How to obtain a serial dilution concentrations of essential oil in Muller Hinton Broth to determine it's the inhibitory minimal concentration by microdilution? I mean wich volume of EO i have to add to each volume of MHB?
there is no specific rule for the volumes (as you fix your desired concentrations), for example 90 MH and 90 EO then your serial ditutions (90 every time from well to well), then add 10 bacteria (final volume 100). or multiply in 2; 180 and 180 with 20 bacteria (Final V 200)