Evaluation of Xpert MTB/RIF Assay for the Rapid Identification of TB and TB Rifampin Resistance in Pulmonary Tuberculosis Suspects

February 2, 2018 updated by: Cepheid

Evaluation of Xpert MTB/RIF Assay for the Rapid Identification of TB and TB Rifampin Resistance in HIV-Infected and HIV-Uninfected Pulmonary Tuberculosis Suspects

This observational Mycobacterium tuberculosis (MTB) diagnostics evaluation study is a longitudinal study of pulmonary TB suspects who are undergoing sputum evaluation for pulmonary TB. The sensitivity and specificity of the Xpert MTB/RIF (Mycobacterium tuberculosis/rifampin) assay performed on the first sputum collected for Xpert testing will be compared to gold standard conventional culture methods on two sputum specimens, in HIV-infected and HIV-uninfected participants.

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

992

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

    • California
      • San Francisco, California, United States, 94110
        • Ucsf Aids Ctu

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

HIV-1-infected and -uninfected men and women, 18 years and older, pulmonary TB suspects who have either a) smear positive sputum or b) clinical suspicion of pulmonary TB including one or more self-reported symptoms of cough, night sweats, weight loss, or fever. Within the 180 days prior to collection of the initial sputum sample, participants will have received none or fewer than 48 hours of TB treatment and, in those 48 hours, fewer than three doses of TB treatment.

Description

Inclusion Criteria:

  • Suspected pulmonary TB (more information on the criterion can be found in the protocol)
  • Men and women age equal to or greater than 18 years
  • Ability and willingness of candidate or legal guardian/representative to provide informed consent
  • Collection of two sputum samples for AFB smear and culture collected within 7 days prior to entry.
  • Availability of two samples for Xpert MTB/RIF testing collected within 7 days prior to entry.
  • Determination and/or documentation of HIV status
  • For HIV-positive candidates, a CD4+ cell count obtained within 45 days prior to study entry or drawn at the time of entry at any laboratory that has a CLIA certification or its equivalent.

Exclusion Criteria:

  • Either receipt of ≥48 cumulative hours OR three or more doses of anti-TB treatment within 180 days prior to completion of second sputum collection for Xpert testing
  • Receipt of more than 7 cumulative days of antibiotics intended for bacterial treatment that may have anti-tuberculosis activity, within the 14 days prior to first sputum collection
  • Active drug or alcohol use or dependence that, in the opinion of the site investigator, would interfere with adherence to study requirements

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

Cohorts and Interventions

Group / Cohort
HIV-infected and -uninfected individuals
HIV-infected and -uninfected individuals with suspected TB infection

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Proportion of all participants with Xpert MTB/RIF Assay MTB positive in sputum #1 who are AFB smear positive and MGIT culture positive for M.tuberculosis.
Time Frame: Week 0
Week 0
Proportion of all participants with Xpert MTB/RIF Assay MTB positive in sputum #1 who are AFB smear negative and MGIT culture positive for M.tuberculosis.
Time Frame: Week 0
Week 0
Proportion of US participants with Xpert MTB/RIF Assay MTB negative in sputum #1 who are MGIT culture negative for M.tuberculosis.
Time Frame: Week 0
Week 0

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Investigators

  • Study Chair: Cynthia Firnhaber, MD, University of Witwatersrand, South Africa

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 (Actual)

May 1, 2012

Primary Completion (Actual)

February 21, 2014

Study Completion (Actual)

February 21, 2014

Study Registration Dates

First Submitted

April 24, 2012

First Submitted That Met QC Criteria

April 26, 2012

First Posted (Estimate)

April 30, 2012

Study Record Updates

Last Update Posted (Actual)

February 6, 2018

Last Update Submitted That Met QC Criteria

February 2, 2018

Last Verified

February 1, 2018

More Information

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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