cueFlash

Glossary of Non-fermenting GNB

Start Studying! Add Cards ↓

Genera in this group (nonferm GNB):
Pseudomonas
Burkholderia
Stenotrophomonas
Acinetobacter
Chryseobacterium
Alcaligenes
Moraxella
Eikenella corrodens
Others
general characteristics of the group
-Rare infection causes
-Aerobic; grow on simple media
-K/K or K/NC TSI --> NON FERMENTORS
-OF Carbs show what the organism is
What types of pathogens are non-fermentors considered to be?

If they cause infection it's usually:
Opportunistic
Nosocomial

If they cause infection it's usually:

Wound, urinary tract, or respiratory tract.
3 parameters for I.D. of nonfermentors
-ABility to grow on MAC
-Oxidation of carbs
-Oxidase reaction
Which organism smells like grape?
Pseudomonas aeruginosa
What's pseudomonas' natural habitat
Water, soil, intestines
What patients are susceptible to P. aeruginosa?
-Burn patients
-Cystic fibrosis patients
-Cancer patients
What infections does p. aeruginosa typically cause?
skin/wound
otitis externa
pneumonia
septicemia
5 antibiotics p. aeruginosa is susceptible to:
Piperacillin/Ticaracillin
Gentamicin/Tobramycin/Amikacin
Ciprofloxacin
Imipenem
Cefoperaxone/Ceftazidime
List the 7 Diagnostic Characteristics of P aeruginosa:
1. Oxidase +
2. Glucose Oxidizer
3. Grape odor
4. Produces 2 pigments: Pyocyanin & fluorescein
5. Reduces Nitrate to (N2)
6. Grows on Cetrimide agar
7. Has Monotrichous flagellum - so motility is positive.
Which non-fermentor produces H2S in TSI?
Pseudomonas putrefaciens

has a putrid face
How many Pseudomonas species can you name?

How do they act?
P. fluorescens, P. putida, P. stutzeri, P. alcaligenes, P. putrefaciens;

Act as opportunistic pathogens
In whom is Burkholderia cepacia commonly a cause of infection?

What infection typically caused?
in drug addicts and cystic fibrosis patients.

Pneumonia --> second highest cause
What genus to mallei and pseudomallei belong to?
Burkholderia


Hit the burk scholars with a mallet or at least a pseudomallet
what are the three members of burkholderia?
Burkholderia cepacia
B. mallei
B. pseudomallei
What four genus' are natural habitants of soil and water?
Stenotrophomonas
Acinetobacter
Chryseobacterium
Alcaligenes
What is an emerging pathogen in IV catheter infections?
Stenotrophomonas maltophilia
I.D. characteristics of Stenotrophomonas maltophilia?
Oxidase -
It's the 2nd most common Pseudomonas
Why is S. maltophilia not a member of Pseudomonas anymore?
It's Oxidase - (not +)
Has unsimilar DNA
What is the 2nd most common Nonfermenting GNB?
Acinetobacter baumannii
2 species of Acinetobacter
A. lwoffi
A. baumannii
most common member of Chryseobacterium

what does it look like?
what disease does it cause?
Where is it commonly a pathogen?
C. meningosepticum

Chrysanthemum YELLOW

Nosocomial neonatal meningitis
Tap water
How is the nonfermenting Moraxella different from M. catarrhalis?

Where is it normal flora?
The nonfermentors are gnCb; M. catarrhalis is a true cocci.

-NF in mouth & genitourinary tract.
where is Eikenella corrodens normal flora?

If it causes disease, how is it transmitted?

why the name?
Mouth and gastrointestinal tract

human bite wounds

it corrodes agar while growing
Oxidase Reactions
P. aeruginosa
S. maltophilia
Acinetobacter Iwoffi/Baumannii
P. aeruginosa: Pos+
S. maltophilia: Neg-
Acinetobacter: Neg-
OF glucose maltose

P. aeruginosa
S. maltophilia
Acinetobacter lwoffi/baumannii
Glu Mal

P. aeruginosa Pos+ Neg-
S. maltophila Pos+ Pos+
Acinet lwoffi Neg- Neg-
Acn baumannii Pos+ Varies

Add Cards

You must Login or Register to add cards