Abstract
Summary
Technics requiring only such equipment and supplies as are already available in any bacteriological laboratory are presented (1) for developing reference curves and tables which may be used (a) for determination of penicillin concentration of solutions employed therapeutically and (b) for following readily the rate of decrease of penicillin potency, (2) for converting growth inhibition zones (for staphylococci) on seeded agar to probable inhibiting concentrations of penicillin in broth, and (3) which make feasible the tentative allocation of bacteria, as respects their susceptibility to penicillin, simultaneously with the determination of the types of organisms encountered, in lesions and exudates, within 15-18 hours after collection of specimens.
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