MBI 131 Lecture Notes - Lecture 6: Ebola Virus Disease, World Health Organization, Common Cold
15 Sep 2016
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Mbi 131 lecture notes 6 organizations responsible for surveillance include cdc and the world health organization: identify outbreaks and epidemics, identify the etiological (causative) agent, implement steps to control the disease. Reservoir: favorable environment where the infectious agent can live and grow. Chain of infection for a human pathogen: portal of exit: path by which agent leaves the host (blood, respiratory system, digestive system etc, mode of transmission: how pathogens are passed to the next host. Immediate transfer of disease agent between infected and susceptible individuals: requires close contact: touching, kissing, handshaking, biting, sex. Airborne: microbial aerosols can enter the respiratory tract. Vehicles (nonliving) ex water, food, and inanimate objects (fomites) toys, doorknobs. Vectors (living) ex mosquitoes, ticks, fleas: portal of entry: where the agent enters a susceptible host (blood, respiratory, digestive etc, new host: susceptible to a new infection being established.
