Main Article Content
Abstract
RÉSUMÉ
Introduction. Malgré les efforts fournis depuis environ deux décennies en matière de lutte, le paludisme reste un problème de santé publique en République du Congo. La présente étude a pour objectif d’analyser l’infection palustre dans les ménages d’une zone rurale des environs de Brazzaville. Matériel et Méthodes. Des prélèvements sanguins ont été réalisés chez les personnes de tout âge au sein des ménages du village Djoumouna, en saison des pluies et en saison sèche, pour une détection des parasites du paludisme par goutte épaisse et une détermination des espèces par frottis sanguin. La relation entre la proportion des infections palustres et plusieurs paramètres a été évaluée. Résultats. Des proportions des infections symptomatiques et asymptomatiques allant de 50-52% et de 34-44% respectivement ont été trouvées. La plupart des infections palustres symptomatique et asymptomatique ont été enregistrées chez les enfants de 5-15 ans avec 59,6% et 67,3% respectivement en saison des pluies et en saison sèche (P-value=0,01). La mono-infection à Plasmodium falciparum a été plus prédominante tant en saison des pluies (83,19%) qu’en saison sèche (75,94%), suivi des cas des infections mixtes de Plasmodium falciparum et Plasmodium malariae (10,62% saison de pluies et 11,28 % saison sèche). Conclusion. L’infection palustre continue à sévir à des taux élevés dans les villages des environs de Brazzaville. Les proportions élevées enregistrées chez les enfants d’âges scolaires et les adultes montrent que le profil épidémiologique du paludisme tend à être inversé.
ABSTRACT
Introduction. Despite the efforts made over the past two decades in term of control, malaria remains a public health problem in the Republic of Congo. The objective of this study is to analyze plasmodial infection in households in a rural area near Brazzaville. Material and Methods. Blood samples were taken from people living in households in the rural community of Djoumouna during the rainy and dry seasons for the detection of malaria parasites and determination of malaria species by thick and thin blood smear respectively. The relationship between the proportion of plasmodial infections and several parameters was evaluated. Results. Proportions of symptomatic and asymptomatic infections ranging from 50-52% and 34-44% respectively were recorded. Symptomatic and asymptomatic plasmodial infections were mostly recorded in children aged between 5 to15 years old, with 59.6% and 67.3% respectively during the rainy and dry seasons (P-value=0.01). Plasmodium falciparum mono-infection being most predominant during both rainy (83.19%) and dry seasons (75.94%), followed by the mixed infections of Plasmodium falciparum and Plasmodium malariae (10.62% during rainy season and 11.28% during dry season. Conclusion. Malaria infection continues to occur at high rates in villages around Brazzaville. The high prevalence recorded in school-aged children and adults show that the epidemiological profile of malaria tends to be reversed.
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Article Details
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References
- WHO. World malaria report 2020. WHO: Geneva, Switzerland, 2020.
- Gnanguenon V, Govoetchan R, Agossa FR, Ossè R, Oke-Agbo F, Azondekon R, et al. Transmission patterns of Plasmodium falciparum by Anopheles gambiae in Benin. Malaria journal 2014;13(1):1–14.
- Cowman AF, Healer J, Marapana D, Marsh K. Malaria: biology and disease. Cell 2016;167(3):610–624.
- Mwakalinga VM, Sartorius BK, Mlacha YP, Msellemu DF, Limwagu AJ, Mageni ZD, et al. Spatially aggregated clusters and scattered smaller loci of elevated malaria vector density and human infection prevalence in urban Dar es Salaam, Tanzania. Malaria journal 2016;15(1):1–11.
- Rek J, Katrak S, Obasi H, Nayebare P, Katureebe A, Kakande E, et al. Characterizing microscopic and submicroscopic malaria parasitaemia at three sites with varied transmission intensity in Uganda. Malaria journal 2016;15(1):1–8.
- Kibret S, Lautze J, McCartney M, Nhamo L, Yan G. Malaria around large dams in Africa: effect of environmental and transmission endemicity factors. Malaria journal 2019;18(1):1–12.
- Caputo A, Garavelli PL. Climate, environment and transmission of malaria. Infez Med 2016;2:93–104.
- Diallo A, Sié A, Sirima S, Sylla K, Ndiaye M, Bountogo M, et al. An epidemiological study to assess Plasmodium falciparum parasite prevalence and malaria control measures in Burkina Faso and Senegal. Malaria journal 2017;16(1):1–12.
- Ouedraogo B, Inoue Y, Kambiré A, Sallah K, Dieng S, Tine R, et al. Spatio-temporal dynamic of malaria in Ouagadougou, Burkina Faso, 2011–2015. Malaria journal 2018;17(1):1–12.
- Trape J-F, Zoulani A. Malaria and urbanization in central Africa: the example of Brazzaville. Part III: Relationships between urbanization and the intensity of malaria transmission. Transactions of the Royal Society of Tropical Medicine and Hygiene 1987;81(Supplement_2):19–25.
- Ndounga M, Casimiro PN, Miakassissa-Mpassi V, Loumouamou D, Ntoumi F, Basco LK. Le paludisme dans deux centres de santé au sud de Brazzaville, Congo. Bull Soc Pathol Exot 2008;101(4):329–335.
- Mayengue PI, Batsimba DK, Niama RF, Ottia RI, Malonga-Massanga A, Fila-Fila GPU, et al. Variation of prevalence of malaria, parasite density and the multiplicity of Plasmodium falciparum infection throughout the year at three different health centers in Brazzaville, Republic of Congo. BMC infectious diseases 2020;20(1):1–10.
- Mayengue PI, Kouhounina Batsimba D, Dossou-Yovo LR, Niama RF, Macosso L, Pembet Singana B, et al. Evaluation of routine microscopy performance for malaria diagnosis at three different health centers in Brazzaville, Republic of Congo. Malaria research and treatment 2018;2018.
- PNLP. Rapport sur le paludisme. Ministère de la Santé et de la Population: Brazzaville, Congo, 2016.
- Koukouikila-Koussounda F, Ntoumi F. Malaria epidemiological research in the Republic of Congo. Malaria journal 2016;15(1):1–11.
- Ndounga M, Tahar R, Casimiro PN, Loumouamou D, Basco LK. Clinical efficacy of artemether-lumefantrine in Congolese children with acute uncomplicated falciparum malaria in Brazzaville. Malaria research and treatment 2012;2012.
- Ndounga M, Mayengue PI, Casimiro PN, Loumouamou D, Basco LK, Ntoumi F, et al. Artesunate-amodiaquine efficacy in Congolese children with acute uncomplicated falciparum malaria in Brazzaville. Malaria journal 2013;12(1):1–8.
- Etoka-Beka MK, Ntoumi F, Kombo M, Deibert J, Poulain P, Vouvoungui C, et al. PLASMODIUM FALCIPARUM INFECTION IN FEBRILE CONGOLESE CHILDREN: PREVALENCE OF CLINICAL MALARIA TEN YEARS AFTER INTRODUCTION OF ARTEMISININ-COMBINATION THERAPIES. BMJ Global Health 2017;2(Suppl 2).
- Singana BP, Bogreau H, Matondo BD, Dossou-Yovo LR, Casimiro PN, Mbouka R, et al. Malaria burden and anti-malarial drug efficacy in Owando, northern Congo. Malaria journal 2016;15(1):1–10.
- Singana BP, Mayengue PI, Niama RF, Ndounga M. Genetic diversity of Plasmodium falciparum infection among children with uncomplicated malaria living in Pointe-Noire, Republic of Congo. The Pan African Medical Journal 2019;32.
- Autino B, Noris A, Russo R, Castelli F. Epidemiology of malaria in endemic areas. Mediterranean journal of hematology and infectious diseases 2012;4(1).
- Cohee LM, Laufer MK. Malaria in children. Pediatric Clinics of North America 2017;64(4):851.
- Carnevale P. Le paludisme dans un village des environs de Brazzaville, République populaire du Congo. 1979.
- Carnevale P, Bosseno M-F, Zoulani A, Michel R, Molez J-F. La dynamique de la transmission du paludisme humain en zone de savane herbeuse et de forêt dégradée des environs nord et sud de Brazzaville RP du Congo. Cahiers-ORSTOM Entomologie médicale et parasitologie 1985;23(2):95–115.
- Miabangana ES, Lubini Ayingweu C, Malaisse F. Analyse floristique et phytogéographique de la forêt de la Djoumouna (République du Congo). Geo-Eco-Trop: Revue Internationale de Géologie, de Géographie et d’Écologie Tropicales 2016;40(2):175–190.
- Miabangana ES. Structure, composition et diversité floristique de la forêt de Djoumouna (République du Congo). European Scientific Journal 2020;:179–203.
- OMS. Technique de base pour le diagnostic microscopique du paludisme : Partie I guide du stagiaire. Techniques de base pour le diagnostic microscopique du paludismeGénéve, Suisse 2014;:90.
- Organisation mondiale de la Santé. Terminologie OMS du paludisme. Organisation mondiale de la Santé: Geneva, Switzerland, 2017.
- PNLP. Rapport sur le paludisme. Ministère de la Santé et de la Population: Brazzaville, Congo, 2014.
- PNLP. politique National de lutte contre le paludisme. Ministère de la Santé et de la Population: Brazzaville, Congo, 2006.
- Mbongo JA, Bowassa GE, Gombet CK, Iloki LH. Paludisme congénital au centre Hospitalier et Universitaire de Brazzaville: une étude Epidémiologique de 90 cas. HEALTH SCIENCES AND DISEASE 2015;16(4).
- Talani P, Samba G, Moyen G. Prise en charge des fièvres de l’enfant à domicile dans le district rural de Boko (Congo-Brazzaville). Santé publique 2003;15(4):485–490.
- Elbadry MA, Al-Khedery B, Tagliamonte MS, Yowell CA, Raccurt CP, Existe A, et al. High prevalence of asymptomatic malaria infections: a cross-sectional study in rural areas in six departments in Haiti. Malaria journal 2015;14(1):1–9.
- Laishram DD, Sutton PL, Nanda N, Sharma VL, Sobti RC, Carlton JM, et al. The complexities of malaria disease manifestations with a focus on asymptomatic malaria. Malaria journal 2012;11(1):1–15.
- Owusu ED, Buabeng V, Dadzie S, Brown CA, Grobusch MP, Mens P. Characteristics of asymptomatic Plasmodium spp. parasitaemia in Kwahu-Mpraeso, a malaria endemic mountainous district in Ghana, West Africa. Malaria journal 2016;15(1):1–10.
- Kateera F, Mens PF, Hakizimana E, Ingabire CM, Muragijemariya L, Karinda P, et al. Malaria parasite carriage and risk determinants in a rural population: a malariometric survey in Rwanda. Malaria journal 2015;14(1):1–11.
- Starzengruber P, Fuehrer H-P, Ley B, Thriemer K, Swoboda P, Habler VE, et al. High prevalence of asymptomatic malaria in south-eastern Bangladesh. Malaria journal 2014;13(1):1–10.
- Lindblade KA, Steinhardt L, Samuels A, Kachur SP, Slutsker L. The silent threat: asymptomatic parasitemia and malaria transmission. Expert review of anti-infective therapy 2013;11(6):623–639.
- Dal-Bianco MP, Koster KB, Kombila UD, Kun JF, Grobusch MP, Ngoma GM, et al. High prevalence of asymptomatic Plasmodium falciparum infection in Gabonese adults. American Journal of Tropical Medicine and Hygiene 2007;77(5):939–942.
- Olusegun-Joseph TS, Oboh MA, Godwin O, Ovioma GO, Fagbohun IK, Okorafor U, et al. Differential prevalence of malaria infection in rural and urban out-patient clinics in Lagos state, Nigeria. Pan Afr J Life Sci 2019;2:79–84.
- Carnevale P, Bosseno M-F, Zoulani A, Michel R, Molez J-F. La dynamique de la transmission du paludisme humain en zone de savane herbeuse et de forêt dégradée des environs nord et sud de Brazzaville, RP du Congo w. Cah ORSTOM 1985;XXIII(2):95–115.
- Etoka-Beka MK, Ntoumi F, Kombo M, Deibert J, Poulain P, Vouvoungui C, et al. Plasmodium falciparum infection in febrile Congolese children: prevalence of clinical malaria 10 years after introduction of artemisinin-combination therapies. Tropical Medicine & International Health 2016;21(12):1496–1503.
- Koukouikila-Koussounda F, Malonga V, Mayengue PI, Ndounga M, Vouvoungui CJ, Ntoumi F. Genetic polymorphism of merozoite surface protein 2 and prevalence of K76T pfcrt mutation in Plasmodium falciparum field isolates from Congolese children with asymptomatic infections. Malaria Journal 2012;11(1):1–7.
- Walldorf JA, Cohee LM, Coalson JE, Bauleni A, Nkanaunena K, Kapito-Tembo A, et al. School-age children are a reservoir of malaria infection in Malawi. PloS one 2015;10(7):e0134061.
- Gbalégba CG, Ba H, Silué KD, Ba O, Tia E, Chouaibou M, et al. Distribution of Plasmodium spp. infection in asymptomatic carriers in perennial and low seasonal malaria transmission settings in West Africa. Infectious diseases of poverty 2018;7(1):1–13.
- Zhao Y, Zeng J, Zhao Y, Liu Q, He Y, Zhang J, et al. Risk factors for asymptomatic malaria infections from seasonal cross-sectional surveys along the China–Myanmar border. Malaria journal 2018;17(1):1–13.
- Walldorf JA, Cohee LM, Coalson JE, Bauleni A, Nkanaunena K, Kapito-Tembo A, et al. School-age children are a reservoir of malaria infection in Malawi. PloS one 2015;10(7):e0134061.
- Zaw MT, Thant M, Hlaing TM, Aung NZ, Thu M, Phumchuea K, et al. Asymptomatic and sub-microscopic malaria infection in Kayah State, eastern Myanmar. Malaria journal 2017;16(1):1–7.
- Monroe A, Asamoah O, Lam Y, Koenker H, Psychas P, Lynch M, et al. Outdoor-sleeping and other night-time activities in northern Ghana: implications for residual transmission and malaria prevention. Malaria journal 2015;14(1):1–12.
- Noland GS, Graves PM, Sallau A, Eigege A, Emukah E, Patterson AE, et al. Malaria prevalence, anemia and baseline intervention coverage prior to mass net distributions in Abia and Plateau States, Nigeria. BMC Infectious Diseases 2014;14(1):1–13.
- Gimnig JE, Otieno P, Were V, Marwanga D, Abong’o D, Wiegand R, et al. The effect of indoor residual spraying on the prevalence of malaria parasite infection, clinical malaria and anemia in an area of perennial transmission and moderate coverage of insecticide treated nets in Western Kenya. PloS one 2016;11(1):e0145282.
- Drakeley C, Abdulla S, Agnandji ST, Fernandes JF, Kremsner P, Lell B, et al. Longitudinal estimation of Plasmodium falciparum prevalence in relation to malaria prevention measures in six sub-Saharan African countries. Malaria journal 2017;16(1):1–15.
- Nianga Bikouta G O, T, Bitsindou P, Lenga A. Impact of the use of mosquito nets on malaria transmission in Djoumouna (Brazzaville-Congo). Int J Adv Res 2019;7(8):285–294.
- Ayele DG, Zewotir TT, Mwambi HG. Prevalence and risk factors of malaria in Ethiopia. Malaria Journal 2012;11(1):1–9.
References
WHO. World malaria report 2020. WHO: Geneva, Switzerland, 2020.
Gnanguenon V, Govoetchan R, Agossa FR, Ossè R, Oke-Agbo F, Azondekon R, et al. Transmission patterns of Plasmodium falciparum by Anopheles gambiae in Benin. Malaria journal 2014;13(1):1–14.
Cowman AF, Healer J, Marapana D, Marsh K. Malaria: biology and disease. Cell 2016;167(3):610–624.
Mwakalinga VM, Sartorius BK, Mlacha YP, Msellemu DF, Limwagu AJ, Mageni ZD, et al. Spatially aggregated clusters and scattered smaller loci of elevated malaria vector density and human infection prevalence in urban Dar es Salaam, Tanzania. Malaria journal 2016;15(1):1–11.
Rek J, Katrak S, Obasi H, Nayebare P, Katureebe A, Kakande E, et al. Characterizing microscopic and submicroscopic malaria parasitaemia at three sites with varied transmission intensity in Uganda. Malaria journal 2016;15(1):1–8.
Kibret S, Lautze J, McCartney M, Nhamo L, Yan G. Malaria around large dams in Africa: effect of environmental and transmission endemicity factors. Malaria journal 2019;18(1):1–12.
Caputo A, Garavelli PL. Climate, environment and transmission of malaria. Infez Med 2016;2:93–104.
Diallo A, Sié A, Sirima S, Sylla K, Ndiaye M, Bountogo M, et al. An epidemiological study to assess Plasmodium falciparum parasite prevalence and malaria control measures in Burkina Faso and Senegal. Malaria journal 2017;16(1):1–12.
Ouedraogo B, Inoue Y, Kambiré A, Sallah K, Dieng S, Tine R, et al. Spatio-temporal dynamic of malaria in Ouagadougou, Burkina Faso, 2011–2015. Malaria journal 2018;17(1):1–12.
Trape J-F, Zoulani A. Malaria and urbanization in central Africa: the example of Brazzaville. Part III: Relationships between urbanization and the intensity of malaria transmission. Transactions of the Royal Society of Tropical Medicine and Hygiene 1987;81(Supplement_2):19–25.
Ndounga M, Casimiro PN, Miakassissa-Mpassi V, Loumouamou D, Ntoumi F, Basco LK. Le paludisme dans deux centres de santé au sud de Brazzaville, Congo. Bull Soc Pathol Exot 2008;101(4):329–335.
Mayengue PI, Batsimba DK, Niama RF, Ottia RI, Malonga-Massanga A, Fila-Fila GPU, et al. Variation of prevalence of malaria, parasite density and the multiplicity of Plasmodium falciparum infection throughout the year at three different health centers in Brazzaville, Republic of Congo. BMC infectious diseases 2020;20(1):1–10.
Mayengue PI, Kouhounina Batsimba D, Dossou-Yovo LR, Niama RF, Macosso L, Pembet Singana B, et al. Evaluation of routine microscopy performance for malaria diagnosis at three different health centers in Brazzaville, Republic of Congo. Malaria research and treatment 2018;2018.
PNLP. Rapport sur le paludisme. Ministère de la Santé et de la Population: Brazzaville, Congo, 2016.
Koukouikila-Koussounda F, Ntoumi F. Malaria epidemiological research in the Republic of Congo. Malaria journal 2016;15(1):1–11.
Ndounga M, Tahar R, Casimiro PN, Loumouamou D, Basco LK. Clinical efficacy of artemether-lumefantrine in Congolese children with acute uncomplicated falciparum malaria in Brazzaville. Malaria research and treatment 2012;2012.
Ndounga M, Mayengue PI, Casimiro PN, Loumouamou D, Basco LK, Ntoumi F, et al. Artesunate-amodiaquine efficacy in Congolese children with acute uncomplicated falciparum malaria in Brazzaville. Malaria journal 2013;12(1):1–8.
Etoka-Beka MK, Ntoumi F, Kombo M, Deibert J, Poulain P, Vouvoungui C, et al. PLASMODIUM FALCIPARUM INFECTION IN FEBRILE CONGOLESE CHILDREN: PREVALENCE OF CLINICAL MALARIA TEN YEARS AFTER INTRODUCTION OF ARTEMISININ-COMBINATION THERAPIES. BMJ Global Health 2017;2(Suppl 2).
Singana BP, Bogreau H, Matondo BD, Dossou-Yovo LR, Casimiro PN, Mbouka R, et al. Malaria burden and anti-malarial drug efficacy in Owando, northern Congo. Malaria journal 2016;15(1):1–10.
Singana BP, Mayengue PI, Niama RF, Ndounga M. Genetic diversity of Plasmodium falciparum infection among children with uncomplicated malaria living in Pointe-Noire, Republic of Congo. The Pan African Medical Journal 2019;32.
Autino B, Noris A, Russo R, Castelli F. Epidemiology of malaria in endemic areas. Mediterranean journal of hematology and infectious diseases 2012;4(1).
Cohee LM, Laufer MK. Malaria in children. Pediatric Clinics of North America 2017;64(4):851.
Carnevale P. Le paludisme dans un village des environs de Brazzaville, République populaire du Congo. 1979.
Carnevale P, Bosseno M-F, Zoulani A, Michel R, Molez J-F. La dynamique de la transmission du paludisme humain en zone de savane herbeuse et de forêt dégradée des environs nord et sud de Brazzaville RP du Congo. Cahiers-ORSTOM Entomologie médicale et parasitologie 1985;23(2):95–115.
Miabangana ES, Lubini Ayingweu C, Malaisse F. Analyse floristique et phytogéographique de la forêt de la Djoumouna (République du Congo). Geo-Eco-Trop: Revue Internationale de Géologie, de Géographie et d’Écologie Tropicales 2016;40(2):175–190.
Miabangana ES. Structure, composition et diversité floristique de la forêt de Djoumouna (République du Congo). European Scientific Journal 2020;:179–203.
OMS. Technique de base pour le diagnostic microscopique du paludisme : Partie I guide du stagiaire. Techniques de base pour le diagnostic microscopique du paludismeGénéve, Suisse 2014;:90.
Organisation mondiale de la Santé. Terminologie OMS du paludisme. Organisation mondiale de la Santé: Geneva, Switzerland, 2017.
PNLP. Rapport sur le paludisme. Ministère de la Santé et de la Population: Brazzaville, Congo, 2014.
PNLP. politique National de lutte contre le paludisme. Ministère de la Santé et de la Population: Brazzaville, Congo, 2006.
Mbongo JA, Bowassa GE, Gombet CK, Iloki LH. Paludisme congénital au centre Hospitalier et Universitaire de Brazzaville: une étude Epidémiologique de 90 cas. HEALTH SCIENCES AND DISEASE 2015;16(4).
Talani P, Samba G, Moyen G. Prise en charge des fièvres de l’enfant à domicile dans le district rural de Boko (Congo-Brazzaville). Santé publique 2003;15(4):485–490.
Elbadry MA, Al-Khedery B, Tagliamonte MS, Yowell CA, Raccurt CP, Existe A, et al. High prevalence of asymptomatic malaria infections: a cross-sectional study in rural areas in six departments in Haiti. Malaria journal 2015;14(1):1–9.
Laishram DD, Sutton PL, Nanda N, Sharma VL, Sobti RC, Carlton JM, et al. The complexities of malaria disease manifestations with a focus on asymptomatic malaria. Malaria journal 2012;11(1):1–15.
Owusu ED, Buabeng V, Dadzie S, Brown CA, Grobusch MP, Mens P. Characteristics of asymptomatic Plasmodium spp. parasitaemia in Kwahu-Mpraeso, a malaria endemic mountainous district in Ghana, West Africa. Malaria journal 2016;15(1):1–10.
Kateera F, Mens PF, Hakizimana E, Ingabire CM, Muragijemariya L, Karinda P, et al. Malaria parasite carriage and risk determinants in a rural population: a malariometric survey in Rwanda. Malaria journal 2015;14(1):1–11.
Starzengruber P, Fuehrer H-P, Ley B, Thriemer K, Swoboda P, Habler VE, et al. High prevalence of asymptomatic malaria in south-eastern Bangladesh. Malaria journal 2014;13(1):1–10.
Lindblade KA, Steinhardt L, Samuels A, Kachur SP, Slutsker L. The silent threat: asymptomatic parasitemia and malaria transmission. Expert review of anti-infective therapy 2013;11(6):623–639.
Dal-Bianco MP, Koster KB, Kombila UD, Kun JF, Grobusch MP, Ngoma GM, et al. High prevalence of asymptomatic Plasmodium falciparum infection in Gabonese adults. American Journal of Tropical Medicine and Hygiene 2007;77(5):939–942.
Olusegun-Joseph TS, Oboh MA, Godwin O, Ovioma GO, Fagbohun IK, Okorafor U, et al. Differential prevalence of malaria infection in rural and urban out-patient clinics in Lagos state, Nigeria. Pan Afr J Life Sci 2019;2:79–84.
Carnevale P, Bosseno M-F, Zoulani A, Michel R, Molez J-F. La dynamique de la transmission du paludisme humain en zone de savane herbeuse et de forêt dégradée des environs nord et sud de Brazzaville, RP du Congo w. Cah ORSTOM 1985;XXIII(2):95–115.
Etoka-Beka MK, Ntoumi F, Kombo M, Deibert J, Poulain P, Vouvoungui C, et al. Plasmodium falciparum infection in febrile Congolese children: prevalence of clinical malaria 10 years after introduction of artemisinin-combination therapies. Tropical Medicine & International Health 2016;21(12):1496–1503.
Koukouikila-Koussounda F, Malonga V, Mayengue PI, Ndounga M, Vouvoungui CJ, Ntoumi F. Genetic polymorphism of merozoite surface protein 2 and prevalence of K76T pfcrt mutation in Plasmodium falciparum field isolates from Congolese children with asymptomatic infections. Malaria Journal 2012;11(1):1–7.
Walldorf JA, Cohee LM, Coalson JE, Bauleni A, Nkanaunena K, Kapito-Tembo A, et al. School-age children are a reservoir of malaria infection in Malawi. PloS one 2015;10(7):e0134061.
Gbalégba CG, Ba H, Silué KD, Ba O, Tia E, Chouaibou M, et al. Distribution of Plasmodium spp. infection in asymptomatic carriers in perennial and low seasonal malaria transmission settings in West Africa. Infectious diseases of poverty 2018;7(1):1–13.
Zhao Y, Zeng J, Zhao Y, Liu Q, He Y, Zhang J, et al. Risk factors for asymptomatic malaria infections from seasonal cross-sectional surveys along the China–Myanmar border. Malaria journal 2018;17(1):1–13.
Walldorf JA, Cohee LM, Coalson JE, Bauleni A, Nkanaunena K, Kapito-Tembo A, et al. School-age children are a reservoir of malaria infection in Malawi. PloS one 2015;10(7):e0134061.
Zaw MT, Thant M, Hlaing TM, Aung NZ, Thu M, Phumchuea K, et al. Asymptomatic and sub-microscopic malaria infection in Kayah State, eastern Myanmar. Malaria journal 2017;16(1):1–7.
Monroe A, Asamoah O, Lam Y, Koenker H, Psychas P, Lynch M, et al. Outdoor-sleeping and other night-time activities in northern Ghana: implications for residual transmission and malaria prevention. Malaria journal 2015;14(1):1–12.
Noland GS, Graves PM, Sallau A, Eigege A, Emukah E, Patterson AE, et al. Malaria prevalence, anemia and baseline intervention coverage prior to mass net distributions in Abia and Plateau States, Nigeria. BMC Infectious Diseases 2014;14(1):1–13.
Gimnig JE, Otieno P, Were V, Marwanga D, Abong’o D, Wiegand R, et al. The effect of indoor residual spraying on the prevalence of malaria parasite infection, clinical malaria and anemia in an area of perennial transmission and moderate coverage of insecticide treated nets in Western Kenya. PloS one 2016;11(1):e0145282.
Drakeley C, Abdulla S, Agnandji ST, Fernandes JF, Kremsner P, Lell B, et al. Longitudinal estimation of Plasmodium falciparum prevalence in relation to malaria prevention measures in six sub-Saharan African countries. Malaria journal 2017;16(1):1–15.
Nianga Bikouta G O, T, Bitsindou P, Lenga A. Impact of the use of mosquito nets on malaria transmission in Djoumouna (Brazzaville-Congo). Int J Adv Res 2019;7(8):285–294.
Ayele DG, Zewotir TT, Mwambi HG. Prevalence and risk factors of malaria in Ethiopia. Malaria Journal 2012;11(1):1–9.