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Microbiologist.in
Pharma QC microbiology, in your pocket
Pick the countable plates from a dilution series, count colonies yourself, calculate CFU/mL and decide compliance the way the pharmacopoeia does.
Count colonies on countable plates, calculate the count per mL from duplicate plates and dilution, and interpret the result against a microbial limit.
Every attempt uses new data. You need 70 % to pass. Explanations appear after each step.