Were all babies from 1997-present screened for cystic fibrosis in the state of texas? also, at what age do the symptoms for cystic fibrosis set in?

No: If memory serves me well. CF was not added to the newborn screening program until later.About 10 years back, the state expanded its screening program from 5 to more than 25 conditions, including CF. The symptoms might present with bowel blockage at birth, obnoxious smelly stools in infancy or may not have obvious symptoms for years. There is some individual variation from case to case.