Emily cultured PA at her very first clinic visit after leaving the NICU. We did two cycles (28on/28off) before getting a clean culture. We were told we needed two clean cultures in a row before going off TOBI and we continued 28/28 for two more cycles. We were due to start a cycle when she was swabbed for the 2nd clean clture, so we did the cycle for "good measure." That was in July, she's cukltured clean ever since.