Address correspondence to Catherine W. M. Ong, Division of Infectious Disease, Department of Medicine, National University Health System, 5 Lower Kent Ridge Road, Singapore 119074. E-mail: email@example.com
Authors’ addresses: Catherine W. M. Ong and Paul A. Tambyah, Division of Infectious Disease, Department of Medicine, National University Health System, 5 Lower Kent Ridge Road, Singapore 119074, Tel: 65-6772-4362/4380, Fax: 65-6779-4361. Shir Ying Lee, Department of Haematology, National University Health System, 5 Lower Kent Ridge Road, Singapore 119074, Tel: 65-6772-4362, Fax: 65-6779-4361. Wee Hong Koh and Eng-Eong Ooi, Defence Medical and Environmental Research Institute, 27 Medical Drive, Singapore 11750, Tel: 65-6776-2255, Fax: 65-6775-9011.
Acknowledgments: The authors thank Seok Wei Chew for helping with the definitive testing by molecular methods for this case. KWH and OEE conducted the molecular analysis of the specimen. LSY made the figures. CWMO, PAT, and OEE all contributed in writing the paper.
Disclosure: PAT has received research support from Baxter, Pfizer, Merck, Wyeth, and Interimmune.
Johnson BW, Russell BJ, Lanciotti RS, 2005. Serotype-specific detection of dengue viruses in a fourplex real-time reverse transcriptase PCR assay. J Clin Microbiol 43 :4977–4983.
Rougemont M, Van Saanen M, Sahli R, Hinrikson HP, Bille J, Haton K, 2004. Detection of four Plasmodium species in blood from humans by 18S rRNA gene subunit-based and species specific real-time PCR assays. J Clin Microbiol 42 :5636–5643.
Somchai J, Putaporntip C, Iwasaki T, Sata T, Kanbara H, 2004. Naturally acquired Plasmodium knowlesi malaria in human, Thailand. Emerg Infect Dis 10 :2211–2213.
Chin W, Contacos PG, Coatney GR, 1965. A naturally acquired quotidian-type malaria in man transferable to monkeys. Science 149 :865.
Singh B, Sung LK, Matusop A, Radhakrishnan A, Shamsul SS, Cox-Singh J, Thomas A, Conway DJ, 2004. A large focus of naturally acquired Plasmodium knowlesi infections in human beings. Lancet 363 :1017–1024.
Ng OT, Ooi EE, Lee CC, Lee PJ, Ng LC, Pei SW, Tu TM, Loh JP, Leo YS, 2008. Naturally acquired human Plasmodium knowlesi infection, Singapore. Emerg Infect Dis 14 :814–816.
De Monbrison F, Gérome P, Chaulet JF, Wallon M, Picot S, Peyron F, 2004. Comparative diagnostic performance of two commercial rapid tests for malaria in a non-endemic area. Eur J Clin Microbiol Infect Dis 23 :784–786.
BinaxNow© Malaria Test Kit, 2007. Inverness Medical Professional Diagnostics, Scarborough, Maine. Rev. 2. 19 July 2007.
McCutchan TF, Piper RC, Makler MT, 2008. Use of malaria rapid diagnostic test to identify Plasmodium knowlesi infection. Emerg Infect Dis 14 :1750–1752.
Cox-Singh J, Davis TM, Lee KS, Shamsul SS, Matusop A, Ratnam S, Rahman HA, Conway DJ, Singh B, 2008. Plasmodium knowlesi malaria in humans is widely distributed and potentially life threatening. Clin Infect Dis 46 :165–171.