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Why is the presence of air bubbles a sign of contamination

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Question -

1. For what specific purpose was Gram staining developed for? What is it used for today?

2. Why is the presence of air bubbles a sign of contamination?

3. Why is a Gram stain helpful when monitoring bacterial contamination in food or investigating a foodborne illness outbreak?

4. Do you think bacteria always have to be Gram-stained in order to view them? Why or why not?

Reference no: EM131827421

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