1. Tuberculosis Case Finding With Combined Rapid Point-of-Care Assays (Xpert MTB/RIF and Determine TB LAM) in HIV-Positive Individuals Starting Antiretroviral Therapy in Mozambique
- Author
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Nurja A. Magid, Fabio Riccardi, Maria Cristina Marazzi, Marina Giuliano, Muhlavasse David, Archa Hassane, Fausto Ciccacci, Mauro Andreotti, Remigio Josè Mugunhe, Marco Floridia, Zita Sidumo, Elsa Mutemba, Junia Cebola, Leonardo Palombi, Horacio Sotomane, and Sandro Mancinelli
- Subjects
0301 basic medicine ,Microbiology (medical) ,Adult ,Lipopolysaccharides ,Male ,medicine.medical_specialty ,Tuberculosis ,Point-of-care testing ,Point-of-Care Systems ,030106 microbiology ,Antitubercular Agents ,HIV Infections ,Sensitivity and Specificity ,Mycobacterium tuberculosis ,03 medical and health sciences ,0302 clinical medicine ,Weight loss ,Internal medicine ,Antiretroviral Therapy, Highly Active ,HIV Seropositivity ,medicine ,Prevalence ,Humans ,030212 general & internal medicine ,Stage (cooking) ,Medical prescription ,Tuberculosis, Pulmonary ,Mozambique ,Lipoarabinomannan ,biology ,business.industry ,Sputum ,medicine.disease ,biology.organism_classification ,Infectious Diseases ,Molecular Diagnostic Techniques ,Point-of-Care Testing ,Immunology ,Female ,medicine.symptom ,business ,Algorithms - Abstract
BACKGROUND: Tuberculosis is a major health concern in several countries, and effective diagnostic algorithms for use in human immunodeficiency virus (HIV)-positive patients are urgently needed. METHODS: At prescription of antiretroviral therapy, all patients in 3 Mozambican health centers were screened for tuberculosis, with a combined approach: World Health Organization (WHO) 4-symptom screening (fever, cough, night sweats, and weight loss), a rapid test detecting mycobacterial lipoarabinomannan in urine (Determine TB LAM), and a molecular assay performed on a sputum sample (Xpert MTB/RIF; repeated if first result was negative). Patients with positive LAM or Xpert MTB/RIF results were referred for tuberculosis treatment. RESULTS: Among 972 patients with a complete diagnostic algorithm (58.5% female; median CD4 cell count, 278/μL; WHO HIV stage I, 66.8%), 98 (10.1%) tested positive with Xpert (90, 9.3%) or LAM (34, 3.5%) assays. Compared with a single-test Xpert strategy, dual Xpert tests improved case finding by 21.6%, LAM testing alone improved it by 13.5%, and dual Xpert tests plus LAM testing improved it by 32.4%. Rifampicin resistance in Xpert-positive patients was infrequent (2.5%). Among patients with positive results, 22 of 98 (22.4%) had no symptoms at WHO 4-symptom screening. Patients with tuberculosis diagnosed had significantly lower CD4 cell counts and hemoglobin levels, more advanced WHO stage, and higher HIV RNA levels. Fifteen (15.3%) did not start tuberculosis treatment, mostly owing to rapidly deteriorating clinical conditions or logistical constraints. The median interval between start of the diagnostic algorithm and start of tuberculosis treatment was 7 days. CONCLUSIONS: The prevalence of tuberculosis among Mozambican HIV-positive patients starting antiretroviral therapy was 10%, with limited rifampicin resistance. Use of combined point-of-care tests increased case finding, with a short time to treatment. Interventions are needed to remove logistical barriers and prevent presentation in very advanced HIV/tuberculosis disease.
- Published
- 2017