<prompt> Tetracyline ointment for mass prophylaxis-0.100.5015  <response>: Tetracyclines:These are broad-spectrum bacteriostatic agents with a considerable action against both gram-positive and gram-negative organisms as well as some fungi, rickettsiae and chlamydiae. This group includes tetracycline, chloetracycline and oxytetracycline. ref: A K KHURANA OPHTALMOLOGY,E4, Page-420 