BIOSC 0370 Lecture Notes - Lecture 15: Pathogenic Bacteria, Lyme Disease, Malaria
24 Apr 2018
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Document Summary
Like viruses, parasites prefer certain tissues and/or systems: parasites. Live in, on, or near their host: they have a negative impact on the host, or they may be tolerable, consumes resources from host, ectoparasites like ticks and fleas live outside their host, ticks, mites, louses, fleas, nematodes. Major trade-off: portability vs. safety and/or convenience, high exposure to natural enemies, high exposure to external environment. Low difficulty of moving to and from host, for parasite or its offspring. Low ease of feeding on host: endoparasites infect a host from within and can be intracellular or intercellular. Live within the cells of an organism: really small, viruses, prions, and some bacteria. Live in between the cells of the organism, reside in open cavities: much larger, protozoans, some bacteria, fungi, helminths (flatworms, major trade-off: In order for a virus to replicate, it needs a host: bird flu is a zoonotic disease that jumped from fowl to humans, h1n1 (aka spanish flu of 1918)
