HLTB16H3 Lecture Notes - Lecture 8: Arthropod, Herd Immunity, Organism
16 Aug 2018
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Objectives: understand basics of infectious disease, identify chain of infection components and their public health approaches, describe steps of outbreak investigation, critically asses new infectious disease issues facing public health. Classification of infectious disease: micro-parasites, bacteria (tb, typhoid, fatty membrane contains dna and cellular machinery, obtains energy from sugar, protein, fat, live and multiply outside of host, bacilli: rod shaped. Anything ending in cocci: spirochete: corkscrew shaped. Organism must be present in every case of disease: 2. Organism must be isolated and grown in pure culture: 3. Organisms must cause certain disease when inoculated into susceptible individual: 4. Organism must be removed from individual and identified. 6 modes of transmission: contact, direct- surface to surface. 6 link chain of infection and public health approaches. 1. pathogen: virus, bacterium, or parasite that causes disease, public health approach kill agent (ex; antibiotics) 2. reservoir: location which pathogen lives and reproduces, public health approach eliminate reservoir (ex; remove trash)
