PBHL 2201 Chapter Notes - Chapter 5: Parasitic Disease, Adaptive Immune System, Generation Time
9 Mar 2016
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Document Summary
Infectious disease or communicable disease is an illness due to a specific infectious agent or its toxic products. Parasitic disease- infection caused by a parasite which is an organism that lives on or in a host organism gets its food from the host. Infectivity- id agents vary in infectivity which refers to the capacity of an agent to enter and multiply in a susceptible host and thus produce infection or disease. Virulence- refers to the severity of the disease produce. Active immunity- immunization or natural infection of disease. Passive immunity-refers to antibodies produced by another person or animal new born. Vaccines contain antigens a substance that stimulates antibody formation. Incubation period- time interval between invasion by id agent and appearance of the first sign or symptom of the disease. Subclinical or inapparent- infection does not show obvious clinical symptoms or signs. Generation time- time interval of id infecting host and maximum communicability of host.
