[Urine conservation by surface-active agents]

The antibacterial activity of surface-active substances -- catamine-AB, catapine B-300, GIPH-200 and Tego-51 was measured on the E. coli and Staphylococcus aureus cultures and anthracoid spores. The purpose of the measurements was to explore the use of the substances as urine conserving agents. Catamine-AB showed the highest antibacterial activity. Anthracoid spores exhibited the highest resistance to the substances; staphylococci were less resistant than E. coli. Investigations of the effectiveness of urine conservation demonstrated that catamine-AB at a concentration of 0.1% killed all Staph. aureus and E. coli. Therefore, it can be recommended as a urine conserving agent.