Influenza in People With Normal and Weakened Immune Systems
|First Received Date ICMJE||September 20, 2007|
|Last Updated Date||November 27, 2013|
|Start Date ICMJE||September 2007|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00533182 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Influenza in People With Normal and Weakened Immune Systems|
|Official Title ICMJE||Influenza in the Non-immunocompromised and Immunocompromised Host|
This study will evaluate how the immune system responds to influenza infection and compare how the infection differs in patients with a weakened immune system versus those with a healthy immune system.
Patients at the NIH Clinical Center who are older than 2 years of age and who are diagnosed with influenza A or B may be eligible for this study. Patients with healthy immune systems and weakened immune systems are included.
Participants answer questions about how they are feeling and have a physical examination to evaluate their symptoms. Blood and nasal fluid are collected on the first day and then every other day for a total of 8 days. Nasal fluid is collected by either inserting a small tube in the nose and washing the nose with salt water and collecting the fluid obtained, or by rubbing the inside of the nose with a swab. Physical examinations are repeated on the days that blood and nasal fluid are collected.
Influenza viruses cause significant morbidity each year, and past epidemics and pandemics have caused significant mortality. The impact influenza has or could have on the increasing number of patients who are immunocompromised due to acute and chronic diseases as well as immunosuppressive therapies is largely unknown. Limited information is available about the innate immune response to influenza and how chronic illness and immunosuppression may affect the immune response to the virus in comparison to that seen in normal hosts.
We will evaluate both immunocompromised and non-immunocompromised (control group) patients from the local community, Washington Hospital Center, and the NIH Clinical Center. Patients with known or suspected influenza will be evaluated by recording their symptoms, collecting their blood and nasal fluid specimens, and isolating their viruses. Each patient s infection will be mapped by performing genomic analysis of the viral isolates collected during the patient s infection (which will include analysis of sequences known to confer resistance to antiviral medication), measuring cytokine levels in blood and nasal fluid, and measuring influenza-specific antibody responses. Correlation of these results with clinical symptoms and clinical outcomes will be evaluated. Elucidation of these responses and the genomic changes the virus may undergo during infection and treatment for influenza in both normal and immunocompromised patients may help to better understand the impact influenza has on the overall health of patients, as well as what strategies may be performed to better protect or treat patients during the emergence of a new pandemic.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Time Perspective: Prospective|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Estimated Enrollment ICMJE||1000|
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
To be included in the protocol-based study, participants must satisfy all of the following requirements:
Patients will not be enrolled in this study if the following criterion applies or is satisfied:
1. Any condition that, in the judgment of the investigator is a contraindication to protocol participation or impairs a volunteer s ability to give informed consent.
|Ages||2 Years and older|
|Accepts Healthy Volunteers||Yes|
|Location Countries ICMJE||United States|
|NCT Number ICMJE||NCT00533182|
|Other Study ID Numbers ICMJE||070229, 07-I-0229|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Institute of Allergy and Infectious Diseases (NIAID)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||March 2013|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP