Why are pure cultures used for antimicrobial susceptibility testing

Exercise1-Disinfectants
 
1.   What does bactericidal mean?Bacteriostatic?Virucidal?Fungistatic?
 
2.   Why are control cultures necessary in evaluating disinfectants?
 
3.   What factors can influence the activity of a disinfectant?
 
4.   Why do microorganisms differing their response to disinfectants?
 
5.   What microorganisms are most susceptible to disinfectants?
 
EXERCISE2-AntimicrobialAgentSusceptibilityTestingand Resistance
 
1.   What is meant by antimicrobial resistance?Susceptibility?
 
2.   Why are pure cultures used for antimicrobial susceptibility testing?
 
3.   Would it be acceptable to use a mixed culture for this test?Why?
 
4.   List three factors that can influence the accuracy of the test.
 
5.   When performing a broth dilution test,why is it necessary to include a growth control tube?
 
A sterility control tube?
 

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