I will search through my medical reports tomorrow and see what they prescribed. Righ now I could not tell you. What I do remember is that the infectious disease Dr says this is a rare one and told me you get it through the water. He told me to get a water filter for my shower head. I think the bacteria comes from the pipes and not necessarily the water supply. I do know that a plumber told me that we need to drain our hot water heater once a year because it gets so much gunk in the bottom and that includes bacteria. Also keep your water more hot than the average person. I think that I read it should be 130 degrees. I will see what I can find in my records tomorrow on the drugs that I took.