Serratia marcescens, strain SR 1 was isolated from the local soil of a cultivated farm and it was screened as potent strain for chitinase production. Maximum chitinase production (77.3 u Mh -1 100 -1 ) was observed after 96 h of incubation period with pH 5.5 at 30°C under shake conditions (120 rpm). Compare to still flasks, shake culture with prawn fish colloidal chitin of 0.5% (w/v) concentration, showed a better enzyme yield. Crude enzyme showed antifungal activity against plant pathogens.
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