BIOS10115 Lecture Notes - Lecture 7: Rocky Mountain Spotted Fever, Western Equine Encephalitis Virus, Chagas Disease
3 Dec 2016
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Other microbes (continued) microbial growth and metabolism: most are saprophytes digest dead organic matter. When infect a cell kill first then digest: some are facultative parasites, beneficial as decomposers provide nutrients, some produce antibiotics, the study of fungi is mycology. Worms: helminthiasis most widespread parasitic infection, 1/3 world"s population including u. s, many with multiple infestations. Helminths (worms: animals multicellular eukaryotes, can be free living or parasites, parasitize humans. Flatworms and roundworms: animals get infected by some worms by eating microscopic cysts, sometimes an insect can transmit worms. Arthropods: multi-cellular eukaryotes (animals, 80% of animal species are arthropods, all environments, free living or parasitic, 3 groups. Arachnids 8 legs (includes ticks and mites) Crustaceans variable number 8 or more. Arachnids and microbiology: spiders do not transmit diseases, tick and mites ectoparaites (parasites on the outside skin, ticks are often vectors. Mosquitoes as vectors: malaria, elephantiasis, west nile, western equine encephalitis, dengue fever.
