Anaerobes Flashcards
Organisms that does not require oxygen for growth
Anaerobes
What are the four (4) macroscopic exam done to identify anaerobes?
- Presence of foul odor
- Presence of blackening/black color of specimen
- Fluorescence
- Presence of sulfur granules
Three (3) anaerobes that emit foul odor
- Clostridium difficile
- Fusobacterium
- Porphyromonas
Equipment used to provide an anaerobic environment
GASPAK Jar
Indicators of GASPAK Jar
Methylene Blue or Resazurin
Component of GASPAK jar that ensures oxygen free environment
Palladium Catalyst
What happens when there’s a presence of oxygen in GASPAK jar?
The jar turns red or blue depending on the indicator that is present.
Methyl Blue (Blue)
Resazurin (Pink)
Absence of color in the GASPAK jar indicates what?
Absence of air
Common failure of GASPAK jar
Inactivation of catalyst due to repeated use
Gram negative anaerobic bacilli that produce black pigment and brick red fluorescence under UV
Porphyromonas and Prevotella
Anaerobes that produces red fluorescence that rapidly fades
Veilonella
The color of fluorescence Fusobacterium nucleatum emits
Chartreuse fluorescence (Yellow)
Three (3) anaerobes with sulfur granules
- Actinomyces,
- Propionibacterium/Cutibacterium acnes
- Eubacterium nodatum
Anaerobic organism that is microscopically with tapered ends appearing like toothpick
Fusobacterium nucleatum
Anaerobic organism with “bifid” ends/appearing like bone-shaped dog biscuit
Bifidobacterium
Anaerobic bacilli that assumes safety pin appearance
Bacteroides fragilis
Bacteroides fragilis shows resistance to which antibiotics in Potency Disk Test?
- Kanamycin
- Vancomycin
- Colistin
Bacteroides fragilis is bile tolerant.
a. True
b. False
a. True