You are correct. Her dengue NS-1 antigen was positive. Dengue can sometimes cause a confluent erythematous or petechial rash that doesn’t blanch on pressure, w/ small areas of normal skin termed “isles of white in a sea of red.” These rashes appear during periods of defervescence and gradually fade in 1wk. They may be due to an immune response to the virus and are usually asymptomatic, w/ pruritus reported in a minority of pts. This pt improved, w/ resolution of abdominal pain and vomiting w/in 2 days of hospital admission, and she was discharged home after 4 days. Rash subsided w/in 3 days of d/c.

BMJ Case Reports CP 2020;13:e234154