<prompt> Diluent for trimethoprim in antibiotic disc for sensitivity testing isNa OH solutionNa hco3EthanolAcetic acid  <response>: Diluent for trimethoprim in antibiotic sensitivity testing is acetic acid Sod bicarbonate for amoxicillin and ceftazidime Ref: Textbook of Microbiology Baveja 4th ed Pg 629 