Variability in the ability of the malaria parasite Plasmodium falciparum to invade human erythrocytes is postulated to be an important determinant of disease severity. Both the parasite multiplication rate and erythrocyte selectivity are important parameters that underlie such variable invasion. We have established a flow cytometry-based method for simultaneously calculating both the parasitemia and the number of multiply-infected erythrocytes. Staining with the DNA-specific dye SYBR Green I allows quantitation of parasite invasion at the ring stage of parasite development. We discuss in vitro and in vivo applications and limitations of this method in relation to the study of parasite invasion. Am. J. Hematol. 85:234-237, 2010. (C) 2010 Wiley-Liss, Inc.
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Obihiro Univ Agr & Vet Med, Natl Res Ctr Protozoan Dis, Obihiro, Hokkaido 0808555, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Recuenco, Frances Cagayat
Kobayashi, Kyousuke
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Univ Tokyo, Inst Med Sci, Dept Host Parasite Interact, Div Microbiol & Immunol,Minato Ku, Tokyo 1088639, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Kobayashi, Kyousuke
Ishiwa, Akiko
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Ishiwa, Akiko
Enomoto-Rogers, Yukiko
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Biomat Sci, Lab Sci Polymer Mat,Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Enomoto-Rogers, Yukiko
Fundador, Noreen Grace V.
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Biomat Sci, Lab Sci Polymer Mat,Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Fundador, Noreen Grace V.
Sugi, Tatsuki
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Obihiro Univ Agr & Vet Med, Natl Res Ctr Protozoan Dis, Obihiro, Hokkaido 0808555, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Sugi, Tatsuki
Takemae, Hitoshi
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Obihiro Univ Agr & Vet Med, Natl Res Ctr Protozoan Dis, Obihiro, Hokkaido 0808555, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Takemae, Hitoshi
Iwanaga, Tatsuya
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Iwanaga, Tatsuya
Murakoshi, Fumi
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Murakoshi, Fumi
Gong, Haiyan
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Gong, Haiyan
Inomata, Atsuko
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan
Inomata, Atsuko
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Horimoto, Taisuke
Iwata, Tadahisa
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Univ Tokyo, Grad Sch Agr & Life Sci, Dept Biomat Sci, Lab Sci Polymer Mat,Bunkyo Ku, Tokyo 1138657, JapanUniv Tokyo, Grad Sch Agr & Life Sci, Dept Vet Microbiol, Bunkyo Ku, Tokyo 1138657, Japan