MICR2209 Lecture 1: L1 Host Parasite
7 Feb 2019
School
Department
Course
Professor
Document Summary
Details of 6 links of the infection chain. Details of the key microbial virulence factors. Definitions (exam) infectious disease, parasitism, parasite, host, infection, pathogen, pathogenicity, virulence latent state. Infectious disease: any change from a state of health, in which part or all of the host"s body cannot carry on its normal functions because of the presence of an infectious agents/ products of infectious agents. P11 4 critical phases that characterize infectious disease. P12 infection chain a combination of processes/ events: pathogen source/ reservoir, transmission, infectious dose, exposure, growth, host susceptibility, exiting the host. Reservoir: natural location where pathogen is normally found. Healthy person carriers tb bacillus: pathogen transmission, airborne, contact, vehicle, vector borne, airborne via water droplets: via dust: cause infections with rt cause fungal, nosocomial infections, contact. External: passive carriage of pathogen on body of vector. External: passive pathogen carriage on body of vector. # organisms to infect 50% host: infectious dose.
