MRCP2-2527
A 25 year-old traveler presents with a febrile illness, ten days after returning from a trip to India. She delayed seeking medical attention because she assumed it was a common illness, having experienced similar symptoms during previous travels. She did not take malaria prophylaxis due to concerns about side effects. The illness began three days after her return, with a recorded temperature of 38.6°C. She also complains of severe joint pains and headache, particularly behind her eyes. Today she has noticed some bruising and bleeding from her gums.
On examination, her temperature is 38.4°C and she has a widespread macular rash with areas of sparing. There are also petechial haemorrhages on her limbs. Cardio-respiratory examination is unremarkable except for a heart rate of 110. Blood pressure is 120/80 mmHg. On palpation of the abdomen, you discover tender hepatomegaly. Neurological examination is normal.
After applying a tourniquet to take a blood sample, you notice that the area under the tourniquet has become bruised.
Results of blood tests are as follows:
Hb 13.8 g/dl
MCV 92.4 fl
Haematocrit 0.54
Platelets 25 x10^9/l
WCC 5.9 x10^9/l
Na+ 136 mmol/l
K+ 4.2 mmol/l
Urea 4.1 mmol/l
Creatinine 75 µmol/l
ALT 58 IU/l
ALP 72 IU/l
Bilirubin 12 mol/l
Albumin 30 g/l
Rapid Malaria test Negative
Thick and thin blood films Pending
What is the most likely diagnosis?