- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01150552
Studies of Avian Influenza Transmission to Humans in Egypt
July 11, 2014 updated by: St. Jude Children's Research Hospital
Prospective Studies of Avian Influenza Transmission to Humans in Egypt
The main focus of the study is:
- To estimate seroprevalence of AI in poultry-exposed and non-exposed human populations.
- To estimate the incidence of AI in poultry-exposed and non-exposed human populations.
- To investigate risk factors associated with AI infections in occupationally-exposed poultry workers.
The secondary objectives of the study:
- To investigate patterns in transmission of AI to household contacts of AI clinical cases
- To isolate AI viruses from acute cases
- To monitor the pathogenicity and disease severity of AI viruses causing human infections
Study Overview
Status
Completed
Conditions
Detailed Description
This 4-year prospective cohort study to compare individuals with occupational exposure to poultry with non-poultry exposed adult controls for evidence of incident and previous infections with AI viruses.
At the start of this study, study staff will obtain informed consent, and a blood sample will be obtained from study volunteers to establish baseline levels of antibodies against avian influenza types H4-H12.
Subjects will be interviewed regarding their exposures, medical history, and behaviors using a close-ended questionnaire specifically tailored for this study.
After one year, study subjects will be interviewed again to note any changes in exposure variables.
At this time, another blood sample will be obtained and tested for any changes in antibodies' levels.
The same procedures will be repeated at the final visit after another year.
Exposed individuals will be selected from rural areas where poultry is commonly raised.
Non-exposed controls will be selected from urban neighborhoods in Cairo.
Study Type
Observational
Enrollment (Actual)
1000
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Giza, Egypt, 12311
- National Research Centre
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
2 years and older (Child, Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Probability Sample
Study Population
Exposed subjects will be enrolled at the rural areas of Egypt where poultry production is located.
Controls will be enrolled in urban Cairo.
Households will be selected from neighborhoods without live bird markets close to the location of the NRC.
All members of a household will be enrolled.
Cohort of exposed subjects will be assembled from villages from 3 governorates in this area as well as 2 governorates south of Cairo where human cases of AI were reported.
Hence, 5 villages will make up 5 field sites.
From each village, the team will enroll 150 individuals with exposure to poultry.
The control group, i.e., individuals not occupationally exposed to poultry, will be enrolled from urban Cairo, the capital of Egypt.
Description
Inclusion Criteria:
- Be willing to participate by signing a consent/assent form, completing the study questionnaire, and permitting the withdrawal of blood.
- Does not buy poultry from live bird markets (for controls only).
Exclusion Criteria:
- Any known immunosuppressive condition or immune deficiency disease (including HIV infection), or ongoing receipt of any immunosuppressive therapy.
- Any individual with unknown poultry exposure status, or who was exposed to poultry more than 5 years ago.
- Children who are less than 2 years old when baseline enrollment is performed.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
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Poultry exposed individuals
Any individual who had an occupational contact with poultry in the previous five years will be considered exposed.
Individuals working on poultry farms, poultry wet markets, or keeping limited numbers of poultry in their backyard, are considered exposed.
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Non-poultry exposed adult controls
Unexposed individuals must have no occupational exposure to poultry in their lifetime and must also not be exposed to poultry purchased from live bird markets.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Measure antibodies in sera collected from poultry-exposed and non-exposed individuals
Time Frame: 4 years
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Prevalence rates will be measured by the presence of antibodies against AI viruses of types H4-H12 using a microneutralization assay.
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4 years
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Draw 3 annual serum samples from each individual and record any increase in the antibody titers against AI viruses.
Time Frame: 4 years
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Incidence rates will be assessed based on a 2-fold increase of antibody titers between baseline and follow-up and between follow-up and the final visit.
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4 years
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Risk or protective factors correlated with infection will be measured using the enrollment questionnaire.
Time Frame: 4 years
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4 years
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Obtain nasal and naso-pharyngeal swabs from subjects reporting ILI symptoms and confirm the presence of influenza by a rapid test.
Time Frame: 4 years
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Obtain swabs from the household contacts of individuals with a confirmed influenza A infection and test them for the presence of influenza A viruses
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4 years
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To send RT-PCR positive specimens collected from subjects reporting ILI symptoms to the hospital in order to isolate and characterize the virus.
Time Frame: 4 years
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4 years
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Collect data on disease pathogenicity and severity of symptoms from subjects reporting ILI and obtain a blood sample to isolate and study peripheral blood mononuclear cells.
Time Frame: 4 years
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4 years
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Ghazi Kayali, Ph.D, St. Jude Children's Research Hospital
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
June 1, 2010
Primary Completion (Actual)
May 1, 2014
Study Completion (Actual)
May 1, 2014
Study Registration Dates
First Submitted
June 22, 2010
First Submitted That Met QC Criteria
June 24, 2010
First Posted (Estimate)
June 25, 2010
Study Record Updates
Last Update Posted (Estimate)
July 14, 2014
Last Update Submitted That Met QC Criteria
July 11, 2014
Last Verified
July 1, 2014
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- EGYFLU XPD09-211
- N01-AI-70005 (Other Identifier: NIAID Centers of Excellence for Influenza Research and Surveillance)
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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