Exogenous Reinfection of Tuberculosis in Taiwan

NCT ID: NCT00173433

Last Updated: 2014-12-09

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

150 participants

Study Classification

OBSERVATIONAL

Study Start Date

2005-08-31

Study Completion Date

2006-07-31

Brief Summary

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we hypothesize that exogenous reinfection is very important in the Taiwan endemic. Therefore, we design a series of studies to evaluate the individual contribution of exogenous reinfection and endogenous reactivation in the Taiwan endemic, and to realize the impact of exogenous reinfection. First, we will identify the patients with TB relapse after complete treatment. The M. tuberculosis isolates responsible for their initial and recurrent episodes will then be genotyped to clarify the percentage of exogenous reinfection and endogenous reinfection.

Detailed Description

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Tuberculosis (TB) remains the most important infectious disease in the world. In Taiwan, the incidence of TB increased in recent years. The failure of control implies the necessity to reevaluate the epidemiology of Mycobacterium tuberculosis. It is widely thought that most cases of TB are caused by reactivation of a latent infection. Treatment programs have therefore focused on cure rates rather than tracking of additional cases. But recent studies showed that exogenous reinfection plays an important role in the development of TB. In addition, it seems that the higher the local incidence, the more important exogenous reinfection is. The question of exogenous reinfection versus endogenous reactivation has an impact on the distribution of resources for the prevention and treatment of TB. Based on these evidences, we hypothesize that exogenous reinfection is very important in the Taiwan endemic. Therefore, we design a series of studies to evaluate the individual contribution of exogenous reinfection and endogenous reactivation in the Taiwan endemic, and to realize the impact of exogenous reinfection. First, we will identify the patients with TB relapse after complete treatment. The M. tuberculosis isolates responsible for their initial and recurrent episodes will then be genotyped to clarify the percentage of exogenous reinfection and endogenous reinfection.

Conditions

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Tuberculosis

Keywords

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tuberculosis relapse reinfection reactivation dormancy tuberculin skin test

Study Groups

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Culture-confirmed relapse of TB

Patients who have a recurrent episode of culture-confirmed TB after completion of treatment for the first episode of culture-confirmed TB

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

* culture-proven tuberculosis with recurrence
Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Taiwan University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Jann-Yuan Wang, MD

Role: PRINCIPAL_INVESTIGATOR

National Taiwan University Hospital

Locations

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National Taiwan University Hospital

Taipei, , Taiwan

Site Status

Countries

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Taiwan

References

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Other Identifiers

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9461700627

Identifier Type: -

Identifier Source: org_study_id