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Czynniki gospodarza i pasożyta, które wpływają na podatność na infekcję i chorobę malarii podczas ciąży i wczesnego dzieciństwa w Ouelessebougou i 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....

Przegląd badań

Status

Rekrutacyjny

Warunki

Szczegółowy opis

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.

Typ studiów

Obserwacyjny

Zapisy (Szacowany)

15000

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Kontakt w sprawie studiów

Kopia zapasowa kontaktu do badania

Lokalizacje studiów

      • Bamako, Mali
        • Rekrutacyjny
        • Gabriel Toure Hospital
        • Kontakt:
      • Wolossébougou, Mali
        • Rekrutacyjny
        • Ouelessebougou Clinical Research Center
        • Kontakt:

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

1 dzień do 45 lat (Dziecko, Dorosły)

Akceptuje zdrowych ochotników

Tak

Płeć kwalifikująca się do nauki

Wszystko

Metoda próbkowania

Próbka bez prawdopodobieństwa

Badana populacja

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

Opis

  • 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.

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Modele obserwacyjne: COHORT
  • Perspektywy czasowe: PROSPECTIVE

Kohorty i interwencje

Grupa / Kohorta
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

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
Maternal, placental, parasite and host associated with resistence to malaria infection and diseases in children
Ramy czasowe: 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

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Sponsor

Śledczy

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

Publikacje i pomocne linki

Osoba odpowiedzialna za wprowadzenie informacji o badaniu dobrowolnie udostępnia te publikacje. Mogą one dotyczyć wszystkiego, co jest związane z badaniem.

Publikacje ogólne

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów (Rzeczywisty)

30 sierpnia 2010

Daty rejestracji na studia

Pierwszy przesłany

22 lipca 2010

Pierwszy przesłany, który spełnia kryteria kontroli jakości

22 lipca 2010

Pierwszy wysłany (Szacowany)

23 lipca 2010

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Rzeczywisty)

12 listopada 2026

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

10 listopada 2026

Ostatnia weryfikacja

17 czerwca 2026

Więcej informacji

Terminy związane z tym badaniem

Inne numery identyfikacyjne badania

  • 999910156
  • 10-I-N156

Plan dla danych uczestnika indywidualnego (IPD)

Planujesz udostępniać dane poszczególnych uczestników (IPD)?

NIE

Informacje o lekach i urządzeniach, dokumenty badawcze

Bada produkt leczniczy regulowany przez amerykańską FDA

Nie

Bada produkt urządzenia regulowany przez amerykańską FDA

Nie

Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .