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7 Cards in this Set
- Front
- Back
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Virulence |
measure of a microbes ability to invade and create disease in a host |
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Chain of infection |
Causative agent reservoir portal of exit mode of transmission portal of entry susceptible host |
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Endotoxins |
Surface component of gram-negative bacteria, not destroyed by boiling or autoclaving, partially neutralized by antibodies, produced by physiological changes by interacting with host system to set off cascade of responses that can induce fever swelling vascular leaking pain and shock such as the complement system, example cholera toxin increases secretion of fluids in the GI tract |
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Cell-mediated immunity |
Immune response induced mediated or regulated by T lymphocytes and monocytes are phagocytes |
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Basic microbiology: classification schemes |
1 Kingdom 2 division 3 class 4 order 5 family 6 genus 7 species |
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Micro organism classification |
1. prokaryotes - smaller unicellular organisms with no membrane envelope around nuclear DNA, replicate by binary fission, have plasmids and typically have a cell wall semicolon include bacteria cyanobacteria rickettsiae chlamydia and like a mycoplasmas 2. Eukaryotes - larger and more complex, distinct nucleus and organelles, replicate by mitosis and meiosis, do not have a cell wall except fungi includes fungi protozoa and simple algae. 3. Arche bacteria - microorganisms that grow under extreme environmental conditions |
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Size, shape and arrangements of bacterial cells |
Range from 0.2 to 2.0 micrometers in diameter 228 micrometers in length basic shapes are circle caucus rod-shaped bacillus and spiral |
