Dengue in Children

A 5-year-old girl from Mumbai presents with fever for 6 days, severe abdominal pain, vomiting, and a platelet count of 45,000/μL. NS1 antigen is negative. IgM antibody against dengue is positive. She is suspected to have dengue hemorrhagic fever. Which investigation is most appropriate to assess the severity and guide fluid management?

A 6-year-old boy from Delhi presents with fever, myalgia, and rash on day 4 of illness. Platelet count is 80,000/μL. Which of the following is NOT a recognized feature of dengue fever in children?

A 6-year-old boy from Delhi presents on day 4 of fever with platelet count of 80,000/μL, haematocrit rise of 8% from baseline, and mild abdominal pain. He is alert, has normal blood pressure, and capillary refill is <2 seconds. What is the most appropriate next step in management?

A 5-year-old girl from Chennai is on day 5 of dengue fever. She now has tachycardia (HR 120/min), systolic BP 90 mmHg (baseline ~105 mmHg), weak pulses, delayed capillary refill (3 seconds), and cold extremities. Haematocrit has risen from 35% to 48%. Platelet count is 45,000/μL. She is restless and has passed minimal urine in the last 4 hours. What is the most appropriate immediate next step?

A 7-year-old boy from Chennai presents with fever for 5 days, severe myalgia, and headache. On examination, he has a petechial rash on the trunk and a positive tourniquet test. His platelet count is 85,000/μL, haemoglobin 14 g/dL, and haematocrit 38%. Dengue serology (IgM) is positive. His blood pressure is 98/62 mmHg, heart rate 110/min, and capillary refill time is 2 seconds. What is the most appropriate immediate management?