<s>[INST] hi,my baby is 5 months and 20 days old....i got his urine checked for jaundice when he was 20 days old...it had around 30 pus cells...jaundice was ok but ever since he my doctor has kept him on septran.. a detailed ultra sound has been done every two months and it is always normal.now again he has got around 25 pus cells...i am giving him ZIPRAX 100...just wanted to know what can be the reason for him having pus cells again and again...my baby feels no discomfort at all.no fever,no weight loss,never cries and is a happy baby..he weighs 10.5 kgs...i get his urine checked every 2 weeks...please let me know why it happens [/INST] Hello, I feel your child is being treated for Urinary tract infection (UTI) and not for jaundice as mentioned by you. Let me inform you the normal dictum that we follow in pediatrics for any case of UTI. As soon as we diagnose a case of UTI and if he/she is <1-year-old-- USG has to be done at earliest, MCU is recommended at 2-3 weeks later and a DMS scan is carried out at 2-3 months after treatment. All these are done to rule out at serious underlying condition and meanwhile till all these tests are done child is on prophylactic antibiotic. Your child may seem normal, and you may wonder why my child is having all these tests and medication. But as healthcare provider we need to think of remote possibilities of serious problems too. Hope I have cleared your doubt. </s>