My 18 year old son had a virus where heran 104 fevers x 5days. day 6-8 down to 101 he had N/V and suffered from dehydration and required IV fluid replacement. The only abnormal labs are high bilirubin and mildly low platelettes. I was advised today that they want to do a glucose challenge? Why?
HI Thanks for posting your query.  A low platelet increases the suspicion of viral fever especially Dengue Fever. Low platelet is also seen in Malaria and Leptospirosis.  Kindly ask your doctor to test for the above infections.  Glucose challenge is done to check whether the patient is diabetic or not. Maybe his blood sugars checked be on the higher levels and hence they want to confirm it. Hope this information was useful to you. Any clarifications feel free to ask.