The early assay employed for measuring penicillin activity were based upon the q

Question

The early assay employed for measuring penicillin activity were based upon the quantity required to prevent growth of S. aureus over

Options:

A . 200 mm diameter zone using the cylinder plate method of assay

B . 24 mm diameter zone using the cylinder plate method of assay

C . None of these

D . 20 mm diameter zone using the cylinder plate method of assay

Answer: Option B

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