NSG 4405 Lecture Notes - Lecture 8: Case Fatality Rate, Infection, Humoral Immunity
Document Summary
Active immunity= acquired through exposure to the agent. Agent/pathogen = infectious organism that causes the disease. Antigenicity = ability of the agent to produce antibodies in the human host. Attack rate = calculated as the number of people who became ill divided by the number of people at risk for the illnessa. Carrier = human who is infected but who has no outward signs of disease. Case fatality rate = determined by taking the number of fatal cases and diving by the total number of cases. Cellular immunity = speci c to each type of cell. Chronic carrier = remains infected with the agent with no sign of disease for a long period of time. Colonization = person is infected with the agent but has no signs of infection. Common source = when pathogen is transmitted from a single source. Continuous source = exposure to disease is ongoing.
