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Ndong Ngomo JM, Mawili-Mboumba DP, M’Bondoukwé NP, Ditombi BM, Koumba Lengongo JV, Batchy Ognagosso FB, Bouyou-Akotet MK. Drug Resistance Molecular Markers of Plasmodium falciparum and Severity of Malaria in Febrile Children in the Sentinel Site for Malaria Surveillance of Melen in Gabon: Additional Data from the Plasmodium Diversity Network African Network. Trop Med Infect Dis 2023; 8:184. [PMID: 37104310 PMCID: PMC10147079 DOI: 10.3390/tropicalmed8040184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 04/28/2023] Open
Abstract
The objective of this study was to analyze the relationship between the frequency of artemisinin-based combination (ACT) drug resistance molecular markers and clinical forms of P. falciparum malaria and parasitemia. A cross-sectional study was carried out between January and April 2014 at the Operational Clinical Research Unit of Melen in febrile children aged 12 to 240 months with a Plasmodium sp. infection. A total of 3 mL of peripheral blood collected from an EDTA tube was used for leukocyte depletion. DNA mutation detection was performed by next generation sequencing (NGS). A total of 1075 patients were screened for malaria. Among them, 384 had a Plasmodium infection. P. falciparum mono-infection was found in 98.9% of the patients. Pfcrt-326T mutation was found in all isolates, while 37.9% had Pfmdr2-484I mutant allele. The highest median parasite densities were found in patients infected by parasites carrying the CVIET haplotype of the Pfcrt gene. The different genetic profiles found here, and their variations according to clinical and biological signs of severe malaria, are additional arguments for the surveillance of P. falciparum strains.
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Affiliation(s)
- Jacques Mari Ndong Ngomo
- Faculty of Medicine, Department of Parasitology and Mycology, Université des Sciences de la Santé, Libreville BP 4009, Gabon
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Issa I, Lamine MM, Hubert V, Ilagouma A, Adehossi E, Mahamadou A, Lobo NF, Sarr D, Shollenberger LM, Sandrine H, Jambou R, Laminou IM. Prevalence of Mutations in the Pfdhfr, Pfdhps, and Pfmdr1 Genes of Malarial Parasites Isolated from Symptomatic Patients in Dogondoutchi, Niger. Trop Med Infect Dis 2022; 7:tropicalmed7080155. [PMID: 36006247 PMCID: PMC9413624 DOI: 10.3390/tropicalmed7080155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/15/2022] [Accepted: 07/19/2022] [Indexed: 11/16/2022] Open
Abstract
The effectiveness of artemisinin-based combination therapies (ACTs) depends not only on that of artemisinin but also on that of partner molecules. This study aims to evaluate the prevalence of mutations in the Pfdhfr, Pfdhps, and Pfmdr1 genes from isolates collected during a clinical study. Plasmodium genomic DNA samples extracted from symptomatic malaria patients from Dogondoutchi, Niger, were sequenced by the Sanger method to determine mutations in the Pfdhfr (codons 51, 59, 108, and 164), Pfdhps (codons 436, 437, 540, 581, and 613), and Pfmdr1 (codons 86, 184, 1034, and 1246) genes. One hundred fifty-five (155) pre-treatment samples were sequenced for the Pfdhfr, Pfdhps, and Pfmdr1 genes. A high prevalence of mutations in the Pfdhfr gene was observed at the level of the N51I (84.97%), C59R (92.62%), and S108N (97.39%) codons. The key K540E mutation in the Pfdhps gene was not observed. Only one isolate was found to harbor a mutation at codon I431V. The most common mutation on the Pfmdr1 gene was Y184F in 71.43% of the mutations found, followed by N86Y in 10.20%. The triple-mutant haplotype N51I/C59R/S108N (IRN) was detected in 97% of the samples. Single-mutant (ICS and NCN) and double-mutant (IRS, NRN, and ICN) haplotypes were prevalent at 97% and 95%, respectively. Double-mutant haplotypes of the Pfdhps (581 and 613) and Pfmdr (86 and 184) were found in 3% and 25.45% of the isolates studied, respectively. The study focused on the molecular analysis of the sequencing of the Pfdhfr, Pfdhps, and Pfmdr1 genes. Although a high prevalence of mutations in the Pfdhfr gene have been observed, there is a lack of sulfadoxine pyrimethamine resistance. There is a high prevalence of mutation in the Pfmdr184 codon associated with resistance to amodiaquine. These data will be used by Niger’s National Malaria Control Program to better monitor the resistance of Plasmodium to partner molecules in artemisinin-based combination therapies.
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Affiliation(s)
- Ibrahima Issa
- Centre de Recherche Médicale et Sanitaire, Niamey P.O. Box 10887, Niger; (I.I.); (A.M.); (R.J.)
| | | | - Veronique Hubert
- Centre National de Référence du Paludisme à Paris en France, 75013 Paris, France; (V.H.); (H.S.)
| | - Amadou Ilagouma
- Faculty of Sciences, University Abdou Moumouni of Niamey, Niamey P.O. Box 10662, Niger; (A.I.); (E.A.)
| | - Eric Adehossi
- Faculty of Sciences, University Abdou Moumouni of Niamey, Niamey P.O. Box 10662, Niger; (A.I.); (E.A.)
| | - Aboubacar Mahamadou
- Centre de Recherche Médicale et Sanitaire, Niamey P.O. Box 10887, Niger; (I.I.); (A.M.); (R.J.)
| | - Neil F. Lobo
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA;
| | - Demba Sarr
- Department of Infectious Diseases, University of Georgia, Athens, GA 30602, USA;
| | | | - Houze Sandrine
- Centre National de Référence du Paludisme à Paris en France, 75013 Paris, France; (V.H.); (H.S.)
| | - Ronan Jambou
- Centre de Recherche Médicale et Sanitaire, Niamey P.O. Box 10887, Niger; (I.I.); (A.M.); (R.J.)
| | - Ibrahim Maman Laminou
- Centre de Recherche Médicale et Sanitaire, Niamey P.O. Box 10887, Niger; (I.I.); (A.M.); (R.J.)
- Correspondence: ; Tel.: +227-80-88-20-22
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Liu Y, Liang X, Li J, Chen J, Huang H, Zheng Y, He J, Ehapo CS, Eyi UM, Yang P, Lin L, Chen W, Sun G, Liu X, Zha G, Wang J, Wang C, Wei H, Lin M. Molecular Surveillance of Artemisinin-Based Combination Therapies Resistance in Plasmodium falciparum Parasites from Bioko Island, Equatorial Guinea. Microbiol Spectr 2022; 10:e0041322. [PMID: 35670601 PMCID: PMC9241599 DOI: 10.1128/spectrum.00413-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Artemisinin-based combination therapies (ACTs) resistance has emerged and could be diffusing in Africa. As an offshore island on the African continent, the island of Bioko in Equatorial Guinea is considered severely affected and resistant to drug-resistant Plasmodium falciparum malaria. However, the spatial and temporal distribution remain unclear. Molecular monitoring targeting the Pfcrt, Pfk13, Pfpm2, and Pfmdr1 genes was conducted to provide insight into the impact of current antimalarial drug resistance on the island. Furthermore, polymorphic characteristics, haplotype network, and the effect of natural selection of the Pfk13 gene were evaluated. A total of 152 Plasmodium falciparum samples (collected from 2017 to 2019) were analyzed for copy number variation of the Pfpm2 gene and Pfk13, Pfcrt, and Pfmdr1 mutations. Statistical analysis of Pfk13 sequences was performed following different evolutionary models using 96 Bioko sequences and 1322 global sequences. The results showed that the prevalence of Pfk13, Pfcrt, and Pfmdr1 mutations was 73.68%, 78.29%, and 75.66%, respectively. Large proportions of isolates with multiple copies of Pfpm2 were observed (67.86%). In Bioko parasites, the genetic diversity of Pfk13 was low, and purifying selection was suggested by Tajima's D test (-1.644, P > 0.05) and the dN/dS test (-0.0004438, P > 0.05). The extended haplotype homozygosity analysis revealed that Pfk13_K189T, although most frequent in Africa, has not yet conferred a selective advantage for parasitic survival. The results suggested that the implementation of continuous drug monitoring on Bioko Island is an essential measure. IMPORTANCE Malaria, one of the tropical parasitic diseases with a high transmission rate in Bioko Island, Equatorial Guinea, especially caused by P. falciparum is highly prevalent in this region and is commonly treated locally with ACTs. The declining antimalarial susceptibility of artemisinin-based drugs suggested that resistance to artemisinin and its derivatives is developing in P. falciparum. Copy number variants in Pfpm2 and genetic polymorphisms in Pfk13, Pfcrt, and Pfmdr1 can be used as risk assessment indicators to track the development and spread of drug resistance. This study reported for the first time the molecular surveillance of Pfpm2, Pfcrt, Pfk13, and Pfmdr1 genes in Bioko Island from 2017 to 2019 to assess the possible risk of local drug-resistant P. falciparum.
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Affiliation(s)
- YaQun Liu
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
| | - XueYan Liang
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
| | - Jian Li
- School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, Hubei, People’s Republic of China
| | - JiangTao Chen
- The Chinese Medical Aid Team to the Republic of Equatorial Guinea, Guangzhou, Guangdong, People's Republic of China
- Department of Medical Laboratory, Huizhou Central Hospital, Huizhou, Guangdong, People's Republic of China
| | - HuiYing Huang
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
- School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, Hubei, People’s Republic of China
| | - YuZhong Zheng
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
| | - JinQuan He
- The Chinese Medical Aid Team to the Republic of Equatorial Guinea, Guangzhou, Guangdong, People's Republic of China
| | - Carlos Salas Ehapo
- Department of Medical Laboratory, Malabo Regional Hospital, Malabo, Equatorial Guinea
| | - Urbano Monsuy Eyi
- Department of Medical Laboratory, Malabo Regional Hospital, Malabo, Equatorial Guinea
| | - PeiKui Yang
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
| | - LiYun Lin
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
| | - WeiZhong Chen
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong, People's Republic of China
| | - GuangYu Sun
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong, People's Republic of China
| | - XiangZhi Liu
- Department of Medical Laboratory, Chaozhou People’s Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong, People's Republic of China
| | - GuangCai Zha
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
| | - JunLi Wang
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, People’s Republic of China
| | - ChunFang Wang
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, People’s Republic of China
| | - HuaGui Wei
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, People’s Republic of China
| | - Min Lin
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, Guangdong, People’s Republic of China
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, People’s Republic of China
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Pembet Singana B, Casimiro PN, Matondo Diassivi B, Kobawila SC, Youndouka JM, Basco LK, Ringwald P, Briolant S, Ndounga M. Prevalence of malaria among febrile patients and assessment of efficacy of artemether-lumefantrine and artesunate-amodiaquine for uncomplicated malaria in Dolisie, Republic of the Congo. Malar J 2022; 21:137. [PMID: 35501861 PMCID: PMC9063077 DOI: 10.1186/s12936-022-04143-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 03/28/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND In the Republic of the Congo, malaria represents a major public health problem affecting all age groups. A regular surveillance of the current efficacy of first-line anti-malarial drugs is required in the face of possible emergence and spread of artemisinin-resistant Plasmodium falciparum strains in Africa. The purpose of this study was to determine the prevalence of malaria among febrile patients of all ages and assess the efficacy of artemether-lumefantrine (AL) and artesunate-amodiaquine (ASAQ) in Congolese children. METHODS Febrile patients of all ages were initially screened for malaria by both rapid diagnostic test (RDT) and microscopy. Patients less than 12 years of age, with parasitaemia ≥ 1000 asexual parasites of P. falciparum/µL of blood, without any signs of severity, were enrolled in a therapeutic efficacy study and treated after obtaining their parents' (or legal guardian's) informed consent in two health centres in Dolisie. The patients were followed for 28 days in accordance with the 2009 World Health Organization standard protocol. If parasitaemia reappeared on or after day 7, the genetic profiles (genes expressing merozoite surface protein-1 [msp1], merozoite surface protein-2 [msp2], and glutamine-rich protein [glurp]) of pre-treatment and post-treatment isolates were compared by nested polymerase chain reaction (PCR) followed by capillary electrophoresis to make a distinction between recrudescence and re-infection. The clinical and parasitological outcome was analysed by the per-protocol method and Kaplan-Meier survival curves. RESULTS A total of 994 febrile patients of all ages were screened by RDT and microscopy. Of 994 patients, 323 (32.5%) presented a positive RDT, and 266 (26.8%) were microscopy-positive. Based on microscopy as the reference diagnostic method, the sensitivity and the specificity of the RDT were 98.9 and 91.8%, respectively. The Cohen's kappa coefficient was 0.86. A total of 121 children aged less than 12 years (61 in AL treatment group and 60 in ASAQ treatment group) were included in therapeutic efficacy study. Before PCR correction, the proportions of adequate clinical and parasitological response were 96.6% for AL and 86.0% for ASAQ in the per-protocol population (P < 0.05). The PCR-corrected efficacy rates were 98.2% and 94.2% for AL and ASAQ, respectively (P > 0.05). Both treatments were well tolerated. CONCLUSIONS AL and ASAQ remain highly effective for the first-line treatment of uncomplicated P. falciparum malaria in Dolisie. Despite high efficacy of first- and second-line treatment, there is a continuing need to scale up effective malaria preventive interventions and vector control strategies in the country. TRIAL REGISTRATION NUMBER ACTRN12616001422415.
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Affiliation(s)
- Brice Pembet Singana
- grid.442828.00000 0001 0943 7362Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69 Brazzaville, Republic of the Congo
| | - Prisca Nadine Casimiro
- Institut National de Recherche en Sciences de la Santé, Brazzaville, Republic of the Congo
| | | | - Simon Charles Kobawila
- grid.442828.00000 0001 0943 7362Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69 Brazzaville, Republic of the Congo
| | - Jean-Mermoz Youndouka
- Programme National de Lutte Contre le Paludisme, Direction Générale de l’Epidémiologie de la Maladie, Ministère de la Santé et de la Population, Brazzaville, Republic of the Congo
| | - Leonardo K. Basco
- Aix Marseille Univ., IRD, AP-HM, SSA, VITROME, Marseille, France ,grid.483853.10000 0004 0519 5986IHU-Méditerranée Infection, Marseille, France
| | - Pascal Ringwald
- grid.3575.40000000121633745Global Malaria Programme, World Health Organization, Geneva, Switzerland
| | - Sébastien Briolant
- Aix Marseille Univ., IRD, AP-HM, SSA, VITROME, Marseille, France ,grid.483853.10000 0004 0519 5986IHU-Méditerranée Infection, Marseille, France ,grid.418221.cUnité de Parasitologie Entomologie, Département de Microbiologie et Maladies Infectieuses, Institut de Recherche Biomédicale des Armées, Marseille, France
| | - Mathieu Ndounga
- Programme National de Lutte Contre le Paludisme, Direction Générale de l’Epidémiologie de la Maladie, Ministère de la Santé et de la Population, Brazzaville, Republic of the Congo
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Owoloye A, Olufemi M, Idowu ET, Oyebola KM. Prevalence of potential mediators of artemisinin resistance in African isolates of Plasmodium falciparum. Malar J 2021; 20:451. [PMID: 34856982 PMCID: PMC8638531 DOI: 10.1186/s12936-021-03987-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 11/16/2021] [Indexed: 11/30/2022] Open
Abstract
Background The devastating public health impact of malaria has prompted the need for effective interventions. Malaria control gained traction after the introduction of artemisinin-based combination therapy (ACT). However, the emergence of artemisinin (ART) partial resistance in Southeast Asia and emerging reports of delayed parasite sensitivity to ACT in African parasites signal a gradual trend towards treatment failure. Monitoring the prevalence of mutations associated with artemisinin resistance in African populations is necessary to stop resistance in its tracks. Mutations in Plasmodium falciparum genes pfk13, pfcoronin and pfatpase6 have been linked with ART partial resistance. Methods Findings from published research articles on the prevalence of pfk13, pfcoronin and pfatpase6 polymorphisms in Africa were collated. PubMed, Embase and Google Scholar were searched for relevant articles reporting polymorphisms in these genes across Africa from 2014 to August 2021, for pfk13 and pfcoronin. For pfatpase6, relevant articles between 2003 and August 2021 were retrieved. Results Eighty-seven studies passed the inclusion criteria for this analysis and reported 742 single nucleotide polymorphisms in 37,864 P. falciparum isolates from 29 African countries. Five validated-pfk13 partial resistance markers were identified in Africa: R561H in Rwanda and Tanzania, M476I in Tanzania, F446I in Mali, C580Y in Ghana, and P553L in an Angolan isolate. In Tanzania, three (L263E, E431K, S769N) of the four mutations (L263E, E431K, A623E, S769N) in pfatpase6 gene associated with high in vitro IC50 were reported. pfcoronin polymorphisms were reported in Senegal, Gabon, Ghana, Kenya, and Congo, with P76S being the most prevalent mutation. Conclusions This meta-analysis provides an overview of the prevalence and widespread distribution of pfk13, pfcoronin and pfatpase6 mutations in Africa. Understanding the phenotypic consequences of these mutations can provide information on the efficacy status of artemisinin-based treatment of malaria across the continent. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12936-021-03987-6.
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Affiliation(s)
- Afolabi Owoloye
- Genomic Research in Biomedicine Laboratory, Biochemistry and Nutrition Department, Nigerian Institute of Medical Research, Lagos, Nigeria.,Parasitology and Bioinformatics Unit, Department of Zoology, Faculty of Science, University of Lagos, Lagos, Nigeria
| | - Michael Olufemi
- Genomic Research in Biomedicine Laboratory, Biochemistry and Nutrition Department, Nigerian Institute of Medical Research, Lagos, Nigeria.,Parasitology and Bioinformatics Unit, Department of Zoology, Faculty of Science, University of Lagos, Lagos, Nigeria
| | - Emmanuel T Idowu
- Parasitology and Bioinformatics Unit, Department of Zoology, Faculty of Science, University of Lagos, Lagos, Nigeria
| | - Kolapo M Oyebola
- Genomic Research in Biomedicine Laboratory, Biochemistry and Nutrition Department, Nigerian Institute of Medical Research, Lagos, Nigeria. .,Parasitology and Bioinformatics Unit, Department of Zoology, Faculty of Science, University of Lagos, Lagos, Nigeria. .,Sickle Cell Branch, National Heart Lung and Blood Institute, US National Institutes of Health, Bethesda, MD, USA.
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Kayiba NK, Yobi DM, Tshibangu-Kabamba E, Tuan VP, Yamaoka Y, Devleesschauwer B, Mvumbi DM, Okitolonda Wemakoy E, De Mol P, Mvumbi GL, Hayette MP, Rosas-Aguirre A, Speybroeck N. Spatial and molecular mapping of Pfkelch13 gene polymorphism in Africa in the era of emerging Plasmodium falciparum resistance to artemisinin: a systematic review. THE LANCET. INFECTIOUS DISEASES 2020; 21:e82-e92. [PMID: 33125913 DOI: 10.1016/s1473-3099(20)30493-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 03/29/2020] [Accepted: 04/21/2020] [Indexed: 12/19/2022]
Abstract
The spread of Plasmodium falciparum isolates carrying mutations in the kelch13 (Pfkelch13) gene associated with artemisinin resistance (PfART-R) in southeast Asia threatens malaria control and elimination efforts. Emergence of PfART-R in Africa would result in a major public health problem. In this systematic review, we investigate the frequency and spatial distribution of Pfkelch13 mutants in Africa, including mutants linked to PfART-R in southeast Asia. Seven databases were searched (PubMed, Embase, Scopus, African Journal Online, African Index Medicus, Bioline, and Web of Science) for relevant articles about polymorphisms of the Pfkelch13 gene in Africa before January, 2019. Following PRISMA guidelines, 53 studies that sequenced the Pfkelch13 gene of 23 100 sample isolates in 41 sub-Saharan African countries were included. The Pfkelch13 sequence was highly polymorphic (292 alleles, including 255 in the Pfkelch13-propeller domain) but with mutations occurring at very low relative frequencies. Non-synonymous mutations were found in only 626 isolates (2·7%) from west, central, and east Africa. According to WHO, nine different mutations linked to PfART-R in southeast Asia (Phe446Ile, Cys469Tyr, Met476Ile, Arg515Lys, Ser522Cys, Pro553Leu, Val568Gly, Pro574Leu, and Ala675Val) were detected, mainly in east Africa. Several other Pfkelch13 mutations, such as those structurally similar to southeast Asia PfART-R mutations, were also identified, but their relevance for drug resistance is still unknown. This systematic review shows that Africa, thought to not have established PfART-R, reported resistance-related mutants in the past 5 years. Surveillance using PfART-R molecular markers can provide valuable decision-making information to sustain the effectiveness of artemisinin in Africa.
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Affiliation(s)
- Nadine K Kayiba
- Institute of Health and Society, Université catholique de Louvain, Brussels, Belgium; Department of Public Health, University of Mbujimayi, Mbujimayi, DR Congo; Department of Epidemiology and Biostatistics, University of Kinshasa, Kinshasa, DR Congo
| | - Doudou M Yobi
- Department of Basic Sciences, University of Kinshasa, Kinshasa, DR Congo
| | - Evariste Tshibangu-Kabamba
- Department of Basic Sciences, University of Mbujimayi, Mbujimayi, DR Congo; Department of Environmental and Preventive Medicine, Oita University, Yufu, Japan
| | - Vo P Tuan
- Department of Endoscopy, Cho Ray Hospital, Ho Chi Minh, Vietnam; Department of Environmental and Preventive Medicine, Oita University, Yufu, Japan
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Oita University, Yufu, Japan
| | - Brecht Devleesschauwer
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium; Department of Veterinary Public Health and Food Safety, Ghent University, Merelbeke, Belgium
| | - Dieudonné M Mvumbi
- Department of Basic Sciences, University of Kinshasa, Kinshasa, DR Congo
| | | | - Patrick De Mol
- Department of Parasitology and Mycology, University Hospital of Liège, Liège, Belgium
| | - Georges L Mvumbi
- Department of Basic Sciences, University of Kinshasa, Kinshasa, DR Congo
| | - Marie-Pierre Hayette
- Department of Parasitology and Mycology, University Hospital of Liège, Liège, Belgium
| | - Angel Rosas-Aguirre
- Institute of Health and Society, Université catholique de Louvain, Brussels, Belgium
| | - Niko Speybroeck
- Institute of Health and Society, Université catholique de Louvain, Brussels, Belgium.
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Dossou-Yovo LR, Ntoumi F, Koukouikila-Koussounda F, Vouvoungui JC, Adedoja A, Nderu D, Velavan TP, Lenga A. Molecular surveillance of the Pfmdr1 N86Y allele among Congolese pregnant women with asymptomatic malaria. Malar J 2020; 19:178. [PMID: 32384930 PMCID: PMC7206803 DOI: 10.1186/s12936-020-03246-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 04/26/2020] [Indexed: 12/24/2022] Open
Abstract
Background Malaria in pregnancy is associated with considerable morbidity and mortality. Regular surveillance of artemisinin-based combination therapy tolerance, or molecular makers of resistance, is vital for effective malaria treatment, control and eradication programmes. Plasmodium falciparum multiple drug resistance-1 gene (Pfmdr1) N86Y mutation is associated with reduced susceptibility to lumefantrine. This study assessed the prevalence of Pfmdr1 N86Y in Brazzaville, Republic of Congo. Methods A total 1001 of P. falciparum-infected blood samples obtained from asymptomatic malaria pregnant women having a normal child delivery at the Madibou Integrated Health Centre were analysed. Pfmdr1 N86Y genotyping was conducted using PCR-restriction fragment length polymorphism. Results The wild type Pfmdr1 N86 allele was predominant (> 68%) in this study, whereas a few isolates carrying the either the mutant allele (Pfmdr1 86Y) alone or both alleles (mixed genotype). The dominance of the wildtype allele (pfmdr1 N86) indicates the plausible decline P. falciparum susceptibility to lumefantrine. Conclusion This study gives an update on the prevalence of Pfmdr1 N86Y alleles in Brazzaville, Republic of Congo. It also raises concern on the imminent emergence of resistance against artemether–lumefantrine in this setting. This study underscores the importance to regular artemether–lumefantrine efficacy monitoring to inform the malaria control programme of the Republic of Congo.
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Affiliation(s)
- Louis Regis Dossou-Yovo
- Ecole Normale Supérieure, Marien Ngouabi University, Brazzaville, Republic of Congo.,Congolese Foundation for Medical Research, Brazzaville, Republic of Congo
| | - Francine Ntoumi
- Congolese Foundation for Medical Research, Brazzaville, Republic of Congo. .,Faculty of Science and Technology, Marien Ngouabi University, Brazzaville, Republic of Congo. .,Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany.
| | - Felix Koukouikila-Koussounda
- Congolese Foundation for Medical Research, Brazzaville, Republic of Congo.,Faculty of Science and Technology, Marien Ngouabi University, Brazzaville, Republic of Congo
| | | | - Ayodele Adedoja
- Congolese Foundation for Medical Research, Brazzaville, Republic of Congo
| | - David Nderu
- School of Health Sciences, Kirinyaga University, Kerugoya, Kenya.,Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Thirumalaisamy P Velavan
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany.,Vietnamese-German Center for Medical Research (VG-CARE), Hanoi, Vietnam.,Faculty of Medicine, Duy Tan University, Da Nang, Vietnam
| | - Arsène Lenga
- Faculty of Science and Technology, Marien Ngouabi University, Brazzaville, Republic of Congo
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8
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Molecular surveillance of anti-malarial drug resistance in Democratic Republic of Congo: high variability of chloroquinoresistance and lack of amodiaquinoresistance. Malar J 2020; 19:121. [PMID: 32197607 PMCID: PMC7085146 DOI: 10.1186/s12936-020-03192-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 03/13/2020] [Indexed: 12/19/2022] Open
Abstract
Background The loss of chloroquine (CQ) effectiveness has led to its withdrawal from national policies as a first-line treatment for uncomplicated malaria in several endemic countries, such as the Democratic Republic of Congo (DRC). The K76T mutation on the pfcrt gene has been identified as a marker of CQ resistance and the SVMNT haplotype in codons 72–76 on the same gene has been associated with resistance to amodiaquine (AQ). In the DRC, the prevalence of K76T has decreased from 100% in 2000 to 63.9% in 2014. The purpose of this study was to determine the prevalence of K76T mutations in circulating strains of Plasmodium falciparum, 16 years after CQ withdrawal in the DRC and to investigate the presence of the SVMNT haplotype. Methods In 2017, ten geographical sites across the DRC were selected. Dried blood samples were collected from patients attending health centres. Malaria was first detected by a rapid diagnostic test (RDT) available on site (SD Bioline Malaria Ag Pf or CareStart Malaria Pf) or thick blood smear and then confirmed by a P. falciparum species-specific real-time PCR assay. A pfcrt gene segment containing a fragment that encodes amino acids at positions 72–76 was amplified by conventional PCR before sequencing. Results A total of 1070 patients were enrolled. Of the 806 PCR-confirmed P. falciparum positive samples, 764 were successfully sequenced. The K76T mutation was detected in 218 samples (28.5%; 95% CI 25.4%–31.9%), mainly (96%) with the CVIET haplotype. Prevalence of CQ resistance marker was unequally distributed across the country, ranging from 1.5% in Fungurume to 89.5% in Katana. The SVMNT haplotype, related to AQ resistance, was not detected. Conclusion Overall, the frequency of the P. falciparum CQ resistance marker has decreased significantly and no resistance marker to AQ was detected in the DRC in 2017. However, the between regions variability of CQ resistance remains high in the country. Further studies are needed for continuous monitoring of the CQ resistance level for its prospective re-use in malaria management. The absence of the AQ resistance marker is in line with the use of this drug in the current DRC malaria treatment policy.
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An alternative dogma on reduced artemisinin susceptibility: A new shadow from east to west. Proc Natl Acad Sci U S A 2020; 116:12611-12612. [PMID: 31239363 PMCID: PMC6601264 DOI: 10.1073/pnas.1907142116] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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10
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Geographic Plasmodium falciparum sarcoplasmic reticulum Ca2+ ATPase (PfSERCA) genotype diversity in India. Acta Trop 2020; 202:105095. [PMID: 31323193 DOI: 10.1016/j.actatropica.2019.105095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 11/18/2018] [Accepted: 07/15/2019] [Indexed: 11/22/2022]
Abstract
Plasmodium falciparum sarcoplasmic reticulum Ca2+ ATPase (PfSERCA) is sarcoplasmic reticulum membrane bound transporter to regulate cytosol Ca2+ ions. Ca2+ act as secondary messenger and play important role in differentiation of parasite during its life cycle. Present study is epidemiological surveillance of PfSERCA (Pf3D7_0106300) gene fragment harboring 263, 402, 431 codon to look for its single nucleotide polymorphism which is well documented to be associated with Artemisinin tolerance. Filter paper with finger pricked blood samples for Plasmodium falciparum infected uncomplicated malaria patients were obtained for region as diverse as down the longitude from east to west of India i.e. Mizoram, Tripura, Meghalaya, Jharkhand, Odhisa. There observed no mutation for codon 263 at all study sites. Mizoram showed highest PfSERCA diversity with well known SNPs of L402 V, E431 K, A438 V and novel mutations as well i.e. A338 V, S357Y, S379Y. Tripura reported highest proportion of Plasmodium isolates (18.5%) with E431 K single nucleotide polymorphism. Moving towards the west i.e. Meghalaya, Jharkhand, Odhisa showed no occurrence of most prevalent PfSERCA 431, 402 polymorphism worldwide but some novel mutations and its haplotypes. In present study, significantly increased proportion of novel PfSERCA polymorphism among children suggests the susceptibility of these Plasmodium falciparum strains to acquired immunity. Mizoram, sharing open international border with south east asia, demonstrated highest PfSERCA diversity. Spatial PfSERCA diversity from far north east India to moving towards west implies its association with antimalarial susceptibility.
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11
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Adegbite BR, Edoa JR, Honkpehedji YJ, Zinsou FJ, Dejon-Agobe JC, Mbong-Ngwese M, Lotola-Mougueni F, Koehne E, Lalremruata A, Kreidenweiss A, Nguyen TT, Kun J, Agnandji ST, Lell B, Safiou AR, Obone Atome FA, Mombo-Ngoma G, Ramharter M, Velavan TP, Mordmüller B, Kremsner PG, Adegnika AA. Monitoring of efficacy, tolerability and safety of artemether-lumefantrine and artesunate-amodiaquine for the treatment of uncomplicated Plasmodium falciparum malaria in Lambaréné, Gabon: an open-label clinical trial. Malar J 2019; 18:424. [PMID: 31842893 PMCID: PMC6916217 DOI: 10.1186/s12936-019-3015-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 11/20/2019] [Indexed: 02/01/2023] Open
Abstract
Background Malaria remains a major public health problem, affecting mainly low-and middle-income countries. The management of this parasitic disease is challenged by ever increasing drug resistance. This study, investigated the therapeutic efficacy, tolerability and safety of artemether–lumefantrine (AL) and artesunate–amodiaquine (AS–AQ), used as first-line drugs to treat uncomplicated malaria in Lambaréné, Gabon. Methods A non-randomized clinical trial was conducted between October 2017 and March 2018 to assess safety, clinical and parasitological efficacy of fixed-doses of AL and AS–AQ administered to treat uncomplicated Plasmodium falciparum malaria in children aged from 6 months to 12 years. After 50 children were treated with AL, another 50 children received ASAQ. The 2009 World Health Organization protocol for monitoring of the efficacy of anti‑malarial drugs was followed. Molecular markers msp1 and msp2 were used to differentiate recrudescence and reinfection. For the investigation of artemisinin resistant markers, gene mutations in Pfk13 were screened. Results Per-protocol analysis on day 28 showed a PCR corrected cure rate of 97% (95% CI 86–100) and 95% (95% CI 84–99) for AL and AS–AQ, respectively. The most frequent adverse event in both groups was asthenia. No mutations in the kelch-13 gene associated with artemisinin resistance were identified. All participants had completed microscopic parasite clearance by day 3 post-treatment. Conclusion This study showed that AL and AS–AQ remain efficacious, well-tolerated, and are safe to treat uncomplicated malaria in children from Lambaréné. However, a regular monitoring of efficacy and a study of molecular markers of drug resistance to artemisinin in field isolates is essential. Trial registration ANZCTR, ACTRN12616001600437. Registered 18 November, http://www.anzctr.org.au/TrialSearch.aspx?searchTxt=ACTRN12616001600437p&isBasic=True
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Affiliation(s)
- Bayode R Adegbite
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon
| | - Jean R Edoa
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon
| | - Yabo J Honkpehedji
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - Frejus J Zinsou
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jean C Dejon-Agobe
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Center of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | | | | | - Erik Koehne
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Albert Lalremruata
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Andrea Kreidenweiss
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - The T Nguyen
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Vietnamese-German Center for Medical Research, Hanoi, Vietnam
| | - Jutta Kun
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Selidji T Agnandji
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Bertrand Lell
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Division of Infectious Diseases and Tropical Medicine, Department of Medicine 1, Medical University of Vienna, Vienna, Austria
| | - Abdou R Safiou
- Programme National de Lutte contre le paludisme, Libreville, Gabon
| | | | - Ghyslain Mombo-Ngoma
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Department of Tropical Medicine, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.,Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Michael Ramharter
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Department of Tropical Medicine, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.,Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thirumalaisamy P Velavan
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Vietnamese-German Center for Medical Research, Hanoi, Vietnam
| | - Benjamin Mordmüller
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,German Center for Infection Research, Tübingen, Germany
| | - Peter G Kremsner
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,German Center for Infection Research, Tübingen, Germany
| | - Ayola A Adegnika
- Centre de Recherches Médicales de Lambaréné, BP: 242, Lambaréné, Gabon. .,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany. .,Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands. .,German Center for Infection Research, Tübingen, Germany.
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12
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Development of artemisinin resistance in malaria therapy. Pharmacol Res 2019; 146:104275. [DOI: 10.1016/j.phrs.2019.104275] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/09/2019] [Accepted: 05/13/2019] [Indexed: 01/23/2023]
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13
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Bakhiet AMA, Abdelraheem MH, Kheir A, Omer S, Gismelseed L, Abdel-Muhsin AMA, Naiem A, Al Hosni A, Al Dhuhli A, Al Rubkhi M, Al-Hamidhi S, Gadalla A, Mukhtar M, Sultan AA, Babiker HA. Evolution of Plasmodium falciparum drug resistance genes following artemisinin combination therapy in Sudan. Trans R Soc Trop Med Hyg 2019; 113:693-700. [DOI: 10.1093/trstmh/trz059] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/21/2019] [Accepted: 06/01/2019] [Indexed: 01/10/2023] Open
Abstract
Abstract
Background
Malaria control efforts in Sudan rely heavily on case management. In 2004, health authorities adopted artemisinin-based combination therapies (ACTs) for the treatment of uncomplicated malaria. However, some recent surveys have reported ACT failure and a prevalent irrational malaria treatment practice. Here we examine whether the widespread use of ACT and failure to adhere to national guidelines have led to the evolution of drug resistance genes.
Methods
We genotyped known drug resistance markers (Pfcrt, Pfmdr-1, Pfdhfr, Pfdhps, Pfk13 propeller) and their flanking microsatellites among Plasmodium falciparum isolates obtained between 2009 and 2016 in different geographical regions in Sudan. Data were then compared with published findings pre-ACT (1992–2003).
Results
A high prevalence of Pfcrt76T, Pfmdr-1-86Y, Pfdhfr51I, Pfdhfr108N, Pfdhps37G was observed in all regions, while no Pfk13 mutations were detected. Compared with pre-ACT data, Pfcrt-76T and Pfmdr-1-86Y have decayed, while Pfdhfr-51I, Pfdhfr-108N and Pfdhps-437G strengthened. Haplotypes Pfcrt-CVIET, Pfmdr-1-NFSND/YFSND, Pfdhfr-ICNI and Pfdhps-SGKAA predominated in all sites. Microsatellites flanking drug resistance genes showed lower diversity than neutral ones, signifying high ACT pressure/selection.
Conclusions
Evaluation of P. falciparum drug resistance genes in Sudan matches the drug deployment pattern. Regular monitoring of these genes, coupled with clinical response, should be considered to combat the spread of ACT resistance.
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Affiliation(s)
- Amani M A Bakhiet
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
- Sudan Academy of Sciences, Department of Epidemiology and Molecular Biology, Khartoum, Sudan
| | - Mohamed H Abdelraheem
- Department of Microbiology and Immunology, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
| | | | - Samia Omer
- Tropical Medicine Research Institute, Khartoum, Sudan
| | - Linda Gismelseed
- Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
| | - Abdel-Muhsin A Abdel-Muhsin
- Sudan Academy of Sciences, Department of Epidemiology and Molecular Biology, Khartoum, Sudan
- Department of Biology, Faculty of Science, University of Hail, Kingdom of Saudi Arabia
| | - Ahmed Naiem
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
| | - Ahmed Al Hosni
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
| | - Amani Al Dhuhli
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
| | - Maymona Al Rubkhi
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
| | - Salama Al-Hamidhi
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
| | - Amal Gadalla
- Division of Population Medicine, School of Medicine, College of Biomedical Sciences, Cardiff University, Cardiff, UK
| | - Moawia Mukhtar
- Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan
- Bioscience Research, Institute, Ibn Sina University, Khartoum, Sudan
| | - Ali A Sultan
- Department of Microbiology and Immunology, Weill Cornell Medicine - Qatar, Qatar Foundation - Education City, Doha, Qatar
| | - Hamza A Babiker
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Sultan Qaboos University, Al Khoudh, Oman
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14
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Distribution of the cytochrome P450 CYP2C8*2 allele in Brazzaville, Republic of Congo. Int J Infect Dis 2019; 85:49-53. [DOI: 10.1016/j.ijid.2019.04.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 01/03/2023] Open
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15
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Leblanc C, Vasse C, Minodier P, Mornand P, Naudin J, Quinet B, Siriez JY, Sorge F, de Suremain N, Thellier M, Kendjo E, Faye A, Imbert P. Management and prevention of imported malaria in children. Update of the French guidelines. Med Mal Infect 2019; 50:127-140. [PMID: 30885541 DOI: 10.1016/j.medmal.2019.02.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 02/18/2019] [Indexed: 01/09/2023]
Abstract
Since the 2007 French guidelines on imported Falciparum malaria, the epidemiology, treatment, and prevention of malaria have changed considerably requiring guidelines for all Plasmodium species to be updated. Over the past decade, the incidence of imported malaria has decreased in all age groups, reflecting the decrease in the incidence of malaria in endemic areas. The rates of severe pediatric cases have increased as in adults, but fatalities are rare. The parasitological diagnosis requires a thick blood smear (or a rapid immunochromatographic test) and a thin blood film. Alternatively, a rapid antigen detection test can be paired with a thin blood film. Thrombocytopenia in children presenting with fever is highly predictive of malaria following travel to a malaria-endemic area and, when detected, malaria should be strongly considered. The first-line treatment of uncomplicated P. falciparum malaria is now an artemisinin-based combination therapy (ACT), either artemether-lumefantrine or artenimol-piperaquine, as recommended by the World Health Organization in endemic areas. Uncomplicated presentations of non-falciparum malaria should be treated either with chloroquine or ACT. The first-line treatment of severe malaria is now intravenous artesunate which is more effective than quinine in endemic areas. Quinine is restricted to cases where artesunate is contraindicated or unavailable. Prevention of malaria in pediatric travelers consists of nocturnal personal protection against mosquitoes (especially insecticide-treated nets) combined with chemoprophylaxis according to the risk level.
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Affiliation(s)
- C Leblanc
- Pédiatrie générale et maladies infectieuses, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France
| | - C Vasse
- Accueil des urgences pédiatriques, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France
| | - P Minodier
- Urgences enfants, CHU Nord, chemin des Bourrely, 13015 Marseille, France; Groupe de pédiatrie tropicale de la Société française de pédiatrie, pédiatrie générale, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France
| | - P Mornand
- Groupe de pédiatrie tropicale de la Société française de pédiatrie, pédiatrie générale, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France; Service de pédiatrie et aval des urgences, hôpital d'Enfants A. Trousseau, 26, avenue du docteur Arnold-Netter, 75012 Paris, France
| | - J Naudin
- Réanimation pédiatrique, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France
| | - B Quinet
- Groupe de pédiatrie tropicale de la Société française de pédiatrie, pédiatrie générale, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France; Service de pédiatrie et aval des urgences, hôpital d'Enfants A. Trousseau, 26, avenue du docteur Arnold-Netter, 75012 Paris, France
| | - J Y Siriez
- Accueil des urgences pédiatriques, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France
| | - F Sorge
- Groupe de pédiatrie tropicale de la Société française de pédiatrie, pédiatrie générale, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France; Service de pédiatrie générale, hôpital Necker, 149, rue de Sèvres, 75015 Paris, France
| | - N de Suremain
- Groupe de pédiatrie tropicale de la Société française de pédiatrie, pédiatrie générale, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France; Service de pédiatrie et aval des urgences, hôpital d'Enfants A. Trousseau, 26, avenue du docteur Arnold-Netter, 75012 Paris, France
| | - M Thellier
- Centre national de référence du paludisme, service de parasitologie-mycologie, hôpital Pitié-Salpêtrière, 43-87, boulevard de l'Hôpital, 75013 Paris, France
| | - E Kendjo
- Centre national de référence du paludisme, service de parasitologie-mycologie, hôpital Pitié-Salpêtrière, 43-87, boulevard de l'Hôpital, 75013 Paris, France
| | - A Faye
- Pédiatrie générale et maladies infectieuses, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France; Groupe de pédiatrie tropicale de la Société française de pédiatrie, pédiatrie générale, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France
| | - P Imbert
- Groupe de pédiatrie tropicale de la Société française de pédiatrie, pédiatrie générale, hôpital Robert-Debré, 48, boulevard Sérurier, 75019 Paris, France; Centre de vaccinations internationales, hôpital d'instruction des armées Bégin, 69, avenue de Paris, 94160 Saint-Mandé, France.
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16
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Blanton RE. Population Genetics and Molecular Epidemiology of Eukaryotes. Microbiol Spectr 2018; 6:10.1128/microbiolspec.AME-0002-2018. [PMID: 30387414 PMCID: PMC6217834 DOI: 10.1128/microbiolspec.ame-0002-2018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Indexed: 01/16/2023] Open
Abstract
Molecular epidemiology uses the distribution and organization of a pathogen's DNA to understand the distribution and determinants of disease. Since the biology of DNA for eukaryotic pathogens differs substantially from that of bacteria, the analytic approach to their molecular epidemiology can also differ. While many of the genotyping techniques presented earlier in this series, "Advances in Molecular Epidemiology of Infectious Diseases," can be applied to eukaryotes, the output must be interpreted in the light of how DNA is distributed from one generation to the next. In some cases, parasite populations can be evaluated in ways reminiscent of bacteria. They differ, however, when analyzed as sexually reproducing organisms, where all individuals are unique but the genetic composition of the population does not change unless a limited set of events occurs. It is these events (migration, mutation, nonrandom mating, selection, and genetic drift) that are of interest. At a given time, not all of them are likely to be equally important, so the list can easily be narrowed down to understand the driving forces behind the population as it is now and even what it will look like in the future. The main population characteristics measured to assess these events are differentiation and diversity, interpreted in the light of what is known about the population from observation. The population genetics of eukaryotes is important for planning and evaluation of control measures, surveillance, outbreak investigation, and monitoring of the development and spread of drug resistance. *This article is part of a curated collection.
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Affiliation(s)
- Ronald E Blanton
- Center for Global Health & Diseases, Case Western Reserve University, Cleveland, OH 44106
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17
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Mayengue PI, Niama RF, Kouhounina Batsimba D, Malonga-Massanga A, Louzolo I, Loukabou Bongolo NC, Macosso L, Ibara Ottia R, Kimbassa Ngoma G, Dossou-Yovo LR, Pembet Singana B, Ahombo G, Sekangue Obili G, Kobawila SC, Parra HJ. No polymorphisms in K13-propeller gene associated with artemisinin resistance in Plasmodium falciparum isolated from Brazzaville, Republic of Congo. BMC Infect Dis 2018; 18:538. [PMID: 30373565 PMCID: PMC6206645 DOI: 10.1186/s12879-018-3453-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 10/19/2018] [Indexed: 11/15/2022] Open
Abstract
Background In the Republic of Congo, artemisinin-based combinations have been recommended for the treatment of uncomplicated malaria since 2006. However, the emergence of resistant parasites again these combinations in Southeast Asia is a threat for the control of this disease, especially in sub-Saharan Africa where the weight of the disease is important. Indeed, polymorphisms in Plasmodium falciparum K13-propeller gene have been involved in variations of drug sensitivity of Plasmodium falciparum to artemisinin-based combinations. The aim of the current study is to determine the prevalence of mutations of this gene in isolates collected in three health centers in Brazzaville. Methods From May 2015 to May 2016, a total of 131, 259 and 416 samples from patients with suspected malaria were collected at the Laboratoire National de Santé Publique, Hôpital de Mfilou, and the CSI «Maman Mboualé» respectively. After DNA isolation, genotyping and sequencing of Plasmodium falciparum K13-propeller were performed in positive Plasmodium falciparum isolates identified after msp-2 gene genotyping. Results All 806 samples collected were msp-2 genotyped and Plasmodium falciparum infections were confirmed in 287 samples with 43, 85, 159 samples from Laboratoire National de Santé Publique, Hôpital de Mfilou, and the CSI «Maman Mboualé» respectively. Of these 287 msp-2 positives samples, K13-propeller nested PCR products were successfully obtained from 145 (50.52%) isolates and sequences were generated from 127(87.58%) nested products. None of mutations that were associated with ACTs resistance in Southeast Asia were detected on the samples from three different study sites from Brazzaville. However, one mutation type was observed at position 578, where alanine was substituted by serine (A578S) in two isolates (1.57%, 2/127), those from the Hôpital de Mfilou. No mutation was found in isolates from the two other sites. Conclusion The current study shows a very limited polymorphism in the K13-propeller gene in isolates from the Republic of Congo and K13 polymorphisms associate with ACT resistance are not present in this country. However, permanent and large surveillance of resistant parasite population using K13-propeller gene is recommended.
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Affiliation(s)
- Pembe Issamou Mayengue
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo. .,Laboratoire National de Santé Publique, BP 120, Brazzaville, République du Congo.
| | - Roch Fabien Niama
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo.,Laboratoire National de Santé Publique, BP 120, Brazzaville, République du Congo
| | - Dezi Kouhounina Batsimba
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Alida Malonga-Massanga
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Igor Louzolo
- Laboratoire National de Santé Publique, BP 120, Brazzaville, République du Congo
| | | | - Lucette Macosso
- Laboratoire National de Santé Publique, BP 120, Brazzaville, République du Congo
| | - Reyna Ibara Ottia
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Ghyslain Kimbassa Ngoma
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Louis Régis Dossou-Yovo
- Laboratoire National de Santé Publique, BP 120, Brazzaville, République du Congo.,Ecole Normale Supérieure, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Brice Pembet Singana
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Gabriel Ahombo
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Géril Sekangue Obili
- Centre Hospitalier Universitaire de Brazzaville, BP 1846, Brazzaville, République du Congo
| | - Simon Charles Kobawila
- Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, République du Congo
| | - Henri Joseph Parra
- Laboratoire National de Santé Publique, BP 120, Brazzaville, République du Congo
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18
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Yao Y, Wu K, Xu M, Yang Y, Zhang Y, Yang W, Shang R, Du W, Tan H, Chen J, Lin M, Li J. Surveillance of Genetic Variations Associated with Antimalarial Resistance of Plasmodium falciparum Isolates from Returned Migrant Workers in Wuhan, Central China. Antimicrob Agents Chemother 2018; 62:AAC.02387-17. [PMID: 29941645 PMCID: PMC6125563 DOI: 10.1128/aac.02387-17] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 06/15/2018] [Indexed: 02/05/2023] Open
Abstract
Antimalarial drug resistance developed in Plasmodium falciparum has become a problem for malaria control. Evaluation of drug resistance is the first step for effective malaria control. In this study, we investigated the gene mutations of P. falciparum using blood samples from returned Chinese migrant workers in order to identify drug resistance-associated molecular markers. These workers returned from Africa and Southeast Asia (SEA) during 2011 to 2016. Polymorphisms in pfcrt, pfmdr1, and k13-propeller genes and the haplotype patterns of Pfcrt and Pfmdr1 were analyzed. The results showed the presence of four haplotypes of Pfcrt codons 72 to 76, including CVMNK (wild type), SVMNT and CVIET (mutation types), and CV M/I N/E K/T (mixed type), with 50.57%, 1.14%, 25.00%, and 23.30% prevalence, respectively. For Pfmdr1, N86Y (22.28%) and Y184F (60.01%) were the main prevalent mutations (mutations are underlined). The prevalence of mutation at position 550, 561, 575, and 589 of K13-propeller were 1.09%, 0.54%, 0.54%, and 0.54%, respectively. These data suggested that Pfcrt, Pfmdr1, and K13-propeller polymorphisms are potential markers to assess drug resistance of P. falciparum in China, Africa, and SEA.
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Affiliation(s)
- Yi Yao
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Kai Wu
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, China
| | - Mingxing Xu
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, China
| | - Yan Yang
- Department of Schistosomiasis and Endemic Diseases, Wuhan City Center for Disease Prevention and Control, Wuhan, China
| | - Yijing Zhang
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Wenjing Yang
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Ronghua Shang
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Weixing Du
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Huabing Tan
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Jiangtao Chen
- Laboratory Medical Center, Huizhou Municipal Central Hospital, Huizhou, China
| | - Min Lin
- Department of Histology and Embryology, Shantou University Medical College, Shantou, China
| | - Jian Li
- Department of Human Parasitology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
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19
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Voumbo-Matoumona DF, Akiana J, Madamet M, Kouna LC, Lekana-Douki JB, Pradines B. High prevalence of Plasmodium falciparum antimalarial drug resistance markers in isolates from asymptomatic patients from the Republic of the Congo between 2010 and 2015. J Glob Antimicrob Resist 2018; 14:277-283. [PMID: 30121345 DOI: 10.1016/j.jgar.2018.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 08/01/2018] [Accepted: 08/02/2018] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES This study investigated the prevalence of haplotypes of the Pfdhps, Pfdhfr, Pfcrt, Pfmdr1 and PfK13 resistance markers in isolates from asymptomatic patients from the Republic of the Congo following implementation of artemisinin based-combination therapy (ACT). METHODS Peripheral blood was collected from asymptomatic children in 2010 and 2015 from Brazzaville in the south and in 2013 in the north of the Congo. Genotypes of Pfmdr1, Pfcrt, Pfdhps, Pfdhfr and PfK13 were assessed by PCR. RESULTS Children from 2010 were younger than those from 2015 (mean age 5.38 years vs. 8.67 years; P=0.003). The main Pfcrt haplotype was the wild-type CVMNK (84.85%) in 2010, whereas the mutant CVIET (61.64%) predominated in 2015 (P<0.001). In the north, 45.00% of samples were CVMNK and 10.00% were CVIET. Other samples harboured new haplotypes in the country or mixed alleles. No significant difference in Pfmdr1 haplotypes was observed in 2010 and 2015 and the main haplotypes were NYD and NFD (30.56% vs. 28.57% and 61.11% vs. 42.86% for 2010 and 2015, respectively). In the south, the Pfdhps haplotypes observed were AAKAA, AGKAA, SGKAA and SGEGA (87.50% vs. 0%, 12.50% vs. 33.33%, 0% vs. 33.33% and 0% vs. 33.33% for 2010 and 2015, respectively). For Pfdhfr, the IRNI haplotype was most prevalent (85.71% for 2010, 87.50% for 2013 and 100% for 2015). No PfK13 mutations were found. CONCLUSIONS Monitoring the efficacy of ACT and intermittent preventive treatment with sulfadoxine-pyrimethamine is necessary to ensure an epidemiological survey of asymptomatic malaria.
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Affiliation(s)
- Dominique Fatima Voumbo-Matoumona
- Unité d'Evolution, Epidémiologie et Résistances Parasitaires (UNEEREP), Centre International de Recherche Médicales de Franceville, BP 769 Franceville, Gabon; Unité Parasitologie et Entomologie, Département des Maladies Infectieuses, Institut de Recherche Biomédicale des Armées, Marseille, France; Ecole Doctorale Régionale d'Afrique Centrale en Infectiologie Tropicale, BP 876 Franceville, Gabon
| | - Jean Akiana
- Départements des Masters/Licences, Parcours-Types des Sciences Biologiques, Faculté des Sciences et Techniques, Université Marien Ngouabi, BP 69, Brazzaville, Congo; Direction de la Médecine Préventive et des Essais Cliniques, Laboratoire National de Santé Publique, BP 120 Brazzaville, Congo
| | - Marylin Madamet
- Unité Parasitologie et Entomologie, Département des Maladies Infectieuses, Institut de Recherche Biomédicale des Armées, Marseille, France; Aix-Marseille Univ., IRD, AP-HM, SSA, VITROME, IHU Méditerranée Infection, Marseille, France; Centre National de Référence du Paludisme, Marseille, France
| | - Lady Charlène Kouna
- Unité d'Evolution, Epidémiologie et Résistances Parasitaires (UNEEREP), Centre International de Recherche Médicales de Franceville, BP 769 Franceville, Gabon
| | - Jean Bernard Lekana-Douki
- Unité d'Evolution, Epidémiologie et Résistances Parasitaires (UNEEREP), Centre International de Recherche Médicales de Franceville, BP 769 Franceville, Gabon; Département de Parasitologie Mycologie et de Médecine Tropicale, Université des Science de la Santé, BP 4005 Libreville, Gabon
| | - Bruno Pradines
- Unité Parasitologie et Entomologie, Département des Maladies Infectieuses, Institut de Recherche Biomédicale des Armées, Marseille, France; Aix-Marseille Univ., IRD, AP-HM, SSA, VITROME, IHU Méditerranée Infection, Marseille, France; Centre National de Référence du Paludisme, Marseille, France.
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20
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Patel P, Bharti PK, Bansal D, Ali NA, Raman RK, Mohapatra PK, Sehgal R, Mahanta J, Sultan AA, Singh N. Prevalence of mutations linked to antimalarial resistance in Plasmodium falciparum from Chhattisgarh, Central India: A malaria elimination point of view. Sci Rep 2017; 7:16690. [PMID: 29192183 PMCID: PMC5709362 DOI: 10.1038/s41598-017-16866-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 11/19/2017] [Indexed: 11/09/2022] Open
Abstract
Antimalarial drug resistance is a major global challenge in malaria control and elimination. Mutations in six different genes of Plasmodium falciparum (crt, mdr1, dhfr, dhps, ATPase6 and K-13 propeller) that confer resistance to chloroquine, sulphadoxine-pyrimethamine and artemisinin-based combination therapy were analyzed in samples from Chhattisgarh. Seventy-eight percent of the samples were found to have a pfcrt mutation (53% double, 24% triple and 1% single mutant), and 59% of pfmdr1 genes were found to have an N86Y mutation. Double mutations were recorded in pfdhfr gene among 76% of the samples while only 6% of the samples harbored mutant genotypes in pfdhps. No mutation was found in the K-13 propeller gene, while only one sample showed a mutant genotype for the PfATPase6 gene. The Tajima test confirmed that there is no role of evolutionary natural selection in drug resistance, and gene pairwise linkage of disequilibrium showed significant intragenic association. The high level of pfcrt mutations suggests that parasite resistance to chloroquine is almost at a fixed level, whereas resistance to SP is evolving in the population and parasites remain sensitive to artemisinin derivatives. These findings provide potential information and understanding of the evolution and spread of different drug resistance alleles in Chhattisgarh.
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Affiliation(s)
- Priyanka Patel
- National Institute for Research in Tribal Health, Indian Council of Medical Research, Nagpur Road, Garha, Jabalpur, 482003, Madhya Pradesh, India.,Symbiosis School of Biomedical Sciences, Symbiosis International University, Lavale, Maharashtra, 412115, India
| | - Praveen K Bharti
- National Institute for Research in Tribal Health, Indian Council of Medical Research, Nagpur Road, Garha, Jabalpur, 482003, Madhya Pradesh, India
| | - Devendra Bansal
- Department of Microbiology and Immunology, Weill Cornell Medicine - Qatar, Cornell University, Qatar Foundation - Education City, Doha, Qatar
| | - Nazia A Ali
- National Institute for Research in Tribal Health, Indian Council of Medical Research, Nagpur Road, Garha, Jabalpur, 482003, Madhya Pradesh, India
| | - Rajive K Raman
- Medical Officer, Community Health Centre Janakpur, District Baikunthpur, Chhattisgarh, India
| | - Pradyumna K Mohapatra
- Regional Medical Research Centre, NE, Indian Council of Medical Research, Post Box no. 105, Dibrugarh, 786 001, Assam, India
| | - Rakesh Sehgal
- Department of Medical Parasitology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, Punjab, India
| | - Jagadish Mahanta
- Regional Medical Research Centre, NE, Indian Council of Medical Research, Post Box no. 105, Dibrugarh, 786 001, Assam, India
| | - Ali A Sultan
- Department of Microbiology and Immunology, Weill Cornell Medicine - Qatar, Cornell University, Qatar Foundation - Education City, Doha, Qatar
| | - Neeru Singh
- National Institute for Research in Tribal Health, Indian Council of Medical Research, Nagpur Road, Garha, Jabalpur, 482003, Madhya Pradesh, India.
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