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USMLE Mnemonics
| Question | Answer |
|---|---|
| Gram Stain Limitations: These Rascals May Microscopically Lack Color | Treponema, Rickettsia, Mycobacteria Mycoplasma, Legionella Pneumophila, Chlamydia |
| Obligate Aerobes: Nagging Pests Must Breathe | Nocardia, Pseudomonas Aerigunosa, Mycobacterium tuberculosis, Bacillus |
| Obligate Anaerobes: Can't Breathe Air | Clostridium, Bacillus, Actinomyces |
| Obligate Intracellular: Really Cowardly | Rickettsia, Chlamydia |
| Facultative Intracellular: Some Nasty Bugs May Live Intracellularly | Salmonella, Neisseria, Brucella, Mycobacterium, Listeria, Francisella, Legionella |
| Encapsulated Bacteria: Some Killers Have Pretty Nice Shiny Bodies | Strep pneumoniae, Klebsiella, Hemophilus influenza type B, Pseudomonas aerigunosa, Neiseria meningitidis, Salmonella, group B strep |
| Urease-positive: Particular Kinds Have Urease | Proteus, Klebsiella, H. Pylori Ureaplasma |
| cAMP Inducers: c, A, M, P | Cholera, Anthrax, Monteczuma's Revenge (ETEC), Pertusis |
| Gram Positive: She Says Black Clocks Look Corny, Not Attractive! | Staph and Strep (cocci), Bacillus and Clostridium (rods - spores), Listeria and Cornyebacterium (rods - no spores), Nocardia and Actinomyces (branching filamentous) |
| Staphylococci: On the way to the STAPH retreat, there was NO StRES | Novobiocin: saphrophitiucs is resistant, epidermidis is sensitive |
| Streptococci: OVRPSS | Optochin: viridans is resistant, pneumoniae is sensitive/soluble (in bile) |
| Streptococci: B Group BRAS | Bacitracin: group B are resistant, group A are sensitive |
| Gram Positive Cocci: | Staph and Strep |
| Gram Positive Rods: | Bacillus, Clostridium, Listeria, Cornyebacterium |
| Catalase Positive: | Staph |
| Catalase Positive - Coagulase Positive: | Staph Aureus |
| Catalase Positive - Coagulase Negative | Staph Epidermidis, Staph Saphrophiticus |
| Catalase Negative: | Strep |
| Alpha Hemolytic Strep: | Strep viridans, Strep pneumoniae |
| Beta Hemolytic Strep: | Group A (strep pyogenes), Group B (strep agalactiae) |
| Gamma Hemolytic Strep: | Enterococcus |
| Zone of hemolysis in alpha: | Partial (green) |
| Zone of hemolysis in beta: | Complete (clear) |
| Zone of hemolysis in gamma: | None |
| CREST Syndrome | Calcionsis, Centromere antibody, Raynaud's, Esophageal Dysmotility, Sclerodactyly, Telengiectasias |
| TORCHHHES | Toxoplasmosis, Rubella, CMV, Herpes Simplex, Hepatitis B, HIV, Syphilis |