Listerine could be useful for more than just curing bad breath. The 137-year-old mouthwash may kill the STD gonorrhea, according to recent findings from the Melbourne Sexual Health Center in Australia. The study found that the minty mouthwash did kill gonorrhea bacteria in subjects' throats and in petri dishes. "Listerine mouthwashes at dilutions of up to 1:4 for 1 min resulted in significant reduction of total N. gonorrhoeae counts," the medical trial found. "After gargling the allocated solution, men in the Listerine group were significantly less likely to be culture positive on the pharyngeal surface (52%) compared with men in the saline group (84%)." Research fellow Dr. Eric PF Chow led the experiment. He is currently conducting a larger trial on 500 men to see if Listerine can fight gonorrhea bacteria over a long period of time. His team will also test different Listerine products and other mouthwash brands. "This data suggest Listerine, significantly reduces the amount of N. gonorrhoeae on the pharyngeal surface. With daily use it may increase gonococcal clearance and have important implications for prevention strategies," the study concluded. Test subjects participated from May 2015 to February 2016. Flavors Cool Mint and Total Care were used in the study. Listerine is reportedly helpful for a variety of health-related uses -- from getting rid of lice to relieving bug bites.