Allows acetamide to be used as a sole carbon or nitrogen source. a monocarboxylic acid amide + H2O = a monocarboxylate + NH4(+) acetamide + H2O = acetate + NH4(+) Acetate induction mediated by facB regulatory gene and probably by amdA regulatory gene. Omega amino acid induction is dependent on amdR regulatory gene. Belongs to the amidase family.