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Lab 18: Use of Physical Agents to Control of Microorganisms

Lab 18: Use of Physical Agents to Control of Microorganisms

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A. INTRODUCTION TO THE CONTROL OF MICROORGANISMS

The next two labs deal with the inhibition, destruction, and removal of microorganisms. Control of microorganisms is essential in order to prevent the transmission of diseases and infection, stop decomposition and spoilage, and prevent unwanted microbial contamination.

Microorganisms are controlled by means of physical agents and chemical agents. Physical agents include such methods of control as high or low temperature, desiccation, osmotic pressure, radiation, and filtration. Control by chemical agents refers to the use of disinfectants, antiseptics, antibiotics, and chemotherapeutic antimicrobial chemicals.

Basic terms used in discussing the control of microorganisms include:

C. FILTRATION

Observe the 2 filtration plates and describe the results below.

Plate containing the filter (growth or no growth)
Plate streaked with filtrate (growth or no growth)

Conclusions:

Contributors and Attributions

Dr. Gary Kaiser (COMMUNITY COLLEGE OF BALTIMORE COUNTY, CATONSVILLE CAMPUS)