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  #1  
Old 11-04-2012
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Bacteria Bacterial Growth Phases and Antibiotics

A bacterial growth pattern is being studied in a laboratory and a curve is drawn k/a Bacterial growth curve. Now they want to study the effect of antibiotics in different phases of bacterial growth. Which of the following phase do you think is most responsive to antibiotic therapy?
A. Lag phase
B. Log phase
C. Stationary phase
D. Death phase
E. Equally responsive at all phases
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Old 11-04-2012
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my answer is ... stationary phase..
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Old 11-04-2012
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The answer is Log Phase in other words Exponential Phase when the graph is going upwards x^2

During this phase the replicative potential allows antibiotics to be taken in thereby killing it.
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Old 11-04-2012
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B) log phase

thanks
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Old 11-04-2012
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Its B. log phase
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Old 11-04-2012
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Nice question.
My friend had the same question in his exam but I couldn't find the answer
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my ans is log phase
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Old 11-05-2012
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Correct Answer Perfecto!!

Yes, the answer is log phase during which bacteria are rapidly dividing..........
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Old 11-05-2012
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B. Log phase
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Old 11-05-2012
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One point I'd like to raise. Cells definitely divide rapidly during log phase. But during Stationary phase also cells continue to divide, its just that the number of new cells equal the number of dying cells. So why is only log phase being considered?
Thanks
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Old 11-05-2012
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Quote:
Originally Posted by Kanishk View Post
One point I'd like to raise.Cells definitely divide rapidly during log phase.But during Stationary phase also cells continue to divide,its just that the number of new cells equal the number of dying cells.So why is only log phase being considered?
Thanks

ya you're right.......but the question asking abt. most responsive phase to antibiotic therapy.......it is in log phase that bacteria will produce all the cell properties(cell wall,membrane) and cell divisions are active----so this is the phase,where most antibiotics could be effective...after the full growth of bacteria it's not easy to kill than in earlier phase........hope it clears........thanks
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