Week 2 Flashcards
1
Q
What is Serial Dilution?
A
A Stepwise dilution of a substance in solution
2
Q
What are the two main methods used to know how many bacteria are present?
A
- Hemocytometer- Direct Count
- Dilution- Indirect count
3
Q
what is the concentration cell count equation?
A
Cells/ml = ______total#cells________________
[(total # of 0.04mm2 boxes counted) x (4*10-6ml) x (dilution)]
4
Q
Coccus
A
Single Coccus ( one circle )
5
Q
Diplococcus
A
pair of two cocci ( two circles )
6
Q
Tetrad
A
Group of 4 cells in arranged in a square
7
Q
Streptococcus
A
Chain of Cocci
8
Q
Staphylococcus
A
Cluster of cocci
9
Q
Bacillus
A
Single Rod
10
Q
Streptobacillus
A
Chain of rods
11
Q
Is Staphylococcus Gram - or +
A
it is Gram +, arranged in irregular cluster
12
Q
Is E. Coli Gram - or +
A
it is Gram -, Bacillus
