2000. Papua New Guinea National Health Plan 2001–2010. Port Moresby: Papua New Guinea Ministry of Health.
Peters W, 1960. Studies on the epidemiology of malaria in New Guinea. 1. Holoendemic malaria—a clinical picture. Trans R Soc Trop Med Hyg 54 :242–249.
Peters W, Standfast HA, 1960. Studies on the epidemiology of malaria in New Guinea. 2. Holoendemic malaria—the entomological picture. Trans R Soc Trop Med Hyg 54 :249–254.
Desowitz RS, Saave JJ, 1965. The application of the haemagglutination test to a study of the immunity to malaria in protected and unprotected groups in Australian New Guinea. Bull WHO 32 :149–159.
Cattani JA, Tulloch JL, Vrbova H, Jolley D, Gibson FD, Moir JS, Heywood PF, Alpers MP, Stevenson A, Clancy R, 1986. The epidemiology of malaria in a population surrounding Madang, Papua New Guinea. Am J Trop Med Hyg 35 :3–15.
Desowitz RS, Spark RA, 1987. Malaria in the Maprik area of the Sepik region, Papua New Guinea: 1957–1984. Trans R Soc Trop Med Hyg 81 :175–176.
Cox MJ, Kum DE, Tavul L, Narara A, Raiko A, Baisor M, Alpers MP, Medley GF, Day KP, 1994. Dynamics of malaria parasitaemia associated with febrile illness in children from a rural area of Madang, Papua New Guinea. Trans R Soc Trop Med Hyg 88 :191–197.
Genton B, al-Yaman F, Beck HP, Hii J, Mellor S, Narara A, Gibson N, Smith T, Alpers MP, 1995. The epidemiology of malaria in the Wosera area, East Sepik Province, Papua New Guinea, in preparation for vaccine trials. I. Malariometric indices and immunity. Ann Trop Med Parasitol 89 :359–376.
Genton B, al-Yaman F, Beck HP, Hii J, Mellor S, Rare L, Ginny M, Smith T, Alpers MP, 1995. The epidemiology of malaria in the Wosera area, East Sepik Province, Papua New Guinea, in preparation for vaccine trials. II. Mortality and morbidity. Ann Trop Med Parasitol 89 :377–390.
Shankar AH, Genton B, Semba RD, Baisor M, Paino J, Tamja S, Adiguma T, Wu L, Rare L, Tielsch JM, Alpers MP, West KP Jr, 1999. Effect of vitamin A supplementation on morbidity due to Plasmodium falciparum in young children in Papua New Guinea: A randomised trial. Lancet 354 :203–209.
Bruce MC, Donnelly CA, Alpers MP, Galinski MR, Barnwell JW, Walliker D, Day KP, 2000. Cross-species interactions between malaria parasites in humans. Science 287 :845–848.
Mehlotra RK, Lorry K, Kastens W, Miller SM, Alpers MP, Bockarie M, Kazura JW, Zimmerman PA, 2000. Random distribution of mixed species malaria infections in Papua New Guinea. Am J Trop Med Hyg 62 :225–231.
Mehlotra RK, Kasehagen LJ, Baisor M, Lorry K, Kazura JW, Bockarie MJ, Zimmerman PA, 2002. Malaria infections are randomly distributed in diverse holoendemic areas of Papua New Guinea. Am J Trop Med Hyg 67 :555–562.
Mueller I, Bjorge S, Poigeno G, Kundi J, Tandrapah T, Riley ID, Reeder JC, 2003. The epidemiology of malaria in the Papua New Guinea highlands: 2. Eastern Highlands Province. P N G Med J 46 :166–179.
Mueller I, Taime J, Ivivi R, Yala S, Bjorge S, Riley ID, Reeder JC, 2003. The epidemiology of malaria in the Papua New Guinea highlands: 1. Western Highlands Province. P N G Med J 46 :16–31.
Mueller I, Namuigi P, Kundi J, Ivivi R, Tandrapah T, Bjorge S, Reeder JC, 2005. Epidemic malaria in the highlands of Papua New Guinea. Am J Trop Med Hyg 72 :554–560.
Brabin BJ, Ginny M, Alpers M, Brabin L, Eggelte T, Van der Kaay HJ, 1990. Failure of chloroquine prophylaxis for falciparum malaria in pregnant women in Madang, Papua New Guinea. Ann Trop Med Parasitol 84 :1–9.
al-Yaman F, Genton B, Mokela D, Narara A, Raiko A, Alpers MP, 1996. Resistance of Plasmodium falciparum malaria to amodiaquine, chloroquine and quinine in the Madang Province of Papua New Guinea. P N G Med J 39 :16–22.
Genton B, Anders RF, Alpers MP, Reeder JC, 2003. The malaria vaccine development program in Papua New Guinea. Trends Parasitol 19 :264–270.
Booth PB, Tills D, Warlow A, Kopec AC, Mourant AE, Teesdale P, Hornabrook RW, 1982. Red cell antigen, serum protein and red cell enzyme polymorphisms in Karkar Islanders and inhabitants of the adjacent North Coast of New Guinea. Hum Hered 32 :385–403.
Mourant AE, Tills D, Kopec AC, Warlow A, Teesdale P, Booth PB, Hornabrook RW, 1982. Red cell antigen, serum protein and red cell enzyme polymorphisms in Eastern Highlanders of New Guinea. Hum Hered 32 :374–384.
Brabin L, Brabin BJ, 1990. Malaria and glucose 6-phosphate de-hydrogenase deficiency in populations with high and low spleen rates in Madang, Papua New Guinea. Hum Hered 40 :15–21.
Genton B, al-Yaman F, Mgone CS, Alexander N, Paniu MM, Alpers MP, Mokela D, 1995. Ovalocytosis and cerebral malaria. Nature 378 :564–565.
Allen SJ, O’Donnell A, Alexander ND, Mgone CS, Peto TE, Clegg JB, Alpers MP, Weatherall DJ, 1999. Prevention of cerebral malaria in children in Papua New Guinea by southeast Asian ovalocytosis band 3. Am J Trop Med Hyg 60 :1056–1060.
Zimmerman PA, Woolley I, Masinde GL, Miller SM, McNamara DT, Hazlett F, Mgone CS, Alpers MP, Genton B, Boatin BA, Kazura JW, 1999. Emergence of Fy*A(null) in a Plasmodium vivax-endemic region of Papua New Guinea. Proc Natl Acad Sci USA 96 :13973–13977.
Patel SS, Mehlotra RK, Kastens W, Mgone CS, Kazura JW, Zimmerman PA, 2001. The association of the glycophorin C exon 3 deletion with ovalocytosis and malaria susceptibility in the Wosera, Papua New Guinea. Blood 98 :3489–3491.
Maier AG, Duraisingh MT, Reeder JC, Patel SS, Kazura JW, Zimmerman PA, Cowman AF, 2003. Plasmodium falciparum erythrocyte invasion through glycophorin C and selection for Gerbich negativity in human populations. Nat Med 9 :87–92.
Patel SS, King CL, Mgone CS, Kazura JW, Zimmerman PA, 2004. Glycophorin C (Gerbich antigen blood group) and band 3 polymorphisms in two malaria holoendemic regions of Papua New Guinea. Am J Hematol 75 :1–5.
al-Yaman F, Genton B, Mokela D, Narara A, Raiko A, Alpers MP, 1996. Resistance of Plasmodium falciparum malaria to amodiaquine, chloroquine and quinine in the Madang Province of Papua New Guinea, 1990–1993. P N G Med J 39 :16–22.
Muller I, Bockarie M, Alpers M, Smith T, 2003. The epidemiology of malaria in Papua New Guinea. Trends Parasitol 19 :253–259.
Mehlotra RK, Mattera G, Bhatia K, Reeder JC, Stoneking M, Zimmerman PA, 2005. Insight into the early spread of chloroquine-resistant Plasmodium falciparum infections in Papua New Guinea. J Infect Dis 192 :2174–2179.
Bruce MC, Galinski MR, Barnwell JW, Donnelly CA, Walmsley M, Alpers MP, Walliker D, Day KP, 2000. Genetic diversity and dynamics of plasmodium falciparum and P. vivax populations in multiply infected children with asymptomatic malaria infections in Papua New Guinea. Parasitology 121 :257–272.
Mueller I, Taime J, Ibam E, Kundi J, Lagog M, Bockarie M, Reeder JC, 2002. Complex patterns of malaria epidemiology in the highlands region of Papua New Guinea. P N G Med J 45 :200–205.
McNamara DT, Kasehagen LJ, Grimberg BT, Cole-Tobian J, Collins WE, Zimmerman PA, 2006. Diagnosing infection levels of four human malaria parasite species by a polymerase chain reaction/ligase detection reaction fluorescent microsphere-based assay. Am J Trop Med Hyg 74 :413–421.
Hii JL, Smith T, Mai A, Mellor S, Lewis D, Alexander N, Alpers MP, 1997. Spatial and temporal variation in abundance of Anopheles (Diptera:Culicidae) in a malaria endemic area in Papua New Guinea. J Med Entomol 34 :193–205.
Hii JL, Smith T, Mai A, Ibam E, Alpers MP, 2000. Comparison between anopheline mosquitoes (Diptera: Culicidae) caught using different methods in a malaria endemic area of Papua New Guinea. Bull Entomol Res 90 :211–219.
McNamara DT, Thomson JM, Kasehagen LJ, Zimmerman PA, 2004. Development of a multiplex PCR-ligase detection reaction assay for diagnosis of infection by the four parasite species causing malaria in humans. J Clin Microbiol 42 :2403–2410.
Zimmerman PA, Buckler-White A, Alkhatib G, Spalding T, Kubofcik J, Combadiere C, Weissman D, Cohen O, Rubbert A, Lam G, Vaccarezza M, Kennedy PE, Kumaraswami V, Giorgi JV, Detels R, Hunter J, Chopek M, Berger EA, Fauci AS, Nutman TB, Murphy PM, 1997. Inherited resistance to HIV-1 conferred by an inactivating mutation in CC Chemokine Receptor 5: Studies in populations with contrasting clinical phenotypes, defined racial background, and quantified risk. Mol Med 3 :23–36.
Ross R, 1910. The measurement of malaria (section 31). Ross R, ed. The Prevention of Malaria. New York: E.P. Dutton & Company, 217–246.
Knowles R, White RS, 1930. Studies in the parasitology of malaria. Indian Medical Research Memoirs 18 :436.
2000. WHO/MAL/2000.1091 New Perspectives in Malaria Diagnosis. Geneva: World Health Organization.
Ohrt C, Purnomo, Sutamihardja MA, Tang D, Kain KC, 2002. Impact of microscopy error on estimates of protective efficacy in malaria-prevention trials. J Infect Dis 186 :540–546.
McKenzie FE, Sirichaisinthop J, Miller RS, Gasser RA Jr, Wongsrichanalai C, 2003. Dependence of malaria detection and species diagnosis by microscopy on parasite density. Am J Trop Med Hyg 69 :372–376.
O’Meara WP, McKenzie FE, Magill AJ, Forney JR, Permpanich B, Lucas C, Gasser RA Jr, Wongsrichanalai C, 2005. Sources of variability in determining malaria parasite density by microscopy. Am J Trop Med Hyg 73 :593–598.
Prudhomme O’meara W, Remich S, Ogutu B, Lucas M, Mtalib R, Obare P, Oloo F, Onoka C, Osoga J, Ohrt C, McKenzie FE, 2006. Systematic comparison of two methods to measure parasite density from malaria blood smears. Parasitol Res.
Mayxay M, Pukrittayakamee S, Newton PN, White NJ, 2004. Mixed-species malaria infections in humans. Trends Parasitol 20 :233–240.
Lee MA, Tan CH, Aw LT, Tang CS, Singh M, Lee SH, Chia HP, Yap EP, 2002. Real-time fluorescence-based PCR for detection of malaria parasites. J Clin Microbiol 40 :4343–4345.
Perandin F, Manca N, Calderaro A, Piccolo G, Galati L, Ricci L, Medici MC, Arcangeletti MC, Snounou G, Dettori G, Chezzi C, 2004. Development of a real-time PCR assay for detection of Plasmodium falciparum, Plasmodium vivax, and Plasmodium ovale for routine clinical diagnosis. J Clin Microbiol 42 :1214–1219.
Rougemont M, Van Saanen M, Sahli R, Hinrikson HP, Bille J, Jaton 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.
Mangold KA, Manson RU, Koay ES, Stephens L, Regner M, Thomson RB Jr, Peterson LR, Kaul KL, 2005. Real-time PCR for detection and identification of Plasmodium spp. J Clin Microbiol 43 :2435–2440.
Schneider P, Wolters L, Schoone G, Schallig H, Sillekens P, Hermsen R, Sauerwein R, 2005. Real-time nucleic acid sequence-based amplification is more convenient than real-time PCR for quantification of Plasmodium falciparum. J Clin Microbiol 43 :402–405.
Swan H, Sloan L, Muyombwe A, Chavalitshewinkoon-Petmitr P, Krudsood S, Leowattana W, Wilairatana P, Looareesuwan S, Rosenblatt J, 2005. Evaluation of a real-time polymerase chain reaction assay for the diagnosis of malaria in patients from Thailand. Am J Trop Med Hyg 73 :850–854.
Elsayed S, Plewes K, Church D, Chow B, Zhang K, 2006. Use of molecular beacon probes for real-time PCR detection of Plasmodium falciparum and other plasmodium species in peripheral blood specimens. J Clin Microbiol 44 :622–624.
Snounou G, Viriyakosol S, Jarra W, Thaithong S, Brown KN, 1993. Identification of the four human malaria parasite species in field samples by the polymerase chain reaction and detection of a high prevalence of mixed infections. Mol Biochem Parasitol 58 :283–292.
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Jarra W, Snounou G, 1998. Only viable parasites are detectec by PCR following clearance of rodent malarial infections by drug treatment or immune responses. Infect Immun 66 :3783–3787.
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Hii JL, Smith T, Vounatsou P, Alexander N, Mai A, Ibam E, Alpers MP, 2001. Area effects of bednet use in a malaria-endemic area in Papua New Guinea. Trans R Soc Trop Med Hyg 95 :7–13.
Smith T, Hii JL, Genton B, Muller I, Booth M, Gibson N, Narara A, Alpers MP, 2001. Associations of peak shifts in age–prevalence for human malarias with bednet coverage. Trans R Soc Trop Med Hyg 95 :1–6.
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In Papua New Guinea (PNG), complex patterns of malaria commonly include single and mixed infections of Plasmodium falciparum, P. vivax, P. malariae, and P. ovale. Here, we assess recent epidemiologic characteristics of Plasmodium blood-stage infections in the Wosera region through four cross-sectional surveys (August 2001 to June 2003). Whereas previous studies performed here have relied on blood smear/light microscopy (LM) for diagnosing Plasmodium species infections, we introduce a newly developed, post-polymerase chain reaction (PCR), semi-quantitative, ligase detection reaction-fluorescent microsphere assay (LDR-FMA). A direct comparison of the two methods for > 1,100 samples showed that diagnosis was concordant for > 80% of the analyses performed for P. falciparum (PF), P. vivax (PV), and P. malariae (PM). Greater sensitivity of the LDR-FMA accounted for 75% of the discordance between diagnoses. Based on LM, the prevalence of blood-stage PF, PV, and PM infections was found to be markedly reduced compared with an early 1990s survey. In addition, there were significant shifts in age distribution of infections, with PV becoming the most common parasite in children < 4 years of age. Consistent with previous studies, prevalence of all Plasmodium species infections increased significantly in samples analyzed by the PCR-based LDR-FMA. This increase was most pronounced for PM, PO, and mixed infections and in adolescent (10–19 years) and adult age groups, suggesting that LM may lead to under-reported prevalence of less common Plasmodium species, infection complexity, and a skewed distribution of infections towards younger age groups. This study shows that the application of LDR-FMA diagnosis in large epidemiologic studies or malaria control interventions is feasible and may contribute novel insights regarding the epidemiology of malaria.
2000. Papua New Guinea National Health Plan 2001–2010. Port Moresby: Papua New Guinea Ministry of Health.
Peters W, 1960. Studies on the epidemiology of malaria in New Guinea. 1. Holoendemic malaria—a clinical picture. Trans R Soc Trop Med Hyg 54 :242–249.
Peters W, Standfast HA, 1960. Studies on the epidemiology of malaria in New Guinea. 2. Holoendemic malaria—the entomological picture. Trans R Soc Trop Med Hyg 54 :249–254.
Desowitz RS, Saave JJ, 1965. The application of the haemagglutination test to a study of the immunity to malaria in protected and unprotected groups in Australian New Guinea. Bull WHO 32 :149–159.
Cattani JA, Tulloch JL, Vrbova H, Jolley D, Gibson FD, Moir JS, Heywood PF, Alpers MP, Stevenson A, Clancy R, 1986. The epidemiology of malaria in a population surrounding Madang, Papua New Guinea. Am J Trop Med Hyg 35 :3–15.
Desowitz RS, Spark RA, 1987. Malaria in the Maprik area of the Sepik region, Papua New Guinea: 1957–1984. Trans R Soc Trop Med Hyg 81 :175–176.
Cox MJ, Kum DE, Tavul L, Narara A, Raiko A, Baisor M, Alpers MP, Medley GF, Day KP, 1994. Dynamics of malaria parasitaemia associated with febrile illness in children from a rural area of Madang, Papua New Guinea. Trans R Soc Trop Med Hyg 88 :191–197.
Genton B, al-Yaman F, Beck HP, Hii J, Mellor S, Narara A, Gibson N, Smith T, Alpers MP, 1995. The epidemiology of malaria in the Wosera area, East Sepik Province, Papua New Guinea, in preparation for vaccine trials. I. Malariometric indices and immunity. Ann Trop Med Parasitol 89 :359–376.
Genton B, al-Yaman F, Beck HP, Hii J, Mellor S, Rare L, Ginny M, Smith T, Alpers MP, 1995. The epidemiology of malaria in the Wosera area, East Sepik Province, Papua New Guinea, in preparation for vaccine trials. II. Mortality and morbidity. Ann Trop Med Parasitol 89 :377–390.
Shankar AH, Genton B, Semba RD, Baisor M, Paino J, Tamja S, Adiguma T, Wu L, Rare L, Tielsch JM, Alpers MP, West KP Jr, 1999. Effect of vitamin A supplementation on morbidity due to Plasmodium falciparum in young children in Papua New Guinea: A randomised trial. Lancet 354 :203–209.
Bruce MC, Donnelly CA, Alpers MP, Galinski MR, Barnwell JW, Walliker D, Day KP, 2000. Cross-species interactions between malaria parasites in humans. Science 287 :845–848.
Mehlotra RK, Lorry K, Kastens W, Miller SM, Alpers MP, Bockarie M, Kazura JW, Zimmerman PA, 2000. Random distribution of mixed species malaria infections in Papua New Guinea. Am J Trop Med Hyg 62 :225–231.
Mehlotra RK, Kasehagen LJ, Baisor M, Lorry K, Kazura JW, Bockarie MJ, Zimmerman PA, 2002. Malaria infections are randomly distributed in diverse holoendemic areas of Papua New Guinea. Am J Trop Med Hyg 67 :555–562.
Mueller I, Bjorge S, Poigeno G, Kundi J, Tandrapah T, Riley ID, Reeder JC, 2003. The epidemiology of malaria in the Papua New Guinea highlands: 2. Eastern Highlands Province. P N G Med J 46 :166–179.
Mueller I, Taime J, Ivivi R, Yala S, Bjorge S, Riley ID, Reeder JC, 2003. The epidemiology of malaria in the Papua New Guinea highlands: 1. Western Highlands Province. P N G Med J 46 :16–31.
Mueller I, Namuigi P, Kundi J, Ivivi R, Tandrapah T, Bjorge S, Reeder JC, 2005. Epidemic malaria in the highlands of Papua New Guinea. Am J Trop Med Hyg 72 :554–560.
Brabin BJ, Ginny M, Alpers M, Brabin L, Eggelte T, Van der Kaay HJ, 1990. Failure of chloroquine prophylaxis for falciparum malaria in pregnant women in Madang, Papua New Guinea. Ann Trop Med Parasitol 84 :1–9.
al-Yaman F, Genton B, Mokela D, Narara A, Raiko A, Alpers MP, 1996. Resistance of Plasmodium falciparum malaria to amodiaquine, chloroquine and quinine in the Madang Province of Papua New Guinea. P N G Med J 39 :16–22.
Genton B, Anders RF, Alpers MP, Reeder JC, 2003. The malaria vaccine development program in Papua New Guinea. Trends Parasitol 19 :264–270.
Booth PB, Tills D, Warlow A, Kopec AC, Mourant AE, Teesdale P, Hornabrook RW, 1982. Red cell antigen, serum protein and red cell enzyme polymorphisms in Karkar Islanders and inhabitants of the adjacent North Coast of New Guinea. Hum Hered 32 :385–403.
Mourant AE, Tills D, Kopec AC, Warlow A, Teesdale P, Booth PB, Hornabrook RW, 1982. Red cell antigen, serum protein and red cell enzyme polymorphisms in Eastern Highlanders of New Guinea. Hum Hered 32 :374–384.
Brabin L, Brabin BJ, 1990. Malaria and glucose 6-phosphate de-hydrogenase deficiency in populations with high and low spleen rates in Madang, Papua New Guinea. Hum Hered 40 :15–21.
Genton B, al-Yaman F, Mgone CS, Alexander N, Paniu MM, Alpers MP, Mokela D, 1995. Ovalocytosis and cerebral malaria. Nature 378 :564–565.
Allen SJ, O’Donnell A, Alexander ND, Mgone CS, Peto TE, Clegg JB, Alpers MP, Weatherall DJ, 1999. Prevention of cerebral malaria in children in Papua New Guinea by southeast Asian ovalocytosis band 3. Am J Trop Med Hyg 60 :1056–1060.
Zimmerman PA, Woolley I, Masinde GL, Miller SM, McNamara DT, Hazlett F, Mgone CS, Alpers MP, Genton B, Boatin BA, Kazura JW, 1999. Emergence of Fy*A(null) in a Plasmodium vivax-endemic region of Papua New Guinea. Proc Natl Acad Sci USA 96 :13973–13977.
Patel SS, Mehlotra RK, Kastens W, Mgone CS, Kazura JW, Zimmerman PA, 2001. The association of the glycophorin C exon 3 deletion with ovalocytosis and malaria susceptibility in the Wosera, Papua New Guinea. Blood 98 :3489–3491.
Maier AG, Duraisingh MT, Reeder JC, Patel SS, Kazura JW, Zimmerman PA, Cowman AF, 2003. Plasmodium falciparum erythrocyte invasion through glycophorin C and selection for Gerbich negativity in human populations. Nat Med 9 :87–92.
Patel SS, King CL, Mgone CS, Kazura JW, Zimmerman PA, 2004. Glycophorin C (Gerbich antigen blood group) and band 3 polymorphisms in two malaria holoendemic regions of Papua New Guinea. Am J Hematol 75 :1–5.
al-Yaman F, Genton B, Mokela D, Narara A, Raiko A, Alpers MP, 1996. Resistance of Plasmodium falciparum malaria to amodiaquine, chloroquine and quinine in the Madang Province of Papua New Guinea, 1990–1993. P N G Med J 39 :16–22.
Muller I, Bockarie M, Alpers M, Smith T, 2003. The epidemiology of malaria in Papua New Guinea. Trends Parasitol 19 :253–259.
Mehlotra RK, Mattera G, Bhatia K, Reeder JC, Stoneking M, Zimmerman PA, 2005. Insight into the early spread of chloroquine-resistant Plasmodium falciparum infections in Papua New Guinea. J Infect Dis 192 :2174–2179.
Bruce MC, Galinski MR, Barnwell JW, Donnelly CA, Walmsley M, Alpers MP, Walliker D, Day KP, 2000. Genetic diversity and dynamics of plasmodium falciparum and P. vivax populations in multiply infected children with asymptomatic malaria infections in Papua New Guinea. Parasitology 121 :257–272.
Mueller I, Taime J, Ibam E, Kundi J, Lagog M, Bockarie M, Reeder JC, 2002. Complex patterns of malaria epidemiology in the highlands region of Papua New Guinea. P N G Med J 45 :200–205.
McNamara DT, Kasehagen LJ, Grimberg BT, Cole-Tobian J, Collins WE, Zimmerman PA, 2006. Diagnosing infection levels of four human malaria parasite species by a polymerase chain reaction/ligase detection reaction fluorescent microsphere-based assay. Am J Trop Med Hyg 74 :413–421.
Hii JL, Smith T, Mai A, Mellor S, Lewis D, Alexander N, Alpers MP, 1997. Spatial and temporal variation in abundance of Anopheles (Diptera:Culicidae) in a malaria endemic area in Papua New Guinea. J Med Entomol 34 :193–205.
Hii JL, Smith T, Mai A, Ibam E, Alpers MP, 2000. Comparison between anopheline mosquitoes (Diptera: Culicidae) caught using different methods in a malaria endemic area of Papua New Guinea. Bull Entomol Res 90 :211–219.
McNamara DT, Thomson JM, Kasehagen LJ, Zimmerman PA, 2004. Development of a multiplex PCR-ligase detection reaction assay for diagnosis of infection by the four parasite species causing malaria in humans. J Clin Microbiol 42 :2403–2410.
Zimmerman PA, Buckler-White A, Alkhatib G, Spalding T, Kubofcik J, Combadiere C, Weissman D, Cohen O, Rubbert A, Lam G, Vaccarezza M, Kennedy PE, Kumaraswami V, Giorgi JV, Detels R, Hunter J, Chopek M, Berger EA, Fauci AS, Nutman TB, Murphy PM, 1997. Inherited resistance to HIV-1 conferred by an inactivating mutation in CC Chemokine Receptor 5: Studies in populations with contrasting clinical phenotypes, defined racial background, and quantified risk. Mol Med 3 :23–36.
Ross R, 1910. The measurement of malaria (section 31). Ross R, ed. The Prevention of Malaria. New York: E.P. Dutton & Company, 217–246.
Knowles R, White RS, 1930. Studies in the parasitology of malaria. Indian Medical Research Memoirs 18 :436.
2000. WHO/MAL/2000.1091 New Perspectives in Malaria Diagnosis. Geneva: World Health Organization.
Ohrt C, Purnomo, Sutamihardja MA, Tang D, Kain KC, 2002. Impact of microscopy error on estimates of protective efficacy in malaria-prevention trials. J Infect Dis 186 :540–546.
McKenzie FE, Sirichaisinthop J, Miller RS, Gasser RA Jr, Wongsrichanalai C, 2003. Dependence of malaria detection and species diagnosis by microscopy on parasite density. Am J Trop Med Hyg 69 :372–376.
O’Meara WP, McKenzie FE, Magill AJ, Forney JR, Permpanich B, Lucas C, Gasser RA Jr, Wongsrichanalai C, 2005. Sources of variability in determining malaria parasite density by microscopy. Am J Trop Med Hyg 73 :593–598.
Prudhomme O’meara W, Remich S, Ogutu B, Lucas M, Mtalib R, Obare P, Oloo F, Onoka C, Osoga J, Ohrt C, McKenzie FE, 2006. Systematic comparison of two methods to measure parasite density from malaria blood smears. Parasitol Res.
Mayxay M, Pukrittayakamee S, Newton PN, White NJ, 2004. Mixed-species malaria infections in humans. Trends Parasitol 20 :233–240.
Lee MA, Tan CH, Aw LT, Tang CS, Singh M, Lee SH, Chia HP, Yap EP, 2002. Real-time fluorescence-based PCR for detection of malaria parasites. J Clin Microbiol 40 :4343–4345.
Perandin F, Manca N, Calderaro A, Piccolo G, Galati L, Ricci L, Medici MC, Arcangeletti MC, Snounou G, Dettori G, Chezzi C, 2004. Development of a real-time PCR assay for detection of Plasmodium falciparum, Plasmodium vivax, and Plasmodium ovale for routine clinical diagnosis. J Clin Microbiol 42 :1214–1219.
Rougemont M, Van Saanen M, Sahli R, Hinrikson HP, Bille J, Jaton 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.
Mangold KA, Manson RU, Koay ES, Stephens L, Regner M, Thomson RB Jr, Peterson LR, Kaul KL, 2005. Real-time PCR for detection and identification of Plasmodium spp. J Clin Microbiol 43 :2435–2440.
Schneider P, Wolters L, Schoone G, Schallig H, Sillekens P, Hermsen R, Sauerwein R, 2005. Real-time nucleic acid sequence-based amplification is more convenient than real-time PCR for quantification of Plasmodium falciparum. J Clin Microbiol 43 :402–405.
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Elsayed S, Plewes K, Church D, Chow B, Zhang K, 2006. Use of molecular beacon probes for real-time PCR detection of Plasmodium falciparum and other plasmodium species in peripheral blood specimens. J Clin Microbiol 44 :622–624.
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