Pre-lab 7: Control of Microbial Growth February 22-24 (To be turned in PRIOR to start of recitation for lab 7) Name:______TD Khang_______________________________ Objectives: The objectives of this experiment are to examine the streak plates from last week, identify isolated colonies, and record results. Another objective is to determine the number of colonies in the food supply and use that number to identify the initial concentration of bacteria sample. Another objective is to determine how effective disinfectants and antiseptics are at killing bacteria, germs and other microorganisms. Another objective is to test how certain microorganisms react to different antibiotics. Another objective is to understand Enzyme Linked Immunosorbent Assays. Procedure for Microbes in Food supply: 1. Observe the different dilutions of agar plates. 2. Use the formula, original sample concentration = (# of colonies counted/volume plated) x (1/dilution counted), to determine the original bacteria concentration. 3.
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This note was uploaded on 02/29/2012 for the course BIO 101 taught by Professor Desaix during the Spring '11 term at UNC.