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USMLE
Micro - Lab hints
| Question | Answer |
|---|---|
| Pyoverdin | Pseudomonas aeruginosa |
| Pyocyanin | Pseudomonas aeruginosa |
| Coagulase positive | Staphylococcus aureus |
| Protein A | Staphylococcus aureus |
| M protein | Streptococcus pyogenes |
| Chocolate agar | Haemophilus influenzae |
| Factors X and V | Haemophilus influenzae |
| Tellurite plate | Corynebacterium diphtheriae |
| Dieterle silver stain | Legionella pneumophila |
| Tracheal cytotoxin | Bordetella pertussis |
| Alpha-hemolytic | Streptococcus pneumoniae |
| Anti-streptolysin O (ASO) | Streptococcus pyogenes |
| Filamentous hemagglutinin | Bordetella pertussis |
| Lancet-shaped diplococci | Streptococcus pneumoniae |
| Gram-negative coccobacilli | Haemophilus influenzae |
| Toxic shock syndrome toxin (TSST) | Staphylococcus aureus |
| Oxidase positive | Pseudomonas aeruginosa |
| Enterotoxin | Staphylococcus aureus |
| Exfoliatin (scalded skin syndrome) | Staphylococcus aureus |
| Optochin sensitive | Streptococcus pneumoniae |
| Bacitracin sensitive | Streptococcus pyogenes |
| Spe toxins | Streptococcus pyogenes |
| C-substance/CRP | Streptococcus pneumoniae |
| Club-shaped bacilli in palisades | Corynebacterium diphtheriae |
| Toxin that ADP-ribosylates EF-2 | Corynebacterium diphtheriae, Pseudomonas aeruginosa |
| Exotoxin A | Pseudomonas aeruginosa |
| Toxin that ADP-ribosylates Gi protein | Bordetella pertussis |
| Tumbling motility | Listeria monocytogenes |
| IgA protease | Streptococcus pneumoniae, Haemophilus influenzae |
| Quellung reaction | Streptococcus pneumoniae, Haemophilus influenzae, Neisseria meningitidis |
| Iron/cysteine supplement (charcoal-yeast agar) | Legionella pneumophila |
| Cold-agglutinin titer | Mycoplasma pneumoniae |
| Bacterial membrane contains cholesterol | Mycoplasma pneumoniae |
| Fried egg shaped colony | Mycoplasma pneumoniae |
| Cord factor | Mycobacterium tuberculosis |
| Niacin production | Mycobacterium tuberculosis |