Lec_5_ExposurePathway

Lec_5_ExposurePathway - ENVH451/541 Exposure pathways...

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Exposure pathways ENVH451/541 Gwy-Am Shin Office: Suite 2335, 4225 Roosevelt Phone: 206-543-9026 Email: [email protected]
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1415 human pathogens (in 2001) 217 viruses and prions 538 bacteria and rickettsiae 307 fungi 66 protozoans 287 helminths
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Terminology Reservoir Vehicle Vector Route of transmission Port of entry/exit
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Reservoir An ecological niche where a pathogen lives and multiplies Human, animals (domestic and wild), insects, and environments (soil, water, air)
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Different reservoirs Human: many respiratory and sexually- transmitted diseases (Measles virus, HIV,…) Animals: many waterborne and foodborne diseases ( Brucella melitenisis , Giardia lamblia, ) Insects: vectorborne disease ( Plasmodium spp . (malaria), Borrelia burgdoferi (Lyme disease)… Environment: Clostridium botulinum (soil), Mycobacterium avium complex (water), Legionella pneumophilia (air)…
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Vehicle An inanimate object/material by which organisms get from one host to another Fomites, biological products (blood), water, food, and air
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Lec_5_ExposurePathway - ENVH451/541 Exposure pathways...

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