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16 Cards in this Set
- Front
- Back
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Microbial intoxication |
The toxin is ingested * Staph aureus * Food poisoning |
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Microbial infection |
The bacterium multiplies in the body * Staph aureus * Skin infection |
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Examples of latent infections |
Herpes simplex, Varicella zoster (chickenpox), Myobacterium tuberculosis (tuberculosis) |
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Koch's postulates |
1. The suspected germ must be present in every case of the disease 2. The germ must be isolated and grown in pure culture. 3. The cultured germ must cause the disease when it is inoculated into a healthy, susceptible experimental host 4. The same germ must be reisolated from the diseased experimental host. |
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Yersinia pestis |
Bacterium that caused the bubonic plague |
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Yersinia pseudotuberculosis |
Yersinia pestis' less deadly ancestor |
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Chain of infection |
Reservoir of infectious agent, portal of exit, transmission, portal of entry, susceptible host |
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Direct transmission |
Within 1 meter * ie sneeze/cough, handshake, sexual contact |
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Indirect transmission |
Greater than 1 meter away * airborne, fomites, food/water, vectors |
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Biological vector |
Part of the pathogen's life cycle occurs in the vector * Ie mosquitos carry malaria |
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Mechanical vector |
Just carriers. Agar plate, houseflies, cockroaches, etc. |
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Epidemiology |
The study of the distribution and causes of disease in populations |
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Epidemiological Triad |
Agent, host, environment |
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Endemic |
Constantly present in the population |
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Incidence |
Number of new cases in a given time (yr) in a given population (per 100,000) |
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adfa |
adfa |
