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24 Cards in this Set
- Front
- Back
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what is the most common species of aeromonas?
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a. hydrophila
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where is aeromonas hydrophila commonly found?
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In water - hence the name. Either fresh or seawater BTW. :)
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how is aeromonas hydrophila transmitted?
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ingestion of water
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diseases caused by a. hydrophila:
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wound infections
diarrhea - green, malodorous, liquid stool. |
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how do you diagnose aeromonas hydrophila?
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Oxidase Pos reaction - it grows well on enteric media, but all enteric bugs are oxidase neg.
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What organism is identical to but less commonly seen than Aeromonas hydrophila?
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Plesiomonas shigelloides.
-lives in water,causes diarrhea, oxi +, grows well on enterics. |
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What is the most commonly seen Pasteurella species? What type of an infection does it cause?
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P. multocida - causes a zoonotic infection.
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Where is Pasteurella multocida's natural habitat?
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In the mouths of dogs and cats
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What type of infection does P. multocida cause?
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Wound infections from animal bites.
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What 4 features are used for distinguishing P. multocida?
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1. GS shows GNBs with bipolar staining - safety pin-like.
2. Penicillin susceptible. 3. Oxidase positive. 4. No growth on MAC agar. |
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What pathogenic bacteria is easily transmitted by aerosol?
What disease does it cause? |
Francisella tularensis - causes Tularemia.
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What is Francisella tularensis' natural habitat?
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Rodents
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Name 3 symptoms of Tularemia:
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1. Skin ulceration
2. Regional lymphadenophy 3. Febrile disease |
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how do you diagnose francisella tularensis?
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-obligate aerobe
-oxidase negative |
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type of media for francisella tularensis growth
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bunny got caught media - BGC
blood glucose cystine |
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which of these bacteria may take 72 hrs to grow?
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francisella tularensis
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what do you do to handle specimens and cultures of francisella tularensis?
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specimens: level 2 safety cabinet and gloves
cultures: class 3 biohazard safety cabinet and gloves |
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what is the normal habitat of brucella?
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intestinal/urinary tracts of animals
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List 4 species of brucella:
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abortus = cow/bison/elk
canis = dog melitensis = goat suis = pig |
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what is brucellosis?
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undulating fever
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Give 3 features of brucellosis:
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1. Undulating fever/febrile disease
2. Septicemia,lymphadenopathy, splenomegaly 3. Localized bone/tissue/organ infection |
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how do francisella tularensis and brucella get into human host?
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penetrate UNBROKEN SKIN! wow
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what is useful for identifying brucella?
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-gnCoccob
-oxidase + -brucella agar -serological tests for host IgG and IgM |
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what is brucellosis treated with?
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doxycycline
rifampin |
