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Micro: Lab11; Ex.18

Control of Microbial growth

QuestionAnswer
True or false; many other types of chemical agents can be used to control microbial growth. True
Cidal A procedure which leads to the death of cells.
Static A procedure which only inhibits growth.
Bactericidal When an organism is being killed is a bacterium.
Fungicidal Killing of a fungus.
When are cidal measures used? When it is important that living microorganisms be completely eliminated.
When are Static measures used? When the organisms need not be killed, bu when their growth must be slowed or stopped.
What are some of the most commonly used chemicals classified as? Antiseptics, disinfectants, or antibiotics.
Antiseptics Are chemicals which kill or inhibit the growth of microorganisms and are safe to use on animal tissue.
Disinfectants Are chemicals able to kill microorganisms which are generally not safe to use on animal tissue. Most disinfectants are not used on animal tissue.
True or false; chemical treatment is the only method available to control microbial growth. False.
Other methods available to control microbial growth include; Cidal control measures (like sterilization by heat-autoclaving-and by use of ultraviolet radiation) and static control measures such as freezing and drying.
Autoclaving Sterilization by heat.
Microbial control method choice depends on what? On the material to be treated, the requirement for cell death vs. growth inhibition, the organism to be controlled, and characteristics of the method such as ease of use, danger to the user, and cost.
Tabulated Compiling results.
Point of experiment? We will test the effectiveness of a variety of antiseptics and disinfectants on basical growth.
Cultures to be used? Escherichia coli and Staphylococcus epidermidis.
Agar used? Mueller-Hinton Agar.
Invert and incubate the plates at ____degrees Celsius for ___to_____days. 37 for 2 to 5 days.
Created by: kimblekn
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