Trimethoprim-SD149-5CT is referred as Trimethoprim TR 30mcg disc under Hi Media catalogue. Each pack of Trimethoprim-SD149-5CT contains 5 X 50 discs in blister pack. Each filter paper disc of Trimethoprim-SD149-5CT is of 6mm diameter with printed "TR 30 "on centre of each side of the disc. Each Trimethoprim-SD149-5CT disc is saturated with 30 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).