Intestinal Helminth InfectionNCT00342017
The Effect of Parasitic Worm Infections on the Immune Response to Tuberculosis Bacteria
An observational study of Intestinal Helminth Infection and Filarial Infection, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in India.
Trial summary
This study, sponsored by the National Institutes of Health and the Tuberculosis Research Centre in Chennai, India, will examine how helminth and filarial infections affect the immune response to mycobacteria (the bacteria that causes tuberculosis). Read more about this study
- Who is it for?
- Ages 6 to 65 years
- Conditions the study is for
- Intestinal Helminth Infection, Filarial Infection
- How many people
- 5,200 participants
- Where
- 1 siteIndia
- Study dates
- 20 May 2002to 2 Sep 2008
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 6 to 65 years
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Who may be able to join
- Ages 6-65
- Able to give informed consent (greater than 18 years)/parent's consent (less than 18 years) in case of children/young adults
- Both sexes providing women are neither pregnant nor breastfeeding
- Willingness to provide stool and blood for examination two times over a 6 month period
- No known active tuberculosis, cancer, AIDS or other immunosuppressive illness
Who cannot join
- Less than 6 years old or greater than 65 years old
- Pregnant or breastfeeding by history
- Known active tuberculosis, cancer, AIDS, other immunosuppressive illness. Active tuberculosis is defined as culture proven M. tuberculosis.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Immunological Consequences of Helminth and Mycobacterial Coinfection
This study, sponsored by the National Institutes of Health and the Tuberculosis Research Centre in Chennai, India, will examine how helminth and filarial infections affect the immune response to mycobacteria (the bacteria that causes tuberculosis). Helminths are parasitic worms that infect the gut, and filaria are worms that circulate in the blood and infect various tissues. The findings of this study may affect how tuberculosis is assessed in Chennai, where filarial and helminth infections are common in the population.
Patients between 6 and 65 years of age with helminth or filarial infections who do not have active tuberculosis, cancer, AIDS, or other immunosuppressive illness may be eligible for this study. Participants will be recruited from villages in the Chingleput District of Chennai, India.
Read more
Participants will complete a medical history and physical examination. They will have a blood test to determine red blood cell count and to detect filarial infection, a stool examination to detect helminth infection, and a tuberculin skin test for tuberculosis. Patients with a positive tuberculin test will be treated for tuberculosis and any filarial or helminth infections that may have been detected.
Patients whose tuberculin test is negative will be invited to participate in the second part of the study-to determine whether people with either filarial infections or helminth infections, or both, respond to tuberculosis bacteria in the same way as people who do not have these infections. Participants will undergo a review of their medical history, a physical examination, and a blood test to assess red blood cell levels and to look for evidence of filarial or helminth infection. They will then be randomly assigned to receive either albendazole and DEC (anti-helminth and anti-filarial drugs) or a placebo (look-alike tablets that do not contain an active ingredient). Two months later, patients will receive a second dose of the same tablets (placebo or active drug) they took previously, and after another 4 weeks they will be re-tested for tuberculosis. After 6 months (at the end of the study) all participants will receive anti-helminth and anti-filarial drugs and will have a repeat tuberculin skin test. Blood and stool samples will be collected twice in the 6-month period after the initial treatment to determine the levels of antibody against the parasites, to measure the level of infection with filaria, and to measure the level of red blood cells.
Read the detailed description
To determine if preexisting intestinal helminth infection or filarial infection alters the immune response to mycobacterial antigens or the clinical expression of tuberculosis, this study proposes to assess the skin test reactivity to tuberculin (PPD) in a community in which intestinal helminth infection, filarial infection and tuberculosis co-exist. Once baseline data are obtained, all those who are PPD negative (but who harbor helminth parasites) will be randomized to receive either anthelminthics or placebo twice over a six week period. One and 4 months following the last dose, change in PPD status will be assessed as will the intestinal and filarial parasite burden. By assessing these changes, the influence of intestinal helminth or filarial infection on the cellular immune response to Mycobacterium tuberculosis can be determined.
- Conditions
- Intestinal Helminth Infection, Filarial Infection
- Keywords
- Filarial Infections, Helminths, Tuberculosis, Filarial Infection
- Medical subject headings
- Tuberculosis
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted21 Jun 2006 (estimated)
- Study start20 May 2002
- Primary completion2 Sep 2008
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Intestinal Helminth InfectionStudies of the same condition, open and under way.
- More trials run by National Institute of Allergy and Infectious Diseases (NIAID)The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Enrolment
- 5,200 participants
Sponsor and investigators
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00342017
- Sponsor's protocol ID
- 999901261
- Other IDs
- 01-I-N261
- Status last verified
- 4 Aug 2009
- First submitted
- 19 Jun 2006
- Last updated
- 2 Jul 2017
- Results posted
- No
Publications
Actor JK, Shirai M, Kullberg MC, Buller RM, Sher A, Berzofsky JA. Helminth infection results in decreased virus-specific CD8+ cytotoxic T-cell and Th1 cytokine responses as well as delayed virus clearance. Proc Natl Acad Sci U S A. 1993 Feb 1;90(3):948-52. doi: 10.1073/pnas.90.3.948.
PubMed 8094248Baily GV. Tuberculosis prevention Trial, Madras. Indian J Med Res. 1980 Jul;72 Suppl:1-74. No abstract available.
PubMed 7005086Bentwich Z, Weisman Z, Moroz C, Bar-Yehuda S, Kalinkovich A. Immune dysregulation in Ethiopian immigrants in Israel: relevance to helminth infections? Clin Exp Immunol. 1996 Feb;103(2):239-43. doi: 10.1046/j.1365-2249.1996.d01-612.x.
PubMed 8565306
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Immunological Consequences of Helminth and Mycobacterial Coinfection
- ClinicalTrials.gov ID
- NCT00342017
- Acronym / sponsor ID
- 999901261
- Conditions
- Intestinal Helminth Infection, Filarial Infection
- Keywords
- Filarial Infections, Helminths, Tuberculosis, Filarial Infection
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 5,200 participants
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)US National Institutes of Health
- Study start
- 20 May 2002
- Primary completion
- 2 Sep 2008 (actual)
- First posted
- 21 Jun 2006 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study, sponsored by the National Institutes of Health and the Tuberculosis Research Centre in Chennai, India, will examine how helminth and filarial infections affect the immune response to mycobacteria (the bacteria that causes tuberculosis). Helminths are parasitic worms that infect the gut, and filaria are worms that circulate in the blood and infect various tissues. The findings of this study may affect how tuberculosis is assessed in Chennai, where filarial and helminth infections are common in the population.
Patients between 6 and 65 years of age with helminth or filarial infections who do not have active tuberculosis, cancer, AIDS, or other immunosuppressive illness may be eligible for this study. Participants will be recruited from villages in the Chingleput District of Chennai, India.
Participants will complete a medical history and physical examination. They will have a blood test to determine red blood cell count and to detect filarial infection, a stool examination to detect helminth infection, and a tuberculin skin test for tuberculosis. Patients with a positive tuberculin test will be treated for tuberculosis and any filarial or helminth infections that may have been detected.
Patients whose tuberculin test is negative will be invited to participate in the second part of the study-to determine whether people with either filarial infections or helminth infections, or both, respond to tuberculosis bacteria in the same way as people who do not have these infections. Participants will undergo a review of their medical history, a physical examination, and a blood test to assess red blood cell levels and to look for evidence of filarial or helminth infection. They will then be randomly assigned to receive either albendazole and DEC (anti-helminth and anti-filarial drugs) or a placebo (look-alike tablets that do not contain an active ingredient). Two months later, patients will receive a second dose of the same tablets (placebo or active drug) they took previously, and after another 4 weeks they will be re-tested for tuberculosis. After 6 months (at the end of the study) all participants will receive anti-helminth and anti-filarial drugs and will have a repeat tuberculin skin test. Blood and stool samples will be collected twice in the 6-month period after the initial treatment to determine the levels of antibody against the parasites, to measure the level of infection with filaria, and to measure the level of red blood cells.
Detailed description
To determine if preexisting intestinal helminth infection or filarial infection alters the immune response to mycobacterial antigens or the clinical expression of tuberculosis, this study proposes to assess the skin test reactivity to tuberculin (PPD) in a community in which intestinal helminth infection, filarial infection and tuberculosis co-exist. Once baseline data are obtained, all those who are PPD negative (but who harbor helminth parasites) will be randomized to receive either anthelminthics or placebo twice over a six week period. One and 4 months following the last dose, change in PPD status will be assessed as will the intestinal and filarial parasite burden. By assessing these changes, the influence of intestinal helminth or filarial infection on the cellular immune response to Mycobacterium tuberculosis can be determined.
Study design
Who may qualify
- Ages
- 6 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (5 listed)
- Ages 6-65
- Able to give informed consent (greater than 18 years)/parent's consent (less than 18 years) in case of children/young adults
- Both sexes providing women are neither pregnant nor breastfeeding
- Willingness to provide stool and blood for examination two times over a 6 month period
- No known active tuberculosis, cancer, AIDS or other immunosuppressive illness
Key exclusion criteria (3 listed)
- Less than 6 years old or greater than 65 years old
- Pregnant or breastfeeding by history
- Known active tuberculosis, cancer, AIDS, other immunosuppressive illness. Active tuberculosis is defined as culture proven M. tuberculosis.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jul 2017.
- Background: PubMed 8094248Actor JK, Shirai M, Kullberg MC, Buller RM, Sher A, Berzofsky JA. Helminth infection results in decreased virus-specific CD8+ cytotoxic T-cell and Th1 cytokine responses as well as delayed virus clearance. Proc Natl Acad Sci U S A. 1993 Feb 1;90(3):948-52. doi: 10.1073/pnas.90.3.948.
- Background: PubMed 7005086Baily GV. Tuberculosis prevention Trial, Madras. Indian J Med Res. 1980 Jul;72 Suppl:1-74. No abstract available.
- Background: PubMed 8565306Bentwich Z, Weisman Z, Moroz C, Bar-Yehuda S, Kalinkovich A. Immune dysregulation in Ethiopian immigrants in Israel: relevance to helminth infections? Clin Exp Immunol. 1996 Feb;103(2):239-43. doi: 10.1046/j.1365-2249.1996.d01-612.x.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Intestinal Helminth Infection and Filarial Infection, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in India.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Jul 2017. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in India. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00342017, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Jul 2017.