Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
MacConkey Agar:
ingredients/indicator |
-Peptone
-Lactose -Bile salts -Neutral red |
|
|
What color is Mac when the bug ferments lactose?
|
Magenta, due to acid byproducts of the fermentation
|
|
|
What color is Mac when the bug is a lactose nonfermentor?
|
Yellow
|
|
|
What do the bile salts in MAC do?
|
Inhibit gram positives from growing
|
|
|
4 sections of the Haemophilus quad plate:
|
1. RTF with X and V
2. TSA with X 3. TSA with V 4. Chocolate with X and V |
|
|
What is the real name of X/V?
|
X = heman
V = NAD |
|
|
What is the gamma (non) hemolytic strep?
|
Strep group D - Enterococcus faecalis
|
|
|
Test for Strep grp D
|
Bile esculin darkening
|
|
|
What streps are alpha hemolytic?
|
-Strep pneumo
-Strep viridans -Strep grp D |
|
|
How do you test for Strep pneumo?
|
Optichin sensitive and pneumoslide
|
|
|
What streps are beta hemolytic?
|
-Strep pyogenes - A
-Strep agalactiae - B |
|
|
Test for Strep A
|
Bacitracin sensitive
|
|
|
Test for Strep B
|
Latex agglutination
|
|
|
How to differentiate staphs from streps
|
Catalase pos (staphs)
|
|
|
4 diagnostic features of Staph aureus:
|
-Grows on mannitol salt
-Hemolytic on sheeps blood -Gold on TSA -Coagulase pos |
|
|
How to tell apart Staph epidermidis from aureus:
|
-Grey on TSA
-Nonhemolytic -Coag neg |
