giardiasis
"Had been given this medicine when I was 8 weeks pregnant. I had contracted Giardia and was told I needed to have an abortion.  After exhausting all my efforts with local doctors and the like I called the CDC.  This was 1998.  I was placed on this med, and completed 14 days of the med and within 4 days the giardia was was back.  They doubled the doses and within 14 days I was cured again.  Just in time to get past my 1st trimester.  My daughter is 17 years old, She is highly allergic to penicillin and cephasporins.  And in 2012 I was diagnosed with breast cancer, with no family history.  Makes you wonder, but I have my baby <3"