Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes). Among the halophiles, mannitol fermenters release acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol nonfermenter and a nonhalophilic mannitol nonfermenter. Here the medium acts as a ________ medium.
A. selective and differential
B. differential
C. enrichment
D. selective
Answer: D
Biology & Microbiology
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Answer the following statement true (T) or false (F)
Biology & Microbiology