MBIO 1220 Lecture Notes - Lecture 19: Lyme Disease, Zoonosis, Botulism
10 Dec 2018
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Document Summary
Endemic - disease occurs at fairly constant levels. Epidermic - disease occurs in unusually high numbers. Can be objects, food, living things etc. People harbor pathogens and transmit them to others. Germs can be transmitted during any stage of disease: incubation period: period of illness, convalescence period, prodromal period, period of decline. Carriers - people can also transmit pathogens without having any signs of disease themselves. Zoonosis - a disease that occurs in animals - but can be transmitted to humans. Lyme disease - field mice (but transferred by ticks) Clostridium tetani is found in soil: tetanus. Fomite - any non-living object that spreads pathogens. Transmission of disease: three principle routes of transmission, contact transmission. Droplet - spread a short distance (<1m) ex. Influenza: vehicle transmission, pathogens transmitted by a medium. Waterborne - due to improperly treated sewage ex. Salmonellosis: vector transmission, animals that carry pathogens from one host to another. West nile virus: birds (reservoir) > mosquitoes > humans.
