ANTC67H3 Lecture Notes - Lecture 7: Antibody, Influenza A Virus Subtype H5N1, Tuberculosis
Document Summary
Chain of infection between host, agent, environment with vectors/vehicle affecting each: host: human or animal that microorganism infection/ place for agent to grow and multiply. Points of entry depends on the agent: skin, mucous, respiratory tract, gastrointestinal tract. Reaction of host to infection depends on interaction between host, agent and mode of transmission as well as host resistant in infection: agent: microorganism that causes the infection. Pathogenicity: ability to produce disease ( ratio of # people with clinical disease to # people exposed) Infective dose: amount required to cause infection in susceptible individual. Source of infection: person object from which host acquire the agent. Vector: anopheles mosquito: direct: person to person by direct contact (sexual, physical, and lesions) Disease cannot survive for long when away. Prevent contact: indirect: disease is transmitted by common vehicle (contaminated object) or vectors ( mosquitos) or is airborne. Disease can survive for a period of time away from host.
