what are the variations of streak plate method?
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Quadrant Streaking showing the colonies thinning as the streaking moves clockwise. Streak plate technique is used for the isolation into pure culture of the organisms (mostly bacteria), from mixed population. The inoculum is streaked over the agar surface in such a way that it “thins out” the bacteria.
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The basic idea is to use repeated reductions in the number of organisms initiating a streak across and Agar surface in combination with reductions in number of organisms that are streaked across the Agar , together as a means of reducing bacterial densities down to insolated colony-forming units.
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