Excerise 5 Flashcards
1
Q
What is the most common way to separate cells? (Using what?)
A
Agar plate
2
Q
What is mannitol salt agar?
A
Selective medium because very few organism can withstand high concentrations of salt (7.5%NACL)
3
Q
What is blood agar?
A
Differential medium composed of a tryptic soy agar base with 5% sheep red blood cells
4
Q
What’s the purpose for of blood agar plates?
A
Help distinguish hemolytic bacteria that lose red blood cells from non hemolytic bacteria
5
Q
Beta hemolysis?
A
Complete breakdown of RNC
clear color
6
Q
Alpha hemolysis?
A
Pratical breakdown of RBC
green-brown discoloration
7
Q
Non hemolytic ( gamma hemolytic )
A
Nothing
Not pathogen
8
Q
What’s the function of an streak plate?
A
To isolate colonies
9
Q
Why is aseptic technique important?
A
To help avoid contamination ( heat is an example )
