final lab exam lecture questions Flashcards
1
Q
What is DRT, how can it be used to determine the effectiveness of an antimicrobial agent?
A
Decimal reduction time, or the time it takes to kill 90% of microbes. The faster the DCR, the more effective the antimicrobial agent
2
Q
Why is B. subtilis more resistant to disinfectants?
A
They form endospores
3
Q
What makes gram negative more resistant?
A
The membrane contains a waxy layer
4
Q
What factors can affect the disinfection process?
A
temperature, pH, relative humidity, and water hardness.
5
Q
Where do most antibiotics come from?
A
Fungi
