if you have a dense laboratory culture of bacteria in a petridish, what is the best measure to report its density?

 you know the answer lies in the immediate next line!!

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  1. Standard plate count/Colony forming units (CFUs): Manual Colony count upto 30, afterwards will be mentioned as Too numerous to count (TNTC)
  2. Serial dilution with standard suspension(made up of McFarland Turbidity Standards)
  3. Direct microscopic count
  4. Turbidimetric Measurement: Measurement of cell concentration in suspension by optical density
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For calculating d density of bacteria. The dense solution has to be dilute it for at least 100 times this makes calculation a lot more easy. the total number should be determined appropriately
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