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TerminatedNCT03922594Updated May 20, 2022

Surveillance of Zika-related Microcephaly in Sub-Saharan Africa and Asia

An observational study in Microcephaly and Congenital Infection, sponsored by Institut Pasteur. Terminated at 8 sites in 5 countries. Open to participants aged 0 Days to 2 Days. Per ClinicalTrials.gov, last updated 2022-05-20.

Sponsored by Institut Pasteur · Observational

Why this study was terminated
The disruptions due to the impact of the ongoing COVID-19 pandemic to the implementation of the study in each of the study sites, as well as to the coordination of the study at Institut Pasteur, prevented the completion of the study
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
150
Ages
0 Days to 2 Days
Sex
All
01

Study summary

This study will explore whether ZIKV is currently responsible for neurological complications, and particularly microcephaly, in Aedes-infested regions of Sub-Saharan Africa (SSA) and Asia. This will inform regional public health strategies, such as vaccination of women of child-bearing age. It will also demonstrate the public health impact of ZIKV infection and increase the understanding of other regional infectious (e.g. cytomegalovirus) causes of microcephaly.

Read the detailed description

This study will last for 2 years, and will include only new cases of microcephaly.

Surveillance will take place in large maternities in urban areas (standard procedure)

  • In each city, \~3000 live births per month will be monitored, so that on average one microcephaly will be diagnosed per month per city (i.e., 24 per city in 2 years)
  • Microcephaly is defined as less than -3 standard deviation (SD), according to the INTERGROWTH standards by age and sex with abnormal ultrasound and/or clinical examination.

Data collection (study activity)

  • A questionnaire with demographic, exposure and pregnancy details for all mothers Clinical exam and laboratory testing (standard procedure and study activity)
  • Various biological samples (e.g. blood, placenta) will be collected from mothers and newborns/fetuses and tested for presence of ZIKV, and for other infectious (e.g. rubella, cytomegalovirus) causes of microcephaly
  • Physical, neurological, hearing and visual examinations for all live births will be performed where possible.

Analysis and reporting (study activity)

o All results will be shared publically through conferences and peer-reviewed publications.

02

Conditions studied

  • Microcephaly
  • Congenital Infection

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03

In context

Microcephaly

22 studies on the registry are indexed under Microcephaly; 5 are open to participants now.

This study's enrollment of 150 is below the median of 232 across 16 observational studies indexed under Microcephaly.

Browse Microcephaly studies →

Lead sponsor

Institut Pasteur is the lead sponsor of 99 studies on the registry; 41 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
0 Days to 2 Days
Sexes eligible
All
Sampling method
Non-probability sample

Study population

Fetuses or newborns (still-born, medical abortions [China and Vietnam only] or alive) with microcephaly defined as head circumference ≤-3SD according to INTERGROWTH standards for gestational age and sex with abnormal ultrasound and/or clinical examination findings for newborns.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • All infants or fetuses with microcephaly, (defined as head circumference ≤-3SD according to INTERGROWTH standards for gestational age and sex, detected during the mother's pregnancy, or at the end of the mother's pregnancy at one of the participating maternities)
  • and with abnormal ultrasound and/or clinical examination findings for newborns.

Exclusion criteria

Exclusion Criteria:

  • Infants/fetuses with microcephaly whose mothers are under the age of 18 years,
  • or inability or refusal of mothers/ guardians to give .
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
150 participants (actual)
Target follow-up
2 Days
Patient registry
Yes

Groups and cohorts

  • Cameroon

    Live newborns with microcephaly defined as head circumference ≤-3SD according to INTERGROWTH standards for gestational age and sex with abnormal ultrasound and/or clinical examination findings for newborns

    Diagnostic Test: Differential diagnosis for infectious causes of microcephaly

  • China

    Fetuses or newborns (still-born, medical abortions or alive) with microcephaly defined as head circumference ≤-3SD according to INTERGROWTH standards for gestational age and sex with abnormal ultrasound and/or clinical examination findings for newborns

    Diagnostic Test: Differential diagnosis for infectious causes of microcephaly

  • Ivory Coast

    Live newborns with microcephaly defined as head circumference ≤-3SD according to INTERGROWTH standards for gestational age and sex and severely disproportionate length or weight according to INTERGROWTH standards for gestational age and sex with abnormal ultrasound and/or clinical examination findings for newborns

    Diagnostic Test: Differential diagnosis for infectious causes of microcephaly

  • Sri Lanka

    Live newborns with microcephaly defined as head circumference ≤-3SD according to INTERGROWTH standards for gestational age and sex with abnormal ultrasound and/or clinical examination findings for newborns

    Diagnostic Test: Differential diagnosis for infectious causes of microcephaly

  • Vietnam

    Fetuses or newborns (still-born, medical abortions or alive) with microcephaly defined as head circumference ≤-3SD according to INTERGROWTH standards for gestational age and sex with abnormal ultrasound and/or clinical examination findings for newborns

    Diagnostic Test: Differential diagnosis for infectious causes of microcephaly

Interventions

  • Diagnostic testDifferential diagnosis for infectious causes of microcephaly

    Zika virus, cytomegalovirus, rubella, toxoplasmosis

06

What researchers measure

Primary outcomes

  1. Incidence of microcephaly (per 10,000 live births)

    Incidence of microcephaly (per 10,000 live births)

    Time frame: At birth

  2. Proportion of microcephaly attributable to ZIKV

    Proportion of microcephaly attributable to Zika virus infection

    Time frame: At birth

  3. Proportion of microcephaly linked to other infectious etiologies

    Proportion of microcephaly linked to other infectious etiologies (non-ZIKV)

    Time frame: At birth

07

Study locations

8 sites
  • Central Hospital Maternity
    Yaoundé, Cameroon
  • Essos Hospital Centre Maternity
    Yaoundé, Cameroon
  • Guangzhou Women's and Children's Hospital
    Guangzhou, China
  • General Hospital Abobo-Sud
    Abidjan, Côte D'Ivoire
  • General Hospital of Yopougon-Attie
    Abidjan, Côte D'Ivoire
  • Castle Street Hospital for Women
    Colombo, Sri Lanka
  • De Soyza Hospital for Women
    Colombo, Sri Lanka
  • Tu Du Hospital
    Ho Chi Minh City, Vietnam
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from May 2019 to primary completion in Aug 2021, 27 months.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 17, 2019
First posted
Apr 22, 2019
StartActual
May 20, 2019
Primary completionActual
Aug 31, 2021
CompletionActual
Aug 31, 2021
Last update
May 20, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 20, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03922594
Lead sponsor
Institut Pasteur
Collaborators
Centre Pasteur du Cameroun, Guangzhou Women and Children's Medical Center, Institut Pasteur of Cote d'Ivoire, Pasteur Institute, Ho Chi Minh City, Tu Du Hospital, Perinatal Society of Sri Lanka, University of Colombo, University of Lausanne, University of Lausanne Hospitals, The University of Hong Kong, Ministry of Health of Sri Lanka, Central Hospital Maternity, Essos Hospital Center, Guangzhou Baiyun Maternal and Child Health Hospital, General Hospital of Yopougon-Attie, General Hospital Abobo-Sud, Castle Street Hospital for Women, De Soyza Hospital for Women
Responsible party
Sponsor
First posted
Apr 22, 2019
Start date
May 20, 2019
Primary completion
Aug 31, 2021
Completion
Aug 31, 2021
Last update
May 20, 2022

Study contacts

Arnaud Fontanet
principal investigator · Institut Pasteur

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Mar 2022. You cannot join it, but the record below documents what was studied.

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