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Gastheer- en parasietfactoren die de vatbaarheid voor malaria-infectie en -ziekte tijdens de zwangerschap en vroege kinderjaren beïnvloeden in Ouelessebougou en Bamako, Mali

Malaria caused by Plasmodium falciparum continues to be a global problem with devastating consequences. A greater understanding of the immunologic and parasitologic factors associated with infection and disease is badly needed; and will accelerate the development of highly protective vaccines for both mothers and children. Pregnancy malaria is associated with low birth weight, maternal anemia, and gestational hypertension, and both inflammation and the fetal response to infection may contribute to these poor outcomes. Childhood malaria is a major cause of mortality, and we have found that its risk is related to in utero exposure to pregnancy malaria, as well as other host factors like iron status and constitutive cytokine levels. Pregnancy malaria is caused by a distinct parasite binding phenotype, and as our primary hypothesis in this study we speculate that severe childhood malaria parasites may also have distinct features. A longitudinal cohort study will be conducted in Ouelessebougou, Mali, an area of intense seasonal transmission. Up to 2000 pregnant women and their infants and 2000 children aged 0-3 years will be enrolled and followed to age 5 years, with clinical evaluation and periodic venous and peripheral blood samples being obtained. In addition, up to 3000 febrile hospitalized and non-hospitalized children up to 10 years ofd age will be enrolled at the Ouelessebougou district health centers or the Gabriel Toure Pediatric Hospital in Bamako, Mali, with acute and convalescent samples being obtained and 500 pregnant women enrolled at the health centers and hospital in Ouelessebougou district or the Gabriel Toure Hospital in Bamako for a case-control study on pregnancy malaria and preeclampsia. Up to 1000 children originally enrolled at birth and completed the "pregnant women and their newborns study" will be re-enrolled and followed for up to 10 years as they age from later childhood through adolescence to early adulthood. Clinical, parasitologic and host response (including immunologic) endpoints will be analyzed using appropriate statistical methods, including possible confounders, to determine factors associated with infection and disease in pregnant women and young children....

Studie Overzicht

Toestand

Werving

Conditie

Gedetailleerde beschrijving

Malaria caused by Plasmodium falciparum continues to be a global problem with devastating consequences. A greater understanding of the immunologic and parasitologic factors associated with infection and disease is badly needed; and will accelerate the development of highly protective vaccines for both mothers and children. Pregnancy malaria is associated with low birth weight, maternal anemia, and gestational hypertension, and both inflammation and the fetal response to infection may contribute to these poor outcomes. Childhood malaria is a major cause of mortality, and we have found that its risk is related to in utero exposure to pregnancy malaria, as well as other host factors like iron status and constitutive cytokine levels. Pregnancy malaria is caused by a distinct parasite binding phenotype, and as our primary hypothesis in this study we speculate that severe childhood malaria parasites may also have distinct features. A longitudinal cohort study will be conducted in Ouelessebougou, Mali, an area of intense seasonal transmission. Up to 2000 pregnant women and their infants and 2000 children aged 0-3 years will be enrolled and followed to age 5 years, with clinical evaluation and periodic venous and peripheral blood samples being obtained. In addition, up to 3000 febrile hospitalized and non-hospitalized children up to 10 years ofd age will be enrolled at the Ouelessebougou district health centers or the Gabriel Toure Pediatric Hospital in Bamako, Mali, with acute and convalescent samples being obtained and 500 pregnant women enrolled at the health centers and hospital in Ouelessebougou district or the Gabriel Toure Hospital in Bamako for a case-control study on pregnancy malaria and preeclampsia. Up to 1000 children originally enrolled at birth and completed the "pregnant women and their newborns study" will be re-enrolled and followed for up to 10 years as they age from later childhood through adolescence to early adulthood. Clinical, parasitologic and host response (including immunologic) endpoints will be analyzed using appropriate statistical methods, including possible confounders, to determine factors associated with infection and disease in pregnant women and young children.

Studietype

Observationeel

Inschrijving (Geschat)

15000

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Contact Back-up

Studie Locaties

      • Bamako, Mali
        • Werving
        • Gabriel Toure Hospital
        • Contact:
      • Wolossébougou, Mali
        • Werving
        • Ouelessebougou Clinical Research Center
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

1 dag tot 45 jaar (Kind, Volwassen)

Accepteert gezonde vrijwilligers

Ja

Geslachten die in aanmerking komen voor studie

Allemaal

Bemonsteringsmethode

Niet-waarschijnlijkheidssteekproef

Studie Bevolking

Pregnant women presenting for antenatal consultations and delivery and their newborns; children aged 0-3 years in Ouelessebougou and Febrile children ages 0-10 years hospitalized and non-hospitalized in Ouelessebougou or the Pediatric service of Gabriel Toure Hospital in Bamako; Re-enrollees who were originally enrolled at birth and completed the Pregnant Women and Newborn Cohort

Beschrijving

  • INCLUSION CRITERIA:

A study participant must satisfy the following criteria to be or have been enrolled in this study:

  1. Pregnant women aged 15-45 years and their newborn infants who are residents of the district of Ouelessebougou for at least one year at the time of enrollment (cohort completed clinical follow up; sample and data analysis ongoing); OR
  2. Children who previously participated in the 1st cohort of "pregnant women and their newborn infants", OR
  3. Children aged 3 years or less, who are residents of the district of Ouelessebougou for at least one year at the time of enrollment (cohort completed clinical follow up; sample and data analysis ongoing), OR
  4. Febrile hospitalized children (aged 0-10 years), including those with positive and negative blood smears for P. falciparum in Ouelessebougou or the pediatric service of Gabriel Toure Hospital in Bamako. Febrile non-hospitalized children (aged 0-10 years) with non-severe malaria will be recruited at outpatient clinics in Ouelessebougou district health hospital and nearby facilities, with no chronic or serious illness.
  5. Pregnant women aged 15-25 in Ouelessebougou district health centers or maternity unit of Gabriel Toure Hospital in Bamako and for a case-control study of pregnancy malaria and preeclampsia. Cases include women with signs/symptoms of preeclampsia. Control pregnant women without signs/symptoms of preeclampsia will be recruited sequentially after identification of individual cases, matched for parity, age (+/-2 years) and pregnancy trimester.(cohort completed clinical follow up; sample and data analysis ongoing)
  6. The study participant or parent/guardian understands the study and gives informed consent for participation of themselves and/or their child, and agrees to have samples stored.

EXCLUSION CRITERIA:

A participant will be excluded from the study if any one or more of the following criteria are met:

  1. Chronic, debilitating illness, other than malaria, determined by history and physical examination of mother or study participant.
  2. Conditions that in the judgment of the investigator could increase the risk to the volunteer.
  3. History of previous participation in a malaria vaccine trial.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Observatiemodellen: COHORT
  • Tijdsperspectieven: PROSPECTIVE

Cohorten en interventies

Groep / Cohort
Children Ages 0-3 years

Children aged 0-3 years in Ouelessebougou

Febrile Hospitalized Children

Febrile hospitalized children aged 0-10 years in Ouelessebougou or the Pediatric service of Gabriel Toure Hospital in Bamako

Later Childhood and Adolescence

Re-enrollees who were originally enrolled at birth and completed the Pregnant Women and Newborn Cohort

Non-Hospitalized Children

Febrile non-hospitalized children aged 0-10 years in Ouelessebougou or the Pediatric service of Gabriel Toure Hospital in Bamako

Pregnant Women + Newborns

Pregnant women presenting for antenatal consultations and delivery and their newborns

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Maternal, placental, parasite and host associated with resistence to malaria infection and diseases in children
Tijdsspanne: up to 5 years for infants and children

To assess the relationship between malaria exposure during pregnancy and maternal and fetal outcomes; and to determine factors (maternal, placental, parasite, and host) associated with susceptibility or resistance to malaria infection and diseases in children

up to 5 years for infants and children

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Onderzoekers

  • Hoofdonderzoeker: Patrick E Duffy, M.D., National Institute of Allergy and Infectious Diseases (NIAID)

Publicaties en nuttige links

De persoon die verantwoordelijk is voor het invoeren van informatie over het onderzoek stelt deze publicaties vrijwillig ter beschikking. Dit kan gaan over alles wat met het onderzoek te maken heeft.

Algemene publicaties

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

30 augustus 2010

Studieregistratiedata

Eerst ingediend

22 juli 2010

Eerst ingediend dat voldeed aan de QC-criteria

22 juli 2010

Eerst geplaatst (Geschat)

23 juli 2010

Updates van studierecords

Laatste update geplaatst (Werkelijk)

12 november 2026

Laatste update ingediend die voldeed aan QC-criteria

10 november 2026

Laatst geverifieerd

17 juni 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • 999910156
  • 10-I-N156

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .