Nanodisk-MS Assay for the Diagnosis of Active Pulmonary and Extrapulmonary Tuberculosis in Hospitalized Patients

Detection of Circulating Mycobacterium Tuberculosis Antigen Peptides for the Diagnosis of Active Pulmonary and Extrapulmonary Tuberculosis in Hospitalized Patients

Diagnosis and treatment of tuberculosis are often delayed in hospitalized patients, leading to worse outcomes. Rapid diagnosis of tuberculosis currently relies on microscopy and molecular techniques, which have limitations including low sensitivity and high cost.Highly sensitive diagnostic technique is needed for more accurate rapid diagnosis of tuberculosis to aid earlier initiation of antituberculous therapy. Detection of Mycobacterium tuberculosis (MTB) antigens in the bloodstream can potentially allow early diagnosis of tuberculosis. This study aims to evaluate the diagnostic performance of a novel assay using nanotechnology to detect MTB antigens in patients admitted to hospital with suspected pulmonary and/or extrapulmonary tuberculosis. Blood will be taken from eligible patients, and will be sent to the School of Biological and Health Systems Engineering, Arizona State University, for detection of 10-kDa culture filtrate protein (CFP-10) and the 6 kDa early secretory antigenic target (ESAT-6), two antigens specific for MTB, using the Nanodisk-MS assay. Investigations, including microscopy, culture, MTB polymerase chain reaction (PCR), and imaging, will be performed for diagnosis of tuberculosis. The diagnostic performance of Nanodisk-mass spectrometry (MS) assay will be evaluated.

Inclusion Criteria:

• Adult patients aged 18 or above,
• Assessed by an Infectious Diseases physician to have clinical and/or radiological suspicion of pulmonary and/or extrapulmonary TB.

Exclusion Criteria:

• Refusal to consent from patients or next of kins for incompetent patients.