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11 Cards in this Set
- Front
- Back
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what are animal Reservoirs |
animals harbor diseases and may be spread to humans via direct contact with the animal or its waste products or via an arthropod. |
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what are asymptomatic carriers |
humans with active diseases that show no obvious symptoms and are a continued source of infection. |
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names some nonliving reservoirs |
contaminated soil, water, and food. |
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what is contamination |
refers to the mere presence of microbes in or on the body. |
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what is an infection? |
microobiota that have overcome the body's external defenses, multiply and become established in the body (a successful invasion of the body by a pathogen ) |
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what are portals of entry? |
sites through which most pathogens enter the body. skin, mucous membranes, and the placenta. |
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what is the parenteral route? |
by which microbes are directly deposited into deeper tissues. i.e. nail, thorn, or hypodermic needle. |
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what is adhesion |
the process by which microorganisms attach themselves to cells. |
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what are adhesion factors? |
variety of specialized structures or attachment proteins |
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what are ligands? |
they are surface lipoprotein and glycoprotein molecules on the surface of viruses and bacteria |
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where are adhesions found on bacteria? |
on fimbriae, flagella, and glycocalyces |
