UTI is the most common infection in a newborn. It is very treatable. Geez, I've had both my boys cathed, the second one so many times, without incidence of retraction, both in Salt Lake City and in Houston TX. Not the meccas of intactness exactly.
The bag is not reliable. Someone already mentioned above. And yes, you can have NO elevated white blood cells and still have a low level kidney infection.
Suprapubic aspiration is much more painful and more invasive than an injection. And it will scar your bladder which is a far more important organ in the scheme of things. It requires fluoroscopy and being strapped to a board to be held completely still.
The weirdest thing though is that the DOCTOR wasn't gonna cath the baby in all likelihood. The nurse was. Talking calmly and gently to the nurse who was going to do the procedure, and explaining how to do what they need to do through the process is a much more effective technique than refusing treatment. In fact, first assessing the nurse's skill level, making sure it wasn't a student, asking how many intact boys they see, and perhaps offering yourself to show them just how much they may open the foreskin ever so gently. I don't know Frank's cathing protocol, but I wouldn't want a nurse fishing around inside the baby's foreskin for the meatus.
Now the doctor I wouldn't trust to the cath because they aren't trained, unless they are a urologist. And geez, even the very pro-circ urologists that I know never retract the foreskin to cath.
Seriously, I don't have enough fingers and toes to count the number of times my second son has been cathed by many different people.
Nurses, especially in pediatric hospitals, usually respond quite well to gentle instructions and information regarding your baby and what you would like done.
I think the mistake is people think they need to convince the doctor of their point of view in order to the such and such procedure. This is not true. In the words of my urologist: "You don't have to convince anyone of anything. You just tell them what they can and cannot do."
So in this instance, say, "I understand that there is a very high chance of a UTI in a baby with a fever and no other signs of infection. I'm willing to let you catherize the baby for the sample as it is more likely to produce a clean sample than a bag and is certainly less invasive than suprapubic aspiration. However, I would like for a seasoned nurse, not a student nurse, to do the procedure, and I would like to direct him or her on how I want my baby's foreskin to be handled in order to find the meatus and introduce the catheter into his urethra."
Throw in a couple of Latin words and they are good to go.
But maybe I just spend too much time in the ER.