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USMLE Step 1 Mnemonics Mnemonics, acronyms, reminders, and memorizing tips for the USMLE Step 1.


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Old 07-13-2013
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Bacteria Catalase-positive organisms mnemonic

CAtALASE

CCandida
A – S. Aureus
t
A – P. Aeruginosa
L - Listeria
A - Aspergillus
S - Serratia
EE. Coli
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Old 07-13-2013
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What about P. cepacia!
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Old 07-13-2013
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and Nocardia
and Cryptococcus!
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And what about- Corynebacterium diphtheriae, Citrobacter, Enterobacter, Klebsiella, Shigella, Yersinia, Proteus, Salmonella and Mycobacterium tuberculosis.
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Old 07-13-2013
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Here is a good one

Quote:
Originally Posted by Betro Sadek View Post
The classical USMLE question describing a case of Chronic Granulomatous Disease and then asking you what other infection is the patient liable to get.

Of course you should be thinking of all of the catalase positive microorganisms.

Here's a mnemonic

SPACE
  • Staphylococci (important not confuse it with streptococci)
  • Pseudomonas aeroginosa
  • Aspergillus fumigatus
  • Candida
  • Enterobacteriaceae (specially Klebsiella and Serratia both of which can cause pneumonia and UTI)
Worth to remember that none of the anaerobes are Catalase positive

Also some others are Catalase positive
  • Nisseria (Gonorrhea & Meningitidis)
  • Vibrio
  • Nocardia
  • Campylobacter & Helicobacter
  • Gardnerella vaginalis
  • Pseudomonas cepacia
  • Mycobacterium Tebeculosis also produce a heat sensitive catalase ( active only in body temperature ) so it become catalase negative at 68.0 "F
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Old 07-14-2013
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Default Clarification

You are absolutely right, I didn't explain that the mnemonic reffers to the examples of catalase-positive organisms infecting patients with CGD given by the FA 2013, in which they even put a mnemonic (You need PLACESS for your cats) but I came up with a new one using the word catalase in order to make it more straightforward.
Apologies and thanks!
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Old 07-14-2013
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Quote:
Originally Posted by Asclepio View Post
You are absolutely right, I didn't explain that the mnemonic reffers to the examples of catalase-positive organisms infecting patients with CGD given by the FA 2013, in which they even put a mnemonic (You need PLACESS for your cats) but I came up with a new one using the word catalase in order to make it more straightforward.
Apologies and thanks!
No need for apologies. Ur thread has actually brought out all the hidden organism.
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Old 06-03-2016
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Thank you so much!
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Old 07-13-2016
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thanks these help alot
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