• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/34

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

34 Cards in this Set

  • Front
  • Back
Removal of all microbial life
Sterilization
Removal of pathgogens
Disinfection
Removal of pathogens from living tissue
Antisepsis
Lower microbial counts on eating utensils
Sanitization
Kills microbes
Biocide/Germicide
Inhibiting, not killing microbes
Bacteriostasis
Name 3 Action of antimicrobial agents
1. Alteraion of Cell walls and membranes
2. Damage to proteins and Nucleic Acids
3. Inhibiting metabolism
Name 3 that are more susceptible
Enveloped viruses, Gram-positive bacteria, Non enveloped viruses
Which 3 are the more resistant
1. Bacterial Endospores
2. Mycobacteria
3. Cysts of protozoa
Name 2 methods of Microbial Control
Physical and Chemical
Name 5 Examples of physical microbial control
1. Heat
2. Refrigeration and freezing
3. Filtration
4. Drying and Salts
5. Radiation
Name 6 Examples of Chemical microbial control
1. Alcohol
2. Chlorine
3. Phenols
4. Iodine
5. QUATS
6. Hydrogen peroxide
Structural proteins and enzymes are damaged (denatured); water lost
Heat
Hot air; baking, direct flame, incineration
Dry Heat
How long does hot air take
2 hours at 170 degrees Celcius
Boiling; used for disinfection of food and water
Moist Heat
10 min at 100 degrees celcius
Moist Heat
sterilization process; kills all organisms and spores; widesly used in medical application
Autoclaving
What is the ideal temperature to kill endospores?
15 psi @ 121 degree C for 20 mins
Makes materials, milk and wine safe; milder process
Pasteurization
What is the time for pasteurization
15 seconds at 72 degrees C
membrane filters for cluids; hepa filters for air
Filtration
Ionizing radiation (x-rays and gamma rays) Highly penetrating and generate free radicals inside cells
Radiation
Removal of water inhibits metabolism
Drying
Pathogens lose water lnhibits metabolism (hypertonic)
Salting
Culture media: Growth of chemoautrotrophs and photoautotrophs
Chemically defined media
Culture Media: Growth of most chemoheterotrophic organisms.
Complex
-50 to -95 degrees C is the temperature for
Deep freezing
temperatures -54 to -72 degrees C is the temp fror
freeze drying, aka Lyophilization
What produce the disease symptoms
Exotoxins
Antibodies produced against exotoxins are called
antitoxins
LPS, the lipid A component of the cell wall of gram negative bacteria
Endotoxins
What cause fever, by inducing the release of interleukin 1 and shock
Endotoxins
what allows bacteria to cross the blood brain barrier
Endotoxins