please Suppose you performed a Gram stain on a sample from a pure culture of bac
ID: 54339 • Letter: P
Question
please Suppose you performed a Gram stain on a sample from a pure culture of bacteria and observed a field of red and purple cocci. Adjacent cells were not always the same color. What do you conclude? Suppose you are viewing a Gram-stained field of red rods and purple cocci through the microscope. What do you conclude? Considering you can't identify bacteria from a Gram stain, why might a physician perform a Gram stain on a sample before prescribing an antibiotic? If you performed a Gram stain on human cells, what would happen?Explanation / Answer
1. At first glance it may seem that purple cells are gram positive and red cells are gram negative but the absence of same color among adjacent cells point towards the culture being old. Thus, I conclude that the culture is old.
2. Since the culture contains different types of bacteria with different shaped therefore, I conclude that it is a mixed culture.
3. The sensitivity correlates with the type of cell wall present. Hence to determine its sensitivity the physician will order the test.
4. Since human cells lack a cell wall therefore, primary stain would be removed easily.
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