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Royo J, Camara A, Bertrand B, Batigne P, Coste A, Pipy B, Aubouy A. Kinetics of monocyte subpopulations during experimental cerebral malaria and its resolution in a model of late chloroquine treatment. Front Cell Infect Microbiol 2022; 12:952993. [PMID: 36310859 PMCID: PMC9614070 DOI: 10.3389/fcimb.2022.952993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
Cerebral malaria (CM) is one of the most severe forms of malaria and is a neuropathology that can lead to death. Monocytes have been shown to accumulate in the brain microvasculature at the onset of neurological symptoms during CM. Monocytes have a remarkable ability to adapt their function to their microenvironment from pro-inflammatory to resolving activities. This study aimed to describe the behavior of monocyte subpopulations during infection and its resolution. C57BL/6 mice were infected with the Plasmodium berghei ANKA strain and treated or not with chloroquine (CQ) on the first day of the onset of neurological symptoms (day 6) for 4 days and followed until day 12 to mimic neuroinflammation and its resolution during experimental CM. Ly6C monocyte subpopulations were identified by flow cytometry of cells from the spleen, peripheral blood, and brain and then quantified and characterized at different time points. In the brain, the Ly6Cint and Ly6Clow monocytes were associated with neuroinflammation, while Ly6Chi and Ly6Cint were mobilized from the peripheral blood to the brain for resolution. During neuroinflammation, CD36 and CD163 were both involved via splenic monocytes, whereas our results suggest that the low CD36 expression in the brain during the neuroinflammation phase was due to degradation. The resolution phase was characterized by increased expressions of CD36 and CD163 in blood Ly6Clow monocytes, a higher expression of CD36 in the microglia, and restored high expression levels of CD163 in Ly6Chi monocytes localized in the brain. Thus, our results suggest that increasing the expressions of CD36 and CD163 specifically in the brain during the neuroinflammatory phase contributes to its resolution.
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Affiliation(s)
- Jade Royo
- Unité Mixte de Recherche (UMR152) Pharmcochimie et biologie pour le développement (PHARMADEV), Université de Toulouse, French National Research Institue for Sustainable Development (IRD), UPS, Toulouse, France
| | - Aissata Camara
- Unité Mixte de Recherche (UMR152) Pharmcochimie et biologie pour le développement (PHARMADEV), Université de Toulouse, French National Research Institue for Sustainable Development (IRD), UPS, Toulouse, France
- Pharmacy Department, Institut de Recherche et de Développement des Plantes Médicinales et Alimentaires de Guinée (IRDPMAG), Dubréka, Guinea
| | - Benedicte Bertrand
- Unité Mixte de Recherche (UMR152) Pharmcochimie et biologie pour le développement (PHARMADEV), Université de Toulouse, French National Research Institue for Sustainable Development (IRD), UPS, Toulouse, France
| | - Philippe Batigne
- Unité Mixte de Recherche (UMR152) Pharmcochimie et biologie pour le développement (PHARMADEV), Université de Toulouse, French National Research Institue for Sustainable Development (IRD), UPS, Toulouse, France
| | - Agnes Coste
- Unité Mixte de Recherche (UMR152) Pharmcochimie et biologie pour le développement (PHARMADEV), Université de Toulouse, French National Research Institue for Sustainable Development (IRD), UPS, Toulouse, France
| | - Bernard Pipy
- Unité Mixte de Recherche (UMR152) Pharmcochimie et biologie pour le développement (PHARMADEV), Université de Toulouse, French National Research Institue for Sustainable Development (IRD), UPS, Toulouse, France
| | - Agnes Aubouy
- Unité Mixte de Recherche (UMR152) Pharmcochimie et biologie pour le développement (PHARMADEV), Université de Toulouse, French National Research Institue for Sustainable Development (IRD), UPS, Toulouse, France
- *Correspondence: Agnes Aubouy,
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Guillochon E, Fraering J, Joste V, Kamaliddin C, Vianou B, Houzé L, Baudrin LG, Faucher JF, Aubouy A, Houzé S, Cot M, Argy N, Taboureau O, Bertin GI. OUP accepted manuscript. J Infect Dis 2022; 225:2187-2196. [PMID: 35255125 PMCID: PMC9200161 DOI: 10.1093/infdis/jiac086] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/03/2022] [Indexed: 11/24/2022] Open
Abstract
Cerebral malaria (CM) is the severest form of Plasmodium falciparum infection. Children under 5 years old are those most vulnerable to CM, and they consequently have the highest risk of malaria-related death. Parasite-associated factors leading to CM are not yet fully elucidated. We therefore sought to characterize the gene expression profile associated with CM, using RNA sequencing data from 15 CM and 15 uncomplicated malaria isolates from Benin. Cerebral malaria parasites displayed reduced circulation times, possibly related to higher cytoadherence capacity. Consistent with the latter, we detected increased var genes abundance in CM isolates. Differential expression analyses showed that distinct transcriptome profiles are signatures of malaria severity. Genes involved in adhesion, excluding variant surface antigens, were dysregulated, supporting the idea of increased cytoadhesion capacity of CM parasites. Finally, we found dysregulated expression of genes in the entry into host pathway that may reflect greater erythrocyte invasion capacity of CM parasites.
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Affiliation(s)
- E Guillochon
- Université Paris Cité, MERIT, IRD, Paris, France
- Université Paris Cité, INSERM U1133, CNRS UMR 8251, Paris, France
| | - J Fraering
- Université Paris Cité, MERIT, IRD, Paris, France
| | - V Joste
- Université Paris Cité, MERIT, IRD, Paris, France
- Parasitology Laboratory, Hôpital Bichat - Claude-Bernard, APHP, Paris, France
- French Malaria Reference Center, Hôpital Bichat, APHP, Paris, France
| | - C Kamaliddin
- Cumming School of Medicine, The University of Calgary, Calgary, Alberta, Canada
| | - B Vianou
- Université Paris Cité, MERIT, IRD, Paris, France
- Institut de Recherche Clinique du Bénin, Cotonou, Bénin
| | - L Houzé
- Université Paris Cité, MERIT, IRD, Paris, France
| | - L G Baudrin
- Institut Curie Genomics of Excellence Platform, PSL Research University, Research Center, Institut Curie, Paris, France
| | - J F Faucher
- INSERM, Univ. Limoges, CHU Limoges, IRD, U1094 Tropical Neuroepidemiology, Institute of Epidemiology and Tropical Neurology, GEIST, Limoges, France
| | - A Aubouy
- Université de Toulouse, PHARMADEV, IRD, UPS, Toulouse, France
| | - S Houzé
- Université Paris Cité, MERIT, IRD, Paris, France
- Parasitology Laboratory, Hôpital Bichat - Claude-Bernard, APHP, Paris, France
- French Malaria Reference Center, Hôpital Bichat, APHP, Paris, France
| | - M Cot
- Université Paris Cité, MERIT, IRD, Paris, France
| | - N Argy
- Université Paris Cité, MERIT, IRD, Paris, France
- Parasitology Laboratory, Hôpital Bichat - Claude-Bernard, APHP, Paris, France
- French Malaria Reference Center, Hôpital Bichat, APHP, Paris, France
| | - O Taboureau
- Université Paris Cité, INSERM U1133, CNRS UMR 8251, Paris, France
| | - G I Bertin
- Correspondence: Gwladys I. Bertin, PhD, Université Paris Cité, MERIT, IRD, 4 avenue de l’Observatoire, 75006 Paris, France ()
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Brisset J, Kinkpé E, Bailly J, Ayédadjou L, Alao J, Dossou-Dagba I, Bertin G, Aubouy A, Houzé S, Faucher J. Coma non traumatique chez le jeune enfant au Bénin : tout tourne-t-il autour de la prise en charge du paludisme ? Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yalcindag E, Rougeron V, Elguero E, Arnathau C, Durand P, Brisse S, Diancourt L, Aubouy A, Becquart P, D'Alessandro U, Fontenille D, Gamboa D, Maestre A, Ménard D, Musset L, Noya O, Veron V, Wide A, Carme B, Legrand E, Chevillon C, Ayala FJ, Renaud F, Prugnolle F. Patterns of selection onPlasmodium falciparumerythrocyte-binding antigens after the colonization of the New World. Mol Ecol 2014; 23:1979-93. [DOI: 10.1111/mec.12696] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erhan Yalcindag
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
- Department of Botany and Zoology; Faculty of Science; Masaryk University; Kotlářská 2 611 37 Brno Czech Republic
| | - Virginie Rougeron
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
- Centre International de Recherches Médicales de Franceville (CIRMF); BP 769 Franceville Gabon
| | - Eric Elguero
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
| | - Céline Arnathau
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
| | - Patrick Durand
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
| | - Sylvain Brisse
- Institut Pasteur; Plate-forme Génotypage des Pathogènes et Santé Publique; 28 Rue du docteur Roux 75724 Paris France
| | - Laure Diancourt
- Institut Pasteur; Plate-forme Génotypage des Pathogènes et Santé Publique; 28 Rue du docteur Roux 75724 Paris France
| | - Agnes Aubouy
- Institut de Recherche pour le Développement (IRD); UMR152; Université Paul Sabatier; 35 Chemin des Maraîchers 31062 Toulouse France
| | - Pierre Becquart
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
| | | | - Didier Fontenille
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
| | - Dionicia Gamboa
- Instituto de Medicina Tropical Alexander Von Humboldt; Universidad Peruana Cayetano Heredia; AP 4314 Lima 100 Peru
| | - Amanda Maestre
- Grupo Salud y Comunidad; Facultad de Medicina; Universidad de Antioquía; Medellín Colombia
| | - Didier Ménard
- Molecular Epidemiology Unit; Pasteur Institute of Cambodia; 5 Boulevard Monivong - PO Box 983 Phnom Penh Cambodia
| | - Lise Musset
- Parasitology laboratory; Institut Pasteur de Guyane; BP6010 97306 Cayenne Cedex French Guiana
| | - Oscar Noya
- Centro para Estudios Sobre Malaria; Instituto de Altos Estudios en Salud “Dr. Arnoldo Gabaldón”-INH; Ministerio del Poder Popular para la Salud; Instituto de Medicina Tropical; Universidad Central de Venezuela; Caracas Venezuela
| | | | - Albina Wide
- Centro para Estudios Sobre Malaria; Instituto de Altos Estudios en Salud “Dr. Arnoldo Gabaldón”-INH; Ministerio del Poder Popular para la Salud; Instituto de Medicina Tropical; Universidad Central de Venezuela; Caracas Venezuela
| | - Bernard Carme
- Centre d'Investigation Clinique Epidémiologie Clinique Antilles; Guyane CIC-EC 802; Cayenne General Hospital; Cayenne French Guiana
| | - Eric Legrand
- Parasitology laboratory; Institut Pasteur de Guyane; BP6010 97306 Cayenne Cedex French Guiana
| | - Christine Chevillon
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
| | - Francisco J. Ayala
- Department of Ecology and Evolutionary Biology; University of California; Irvine CA 92697 USA
| | - François Renaud
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
| | - Franck Prugnolle
- MIVEGEC (Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle); UMR CNRS 5290/IRD 224; Université Montpellier 1; Université Montpellier 2; CHRU de Montpellier; 39 Avenue Charles Flahault 34295 Montpellier France
- Centre International de Recherches Médicales de Franceville (CIRMF); BP 769 Franceville Gabon
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Yalcindag E, Elguero E, Arnathau C, Durand P, Akiana J, Anderson TJ, Aubouy A, Balloux F, Besnard P, Bogreau H, Carnevale P, D'Alessandro U, Fontenille D, Gamboa D, Jombart T, Le Mire J, Leroy E, Maestre A, Mayxay M, Ménard D, Musset L, Newton PN, Nkoghé D, Noya O, Ollomo B, Rogier C, Veron V, Wide A, Zakeri S, Carme B, Legrand E, Chevillon C, Ayala FJ, Renaud F, Prugnolle F. Multiple independent introductions of Plasmodium falciparum in South America. Proc Natl Acad Sci U S A 2012; 109:511-6. [PMID: 22203975 PMCID: PMC3258587 DOI: 10.1073/pnas.1119058109] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The origin of Plasmodium falciparum in South America is controversial. Some studies suggest a recent introduction during the European colonizations and the transatlantic slave trade. Other evidence--archeological and genetic--suggests a much older origin. We collected and analyzed P. falciparum isolates from different regions of the world, encompassing the distribution range of the parasite, including populations from sub-Saharan Africa, the Middle East, Southeast Asia, and South America. Analyses of microsatellite and SNP polymorphisms show that the populations of P. falciparum in South America are subdivided in two main genetic clusters (northern and southern). Phylogenetic analyses, as well as Approximate Bayesian Computation methods suggest independent introductions of the two clusters from African sources. Our estimates of divergence time between the South American populations and their likely sources favor a likely introduction from Africa during the transatlantic slave trade.
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Affiliation(s)
- Erhan Yalcindag
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
| | - Eric Elguero
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
| | - Céline Arnathau
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
| | - Patrick Durand
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
| | - Jean Akiana
- Service Epidémiologie Moléculaire et Parasitaire, Département de la Médecine Préventive et des Essais Cliniques, Laboratoire National de Santé Publique, Brazzaville, 1 Kinshasa, Republic of the Congo
| | - Timothy J. Anderson
- Department of Genetics, Texas Biomedical Research Institute, San Antonio, TX 78245
| | - Agnes Aubouy
- Institut de Recherche pour le Développement–Unité Mixte de Recherche 152, Université Paul Sabatier, 31062 Toulouse, France
| | - François Balloux
- Medical Research Council Centre for Outbreak Analysis and Modelling, Department of Infectious Disease Epidemiology, Faculty of Medicine, Imperial College, London W2 1PG, United Kingdom
| | - Patrick Besnard
- Malaria Control Program, Société Nationale de Métallurgie (Sonamet), Lobito, Angola
| | - Hervé Bogreau
- Institute for Biomedical Research of the French Army and Unité de Recherche sur les Maladies Infectieuses et Tropicales Émergentes–Unité Mixte de Recherche 6236, Allée du Médecin Colonel Jamot, Marseille, Cedex 07, France
| | - Pierre Carnevale
- Institut de Recherche pour le Développement, 34394 Montpellier, France
| | - Umberto D'Alessandro
- Department of Parasitology, Institute of Tropical Medicine, 2000 Antwerp, Belgium
| | - Didier Fontenille
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
| | - Dionicia Gamboa
- Instituto de Medicina Tropical Alexander Von Humboldt, Universidad Peruana Cayetano Heredia, AP 4314, Lima 100, Peru
| | - Thibaut Jombart
- Medical Research Council Centre for Outbreak Analysis and Modelling, Department of Infectious Disease Epidemiology, Faculty of Medicine, Imperial College, London W2 1PG, United Kingdom
| | - Jacques Le Mire
- Malaria Control Program, Société Nationale de Métallurgie (Sonamet), Lobito, Angola
| | - Eric Leroy
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
- Unité Emergence des Pathologies Virales, Unité Mixte de Recherche 190, Institut de Recherche pour le Développement, Université de la Méditerranée, Centre International de Recherche médicale de Franceville BP 769 Franceville, Gabon
| | - Amanda Maestre
- Grupo Salud y Comunidad, Facultad de Medicina, Universidad de Antioquía, Medellín, Colombia
| | - Mayfong Mayxay
- Wellcome Trust–Mahosot Hospital–Oxford Tropical Medicine Research Collaboration, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | - Didier Ménard
- Molecular Epidemiology Unit, Pasteur Institute of Cambodia, 12152 Phnom Penh, Cambodia
| | - Lise Musset
- Parasitology Unit, Institut Pasteur de Guyane, BP6010, 97306 Cayenne Cedex, French Guiana
| | - Paul N. Newton
- Wellcome Trust–Mahosot Hospital–Oxford Tropical Medicine Research Collaboration, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao People's Democratic Republic
| | - Dieudonné Nkoghé
- Unité Emergence des Pathologies Virales, Unité Mixte de Recherche 190, Institut de Recherche pour le Développement, Université de la Méditerranée, Centre International de Recherche médicale de Franceville BP 769 Franceville, Gabon
| | - Oscar Noya
- Centro para Estudios Sobre Malaria, Instituto de Altos Estudios en Salud “Dr. Arnoldo Gabaldón”, Ministerio del Poder Popular para la Salud and Instituto de Medicina Tropical, Universidad Central de Venezuela, 2101 Maracay, Caracas, Venezuela
| | - Benjamin Ollomo
- Unité Emergence des Pathologies Virales, Unité Mixte de Recherche 190, Institut de Recherche pour le Développement, Université de la Méditerranée, Centre International de Recherche médicale de Franceville BP 769 Franceville, Gabon
| | - Christophe Rogier
- Institute for Biomedical Research of the French Army and Unité de Recherche sur les Maladies Infectieuses et Tropicales Émergentes–Unité Mixte de Recherche 6236, Allée du Médecin Colonel Jamot, Marseille, Cedex 07, France
| | - Vincent Veron
- Centre d'Investigation Clinique Epidémiologie Clinique Antilles, Guyane 802, Cayenne General Hospital, 97306 Cayenne, French Guiana
| | - Albina Wide
- Centro para Estudios Sobre Malaria, Instituto de Altos Estudios en Salud “Dr. Arnoldo Gabaldón”, Ministerio del Poder Popular para la Salud and Instituto de Medicina Tropical, Universidad Central de Venezuela, 2101 Maracay, Caracas, Venezuela
| | - Sedigheh Zakeri
- Malaria and Vector Research Group, Biotechnology Research Center, Pasteur Institute of Iran, 13164 Tehran, Iran; and
| | - Bernard Carme
- Centre d'Investigation Clinique Epidémiologie Clinique Antilles, Guyane 802, Cayenne General Hospital, 97306 Cayenne, French Guiana
| | - Eric Legrand
- Parasitology Unit, Institut Pasteur de Guyane, BP6010, 97306 Cayenne Cedex, French Guiana
| | - Christine Chevillon
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
| | - Francisco J. Ayala
- Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697
| | - François Renaud
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
| | - Franck Prugnolle
- Laboratoire Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle, Unité Mixte de Recherche 5290-224, Centre National de la Recherche Scientifique-Institut de Recherche pour le Développement-Université de Montpellier I-Université de Montpellier II, 34394 Montpellier Cedex 5, France
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Aubouy A, Dechavanne S, Dasseya R, Massougbodji A. [Value of rapid tests for diagnosis of malaria in Benin]. Med Trop (Mars) 2010; 70:485-489. [PMID: 21520652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Reliable diagnosis of malaria is essential in malaria endemic areas. The purpose of this study was to compare the performance of rapid diagnostic tests to that of the thick and thin blood smear techniques conventionally used for diagnosis of malaria. A total of 84 patients presenting malaria symptoms were included and tested for malaria. Results of blood smears and rapid tests performed blindly in external labs were compared with results of blood smears and PCR done in our reference laboratory. Sensitivity, specificity, positive and negative predictive value were determined using PCR as the gold standard. Results of the rapid diagnostic test were much better than those of the microscopic technique performed in external labs, particularly with regard to true positivity. The blood smear technique in external labs led to 12 false positive diagnoses and was associated with a lower positive predictive value than the rapid test: 58.6% vs. 85.7%. The sensitivity and specificity of the rapid test were also higher than those obtained in external laboratories using blood smear techniques: 90.0% and 95.3% respectively versus 85.0% and 81.2% respectively. The results of this study indicate that the rapid test is more reliable than microscopy and that its use would improve malaria diagnosis. Risks factors for false diagnosis and limitations of the different diagnostic techniques are discussed.
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Affiliation(s)
- A Aubouy
- UMR216 Mère et Enfant face aux Infections Tropicales, Institut de Recherche pour le Développement (IRD), laboratoire IRD/FSS/ISBA, Institut des Sciences Biomédicales Appliquées (ISBA)/Faculté des Sciences de la Santé (FSS), Cotonou, Bénin.
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Maïga O, Djimdé AA, Hubert V, Renard E, Aubouy A, Kironde F, Nsimba B, Koram K, Doumbo OK, Le Bras J, Clain J. A Shared Asian Origin of the Triple‐MutantdhfrAllele inPlasmodium falciparumfrom Sites across Africa. J Infect Dis 2007; 196:165-72. [PMID: 17538897 DOI: 10.1086/518512] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 01/26/2007] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Usefulness of sulfadoxine-pyrimethamine as first-line therapy for uncomplicated Plasmodium falciparum malaria and intermittent preventive treatment in pregnancy throughout sub-Saharan Africa is compromised by the spread of dhfr alleles associated with pyrimethamine resistance. A predominant haplotype associated with the N51I+C59R+S108N triple-mutant dhfr allele has been reported recently in 4 African countries. A more comprehensive picture of the evolution of this mutant allele in Africa is lacking. METHODS Seventy-five P. falciparum isolates carrying the wild-type dhfr allele and 204 carrying the triple-mutant dhfr allele from 11 African countries were selected. The genetic diversity of the chromosomes bearing these alleles was analyzed with 4 microsatellite markers closely linked to the dhfr gene. RESULTS Seventy-three different 4-locus haplotypes carrying the wild-type dhfr allele were found. By contrast, 175 (85%) of 204 isolates carrying the triple-mutant dhfr allele shared a unique haplotype, identical to the one identified in Thailand. For the remaining triple-mutant isolates and one isolate with the quadruple-mutant dhfr allele (N51I+C59R+S108N+I164L), haplotypes were closely related to the predominant haplotype by mutation or recombination. CONCLUSIONS Migration of parasites carrying an ancestral triple-mutant dhfr allele drives the spread of dhfr alleles associated with pyrimethamine resistance throughout West and Central Africa.
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Aubouy A, Mayombo J, Keundjian A, Bakary M, Le Bras J, Deloron P. Short report: lack of prediction of amodiaquine efficacy in treating Plasmodium falciparum malaria by in vitro tests. Am J Trop Med Hyg 2004; 71:294-6. [PMID: 15381809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
Amodiaquine (AQ) is currently a major candidate for new antimalarial combinations, although in vivo and in vitro tests have been rarely simultaneously investigated. The efficacy of AQ was assessed at the dose of 30 mg/kg in treating Plasmodium falciparum malaria attacks in 74 children from southeast Gabon, and the in vitro activity of monodesethylamodiaquine (MdAQ), the main metabolite of AQ, was measured against P. falciparum parasites isolated from these children. Treatment failures were observed in 40.5% of the children, while 5.4% of the isolates showed in vitro resistance to MdAQ. No relationship was observed between in vivo and in vitro susceptibility. The in vitro activities of MdAQ and chloroquine were correlated. The reasons for such disparities between in vivo and in vitro AQ activities are discussed and the issue of the validity of in vitro tests to measure AQ efficacy is raised.
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Affiliation(s)
- Agnes Aubouy
- Centre International de Recherches Médicales de Franceville, Unité de Parasitologie Médicale, Franceville, Gabon, France
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Aubouy A, Carme B. Plasmodium DNA contamination between blood smears during Giemsa staining and microscopic examination. J Infect Dis 2004; 190:1335-7. [PMID: 15346346 DOI: 10.1086/424529] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2004] [Accepted: 04/29/2004] [Indexed: 11/03/2022] Open
Abstract
Giemsa-stained blood smears are mainly used for microscopic examination to diagnose malaria. However, they may also be subjected to polymerase chain reaction (PCR) to confirm diagnosis or for retrospective studies requiring the analysis of old smears. We investigated the possibility of DNA contamination occurring during automated Giemsa staining or due to the failure to clean the oil-immersion objective during microscopic examination. We tested blood smears from uninfected, Plasmodium vivax-infected, and P. falciparum-infected patients. DNA contamination was observed after both staining and microscopy, although contamination was unpredictable during staining. These results are of utmost importance when smears are used for PCR.
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Affiliation(s)
- Agnes Aubouy
- Medical Parasitology and Mycology Laboratory, Research Team EA3593, Referral Hospital, Cayenne, French Guiana
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