Communicable diseases

Apr 8th, 2015
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Study guide on communicable disease

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Looking At Communicablediseases theory and controlprinciplesOutlineIntroduction and definitionsTheory of communicable diseasesControl principlesIntroductionCommunicable disease This is a disease due a specific agent with apotential of transmission from a reservoir to asusceptible host either directly or indirectly. A contagious disease is a disease whosemode of spread is thro contact. An infectious disease is a term which wasused to describe an illness with rapid spreadwhose cause was unknown (beforemicrobiology era ) Both contagious and infectious diseases arecommunicable diseases.Principles of communicablediseasesThere has to be an agent (pathogen).There must be a reservoir of infection.There has to be escape of the agent from thereservoir.There has to be transfer of an agent to a newhost.There has to be entry of agent into the new host.There has to be development of the diseasewithin the body.Pathogens ( agents)An organism mainly a micro org that is able to produce aninfection. Pathogens are classified as ;Primary pathogens. Cause disease as a result of their presence or activity within thenormal, healthy host, and their intrinsic virulence (the severity ofthe disease they cause) is, in part, a necessary consequence oftheir need to reproduce and spread.Opportunistic pathogens Organisms which cause an infectious disease in a host withdepressed immunity.N.B prima

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