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An 11-year-old boy with Plasmodium falciparum malaria and dengue co-infection
  1. Satja Issaranggoon na ayuthaya,
  2. Anchalee Wangjirapan,
  3. Peninnah Oberdorfer
  1. Department of Pediatrics, Faculty of Medicine, Chiang Mai, Thailand
  1. Correspondence to Dr Peninnah Oberdorfer, aoberdor{at}


Malaria and dengue fever are major mosquito-borne public health problems in tropical countries. The authors report a malaria and dengue co-infection in an 11-year-old boy who presented with sustained fever for 10 days. The physical examination revealed a flushed face, injected conjunctivae and left submandibular lymphadenopathy. His peripheral blood smear showed few ring-form trophozoites of Plasmodium falciparum. His blood tests were positive for dengue NS-1 antigen and IgM antibody, and negative for IgG antibody. After the initiation of antimalarial treatment with artesunate and mefloquine, his clinical condition gradually improved. However, he still had low-grade fever that persisted for 6 days. Finally, he recovered well without fluid leakage, shock or severe bleeding. This case report emphasises that early recognition and concomitant treatment of malaria and dengue co-infection in endemic areas can improve clinical outcome and prevent serious complications.

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