Fungi were relatively more sensitive than bacteria to onion extract. MIC values were higher in case of dried and autoclaved extracts indicating inactivation of antimicrobials due to treatments. All forms of onion extracts were equally antimicrobial against
bacteria and MBC and MLC values were same. Fungi were relatively more sensitive to fresh extract of onion indicating inactivati on of active principle due to
heat treatment. MLC values were significantly higher than that of MIC values of fresh extract of onion.