HLSC 1F90 Lecture Notes - Lecture 13: Cytotoxic T Cell, Natural Killer Cell, Adaptive Immune System
8 Feb 2017
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Topic 13: infectious diseases, professor ana sanchez ana. sanchez@brocku. ca. Host: an organism that is larger than the agent that provides shelter and nutrients, facility of maturation, reproduction and spread. Infection: presence of an infectious agent in the body (internally) Infestation: presence of an infectious agent on the body (externally) Disease: a pathological condition, part of the organ, or system of an organism resulting from various causes, such as infection, genetic detect, or environmental stress, and characterized by an identifiable group of signs or symptoms. Vector: an arthropod- usually an insect- capable of transmitting pathogens that cause infectious disease. Look at the figure in the textbook (the one with 4 phases) Phase 1: viruses invade the body the rough a break in the skin or another portal of entry. They take over body cells in order to replicate. Dendritic cells recognize the invaders by the antigens on their surface. They consume the viruses and display their antigen.
