Antimicrobial worksheet | Biology homework help

1.  Which physical method of antimicrobial control would be most useful for complete elimination of microbes, and yet is quite good for heat-sensitive fluids such as serums, vaccines, etc.?


 2.  MATCH: type of microbial control method with example (may use answers to the right more than once)

___ pasteurization                               A.  gas

___ Povidone                                      B.  halogen

___ benzalkonium chloride                 C.  moist heat

___ silver nitrate                                  D.  dry heat

­­­___ merthiolate                                   E.  heavy metal

                                                            F.  alcohol

G.  dye

H.  phenol

I.  detergent


3.  WHY are gases the best of the chemical antimicrobial chemicals? 

 Name a commonly used gas used in this way.

What down-side/disadvantage is there to this gas?


4.  Quaternary ammonium compounds or cationic detergents are commonly used in disinfectant sprays, Hibiclens, disinfectant wipes, household cleaners, etc.  What is the best advantage of these?


5.  For each of the following objective, determine the MOST FEASIBLE method of sterilization (choose any one specific physical or chemical method).


empty plastic petri dishes (to be used again)


nutrient broth tubes to be sterilized 

enzyme solution

6.  One of the basement surgical rooms at Parkland Hospital has to be sealed off and is now not being used because of the last patient operated onBa patient with Ebola virus.  Ebola hemorrhagic fever has a high mortality rate, with symptoms of delirium and hemorrhaging.  It is also infectiousBtransmitted by blood products and possibly by aerosols.  Your job, as infection control nurse, is to bring this unused room back into use.

HOW will you disinfect the room (most feasible = economically, time-wise, manpower, etc.)?

Include WHY it is the BEST method. 

State any disadvantages that this method might have