Anaerobic Concepts

Question 1

What are the different ways anaerobes can be defined?

Answer 1

Capnophilic (5-10% CO2)
Microaerophilic (5% or less O)
Obligate (Killed in O presence)

Question 2

Strict aerobes and facultative anaerobes can protect themselves from O. What enzymes do they possess to be able to break down oxygen?

Answer 2

Superoxide Dismutase
Catalase

Question 3

What polymicrobial infections are often involved in brain abscesses?

Answer 3

Bacteroides spp.
Prevotella spp.
Porphyromonas spp.
Fusobacterium spp.
Clostridium spp.

Question 4

Propionibacterium and peptostreptococci are considered normal flora where?

Answer 4

The skin
Includes Streptococcus

Question 5

Where are Clostridum, Peptostrep, Bacteroides, Bilophila, and Fusobacterium located?

Answer 5

Gastrointestinal (GI) Tract

Question 6

What organism is described as boxcar, large square rods and produces a double zone of hemolysis?

Answer 6

Clostridium Perfringes
Gram positive bacillus
Sub terminal spores