Trimethoprim-SD148-5CT is referred as Trimethoprim TR 25mcg disc under Hi Media catalogue. Each pack of Trimethoprim-SD148-5CT contains 5 X 50 discs in blister pack. Each filter paper disc of Trimethoprim-SD148-5CT is of 6mm diameter with printed "TR 25 "on centre of each side of the disc. Each Trimethoprim-SD148-5CT disc is saturated with 25 mcg Trimethoprim.

Trimethoprim discs are used for antimicrobial susceptibilty test of bacteria using Bauer-Kirby Method. Generally Mueller Hinton Agar (M173/M1084) medium is used for susceptibility test.The susceptibility test is determined on the basis of zone of inhibition. The cultural response can be obeserved after incubating the standard culture at 35-37C for 18 hrs.

Storage and shelf life: It is advised to store the discs always at -20C after opening. The disc loses its stability at higher temperature (45C).