Media function testing should include all of the following except:
a. check test organism viability for expected growth.
b. confirm identity of organism using Gram stain.
c. compare performance to previous lot number of media.
d. reincubate for additional time period if no growth is evident.
D
Media function testing should be performed that includes growth of quality control organisms in comparison to previous lot numbers or new lot numbers if growth does not appear correct. Gram stain characteristics of the known organism should be performed to determine correct growth. Reincubation would enhance the growth of contaminating organisms unless the organism requires extended growth times under normal conditions.
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