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19 Cards in this Set
- Front
- Back
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Study of incidents, distribution and control of disease in populatipn |
Ediemiology |
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Ability of microorganism to gain entry into host tissue and bring about disease |
Patogenicity |
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Requirements for pathogen to cause disease (7) |
Has to maintain resavoir, has to get to you, portal of entry, adhere to body, invade immune system, divide, has to get out |
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3 resevoirs |
Human, animals, enviroment |
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2 types human resivoir |
Symptamtic, asymptomatic |
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What is symptomatic |
When a person shows signs of disease |
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What is asymptomatic |
Carriers, do not show signs of disease |
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What is an incubatory carrier |
Someone who's infected and will eventually get sick |
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What is a chronic carrier |
Someone who recovered from disease but continues to shed disease causing agent. |
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8 mode of transmission |
Respitory droplet (most common) Droplet nuclie Phomite (inanimate object) Direct body contact Fecal Oral Arthropod vectors (insects) Parental (needle stick) Food water (has ability to infect.the.most |
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Most important requirement for infection? |
Portal of entry |
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Steps in invading immune systerm |
Hide in host cell Avoid killing by compliment protein Avoid destruction by phagtosis Surviving within phagocyte Avoids antibodies |
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What stage does human start getting sick |
When microorganism starts to divide and multiply |
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Gram + and Gram - organism, produced through bacterial metabolism. Very destructive and very SPECIFIC |
Extotoxin |
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Gram - organism. Lippolysaccride, not as specific or destructive |
Endotoxin |
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First line of defense in immune sytsem |
Physical barrier, antimicrobial substances, normal flora |
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2 types of physical barrier |
Skin, mucas membrane |
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4 antimicrobial subatances |
Lysozyme Peroxidase Lactoferrin Defensins |
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What is a microorganism growing on body surfaces of healthy individual |
Normal flora |
