Thanks for such an amazing reply nickle xx I'm sorry your baby boy has had such a rough ride with renal issues from birth!

I am in NSW but met with another GP in the practice today about our specific situation.

The last 3 infections have been due to the bacteria "proteus mirabilis" which is apparently predominant in male UTI's (after e coli). The only concerning thing is this particular bug can become complicated when left untreated and is usually the bug responsible for pyelonephritis.

That said, he did say that the first infection being at age 5.5 years is far less concerning than if it were from under 4 and he said ultrasound these days gave an excellent indication of the condition of the kidneys and bladder as well as an indication of whether VUR is present.

I'm happy with that. The dr was also really reassuring that he doesn't expect to see any real damage from these infections because we've treated them immediately with bacteria sensitive antibiotics, he has only had 2 true UTI's and the lack of high fevers etc (which apparently is a good indication the infection remained lower in the urinary tract)

He explained that even if we found VUR at this stage treatment would be low dose daily antibiotic and management for breakthrough UTI's. This is of course unless we see any damage - again not expected but we would be negligent if we didn't check.