Non-Fermenting Gram-Negative Bacilli

Question 1

Characteristics of NF GN Bacilli

Answer 1

• (+) MAC (colorless colonies)
• Fail to acidify OF media
• K/NC in TSI
• Most are oxidase (+)
• Most w/ characteristic pigment, odor
• Most are MDR

Question 2

Top causes of nosocomial infections

Answer 2

1. P. aeruginosa
2. A. baumanii
3. S. maltophilia

Question 3

Burkholderia:
* NF except ?
* Non-motile?

Answer 3

• NF except cepacia (can be LF on MAC)
• Non-motile: B. mallei

Question 4

Differentiate S. maltophila vs. Acinetobacter

Answer 4

(+) motility and (+) LDC, compared to Acinetobacter

Question 5

Differentiate Acinetobacter vs. Bordetella bronchiseptica

Answer 5

Similarities:
- Oxidizers
- CPOP
- Ubiquitous environments

Difference: Urease
- A: (-)
- B.B. and BPP: (+)
Note: BB is oxidase (+) while BP an BPP are oxidase (-)