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26 Cards in this Set
- Front
- Back
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Genera in this group (nonferm GNB):
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Pseudomonas
Burkholderia Stenotrophomonas Acinetobacter Chryseobacterium Alcaligenes Moraxella Eikenella corrodens Others |
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general characteristics of the group
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-Rare infection causes
-Aerobic; grow on simple media -K/K or K/NC TSI --> NON FERMENTORS -OF Carbs show what the organism is |
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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. |
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3 parameters for I.D. of nonfermentors
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-ABility to grow on MAC
-Oxidation of carbs -Oxidase reaction |
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Which organism smells like grape?
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Pseudomonas aeruginosa
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What's pseudomonas' natural habitat
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Water, soil, intestines
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What patients are susceptible to P. aeruginosa?
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-Burn patients
-Cystic fibrosis patients -Cancer patients |
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What infections does p. aeruginosa typically cause?
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skin/wound
otitis externa pneumonia septicemia |
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5 antibiotics p. aeruginosa is susceptible to:
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Piperacillin/Ticaracillin
Gentamicin/Tobramycin/Amikacin Ciprofloxacin Imipenem Cefoperaxone/Ceftazidime |
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List the 7 Diagnostic Characteristics of P aeruginosa:
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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. |
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Which non-fermentor produces H2S in TSI?
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Pseudomonas putrefaciens
has a putrid face |
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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 |
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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 |
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What genus to mallei and pseudomallei belong to?
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Burkholderia
Hit the burk scholars with a mallet or at least a pseudomallet |
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what are the three members of burkholderia?
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Burkholderia cepacia
B. mallei B. pseudomallei |
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What four genus' are natural habitants of soil and water?
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Stenotrophomonas
Acinetobacter Chryseobacterium Alcaligenes |
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What is an emerging pathogen in IV catheter infections?
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Stenotrophomonas maltophilia
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I.D. characteristics of Stenotrophomonas maltophilia?
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Oxidase -
It's the 2nd most common Pseudomonas |
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Why is S. maltophilia not a member of Pseudomonas anymore?
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It's Oxidase - (not +)
Has unsimilar DNA |
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What is the 2nd most common Nonfermenting GNB?
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Acinetobacter baumannii
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2 species of Acinetobacter
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A. lwoffi
A. baumannii |
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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 |
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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. |
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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 |
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Oxidase Reactions
P. aeruginosa S. maltophilia Acinetobacter Iwoffi/Baumannii |
P. aeruginosa: Pos+
S. maltophilia: Neg- Acinetobacter: Neg- |
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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 |
