Volume 84, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



A method of gametocyte quantitation in human blood was developed based on magnetic fractionation using commercially available magnetic fractionation columns (MFCs) and exploiting the magnetic susceptibility of mature gametocytes. The technique uses magnetic microspheres as a calibration standard. Microspheres are added to each blood sample to a known concentration. When exposed to a magnetic field, gametocytes and magnetic microspheres are preferentially captured inside MFCs. After removal of the magnetizing field, the magnetically captured material can be eluted, placed on a microscope slide that is stained, and counted by using conventional methods. The limits of quantitation for . gametocytes were determined from serial dilutions of blood samples with known gametocyte density. The upper limit was 1,000 gametocytes/μL. Quantitative analysis above this threshold is difficult because of an over-abundance of gametocytes. The lower limit was 0.1 gametocytes/μL, and there is a significant probability of a false-negative result below this level.


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  1. Karl S, David M, Moore L, Grimberg BT, Michon P, Mueller I, Zborowski M, Zimmerman PA, 2008. Enhanced detection of gametocytes by magnetic deposition microscopy predicts higher potential for Plasmodium falciparum transmission. Malar J 7: 66.[Crossref]
    [Google Scholar]
  2. Karl S, Davis TM, St.-Pierre TG, 2009. A comparison of the sensitivities of detection of Plasmodium falciparum gametocytes by magnetic fractionation, thick blood film microscopy, and RT-PCR. Malar J 8: 98.[Crossref]
    [Google Scholar]
  3. Schneider P, Bousema JT, Gouagna LC, Otieno S, van de Vegte-Bolmer M, Omar SA, Sauerwein RW, 2007. Submicroscopic Plasmodium falciparum gametocyte densities frequently result in mosquito infection. Am J Trop Med Hyg 76: 470474.
    [Google Scholar]
  4. Schneider P, Schoone G, Schallig H, Verhage D, Telgt D, Eling W, Sauerwein R, 2004. Quantification of Plasmodium falciparum gametocytes in differential stages of development by quantitative nucleic acid sequence-based amplification. Mol Biochem Parasitol 137: 3541.[Crossref]
    [Google Scholar]
  5. Trager W, Jensen JB, 1976. Human malaria parasites in continuous culture. Science 193: 673675.[Crossref]
    [Google Scholar]
  6. McKenzie FE, Prudhomme WA, Magill AJ, Forney JR, Permpanich B, Lucas C, Gasser RA Jr, Wongsrichanalai C, 2005. White blood cell counts and malaria. J Infect Dis 192: 323330.[Crossref]
    [Google Scholar]
  7. Babiker HA, Abdel-Wahab A, Ahmed S, Suleiman S, Ranford-Cartwright L, Carter R, Walliker D, 1999. Detection of low level Plasmodium falciparum gametocytes using reverse transcriptase polymerase chain reaction. Mol Biochem Parasitol 99: 143148.[Crossref]
    [Google Scholar]
  8. Buates S, Bantuchai S, Sattabongkot J, Han ET, Tsuboi T, Udomsangpetch R, Sirichaisinthop J, Tan-ariya P, 2010. Development of a reverse transcription-loop-mediated isothermal amplification (RT-LAMP) for clinical detection of Plasmodium falciparum gametocytes. Parasitol Int 59: 414420.[Crossref]
    [Google Scholar]

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  • Received : 23 Jul 2010
  • Accepted : 07 Oct 2010
  • Published online : 05 Jan 2011
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