HLTB21H3 Chapter Notes - Chapter 1: Rodent, Chinese Canadians, Toxic Shock Syndrome
Document Summary
Parasites organism that grows, feeds, and is sheltered on/in a different organism and that does not contribute to the survival of its host. Virus ultimate micro-parasite-smaller than bacteria; neither cells not organisms; can only reproduce within their host. Macro-parasites composed of many cells; cycles through transmission stages (eggs and larvae) which pass into the external environment ex: plasmodium. Transmission movement of a parasite from host to host. Interval of time required for development of a disease. See a period of activity (doing something inside the host) Seemingly inactive period between exposure to an infection and subsequent illness. Animal infections that can be transmitted to humans. Epidermal triad8: host: immunity, genetics, nutrition ex: person, environment: promote exposure ex: contaminated water, air, food, etc, agent: biological, physical, chemical, psychosocial (ex: stress), rate of growth, persistence ex: bacterium. Indirect: through a common route/vector (ex: needle) ex: contaminated water/air, mosquito. Ingestion through the mouth ex: e. coli in water.
