single plant cell. Pathogenicity: ability to cause disease pathogenic (disease causing) or not. Virulence: relative degree of pathogenicity a scale low or high. Biotrophy: pathogen obtains nutrients from living host tissue, con men . Necrotrophy: pathogen obtains nutrients from dead host tissues which it killed itself, thugs . Kills a few cells in advance and feeds off of that, then continues along.
