You've Just Isolated a New Bacterium in Pure Culture, and You

question 56

Multiple Choice

You've just isolated a new bacterium in pure culture, and you culture it on a general purpose medium where its cells have a coccobacillus morphology.When you examine the cells after culturing on a variety of differential media, you find that in some cases, the cells appear as coccobacillus, but in others, they can be filamentous, cocci, or club-shaped.The best explanation for this observation is that

• A)the media were incubated at an incorrect temperature.
• B)the differential media are contaminated.
• C)the microscope is out of adjustment.
• D)the bacterium is pleomorphic.
• E)your culture has become contaminated.

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