Improving the Diagnosis and Treatment of Smear-Negative Pulmonary And
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Stop TB Department Improving the HIV/AIDS Department diagnosis and HIV/AIDS, Tuberculosis and Malaria Cluster treatment of WORLD HEALTH ORGANIZATION 20 Av. Appia, CH-1211 Geneva 27, Switzerland smear-negative Website: http://www.who.int/tb Website: http://www.who.int/hiv pulmonary and extrapulmonary For further information about tuberculosis tuberculosis or other communicable diseases, please contact: among adults and Information Resource Centre HTM/STB World Health Organization adolescents 20 Av. Appia, CH-1211 Geneva 27, Switzerland E-mail: [email protected] Recommendations For further information about HIV/AIDS, please contact: for HIV-prevalent and Information Resource Centre resource-constrained HIV/AIDS Department, World Health Organization settings 20 av. Appia, CH-1211 Geneva 27, Switzerland E-mail: [email protected] WHO/HTM/TB/2007.379 WHO/HIV/2007.01 Improving the diagnosis and treatment of smear-negative pulmonary and extrapulmonary tuberculosis among adults and adolescents Recommendations for HIV-prevalent and resource-constrained settings STOP TB DEPARTMENT DEPARTMENT OF HIV/AIDS © World Health Organization 2007 All rights reserved. The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dotted lines on maps represent approximate border lines for which there may not yet be full agreement. The mention of specifi c companies or of certain manufacturers’ products does not imply that they are endorsed or recommended by the World Health Organization in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters. All reasonable precautions have been taken by the World Health Organization to verify the information contained in this publica- tion. However, the published material is being distributed without warranty of any kind, either expressed or implied. The respon- sibility for the interpretation and use of the material lies with the reader. In no event shall the World Health Organization be liable for damages arising from its use. Contents Acknowledgements iv Abbreviations v Part I. Improving the diagnosis and treatment of smear-negative tuberculosis 1 Background 3 Target audience 3 Process of formulation 3 Strength of the recommendations 4 Implementation and evaluation 4 Recommendations 5 Algorithms for the diagnosis of smear-negative tuberculosis 8 Part II. Simplifi ed and standardized clinical management guidelines for extrapulmonary tuberculosis 15 Background 17 Target audience 17 Diagnosis and management 17 Further reading 23 References 24 Annex. Protocol for operational evaluation of the revised recommendations and algorithms for improving the diagnosis of tuberculosis in HIV-prevalent settings 27 Background 29 Objectives of the evaluation 29 Purpose of the protocol 29 Hypotheses 30 Study design and procedure 30 References 36 iii Acknowledgements Prepared by TB (PAG) of KNCV, the German Leprosy and TB Relief Association and the Damien Founda- Members of the WHO Expert Group on Smear- tion have also provided their comments on the Negative TB: Getachew Aderaye (Addis Ababa earlier version. The document was reviewed by University, Ethiopia), Ludwig Apers (Institute of members of the Core Group of the global TB/ Tropical Medicine, Antwerp, Belgium), Leopold HIV Working Group of the Stop TB Partnership Blanc (World Health Organization, Switzerland), and the Strategic and Technical Advisory Group Amy Bloom (United States Agency for Interna- for Tuberculosis (STAG-TB) and the Strategic tional Development (USAID), United States of and Technical Advisory Committee for HIV America), Jermiah Chakaya (Ministry of Health, (STAC-HIV) of the World Health Organiza- Kenya), Liz Corbett (London School of Tropi- tion. cal Medicine and Hygiene, United Kingdom), Haileyesus Getahun (World Health Organiza- Valuable comments were also provided by the tion, Switzerland), Charlie Gilks (World Health following individuals: Raimond Armengol (Pan Organization, Switzerland), Jeroen van Gorkom American Health Organization), Ramzi Asfour (KNCV Tuberculosis Foundation, the Nether- (WHO Headquarters), Daniel Chin (WHO, lands), Mark Harrington (Treatment Action China), Mirtha Del Granado (Pan American Group, United States of America), Pierre-Yves Health Organization), Reuben Granich (Offi ce Norval (World Health Organization, Switzer- of the Global AIDS Coordinator, United States land), Paul Nunn (World Health Organiza- of America), Christy Hanson (USAID, United tion, Switzerland), Rick O’Brien (Foundation States of America), Michael Kimerling (Uni- for Innovative New Diagnostics, Switzerland), versity of Alabama, United States of America), T. Santha (Ministry of Health, India) and Jay Nani Nair (WHO Regional Offi ce for South-East Varma (United States Centers for Disease Con- Asia), Lisa Nelson (Centers for Disease Control, trol and Prevention, Thailand). United States of America), Wilfred Nkhoma (WHO Regional Offi ce for Africa), Pilar Ramon- Pardo (Pan American Health Organization), Acknowledgements Mario Raviglione (WHO Headquarters), Fabio Scano (WHO Headquarters), Akhiro Seita Useful and detailed feedback was obtained on (WHO Regional Offi ce for the Eastern Mediter- an earlier version of the document from more ranean), Sahu Suvanand (WHO, India), Patrick than 130 national tuberculosis and HIV pro- van der Stuyft (Institute of Tropical Medicine, gramme managers, WHO regional and country Belgium), Marco Vitoria (WHO Headquarters), staff, researchers, clinicians, nongovernmental Fraser Wares (WHO, India). organizations and other health workers from all regions through global web-based consultations. All leading international organizations work- Overall coordination ing on tuberculosis, including the International Union Against Tuberculosis and Lung Disease Haileyesus Getahun. (UNION), the Programme Advisory Group for iv Abbreviations AFB acid-fast bacillus CPT co-trimoxazole preventive therapy CXR chest X-ray ETB extrapulmonary tuberculosis HIV human immunodefi ciency virus IRIS immune reconstitution infl ammatory syndrome PCP Pneumocystis carinii pneumonia WHO World Health Organization v PART I Improving the diagnosis and treatment of smear- negative tuberculosis 1 PART I. IMPROVING THE DIAGNOSIS AND TREATMENT OF SMEAR-NEGATIVE TUBERCULOSIS Background management of smear-negative pulmonary and extrapulmonary tuberculosis. The recom- Rates of smear-negative pulmonary and mendations and algorithms are designed for extrapulmonary tuberculosis have been rising use by national tuberculosis and HIV/AIDS in countries with HIV epidemics. The mortality control programmes and service providers. rate among HIV-infected tuberculosis patients HIV-prevalent settings are defi ned as countries, is higher than that of noninfected tuberculosis subnational administration units (e.g. districts, patients, particularly for those with smear-neg- counties) or selected facilities (e.g. referral hos- ative pulmonary and extrapulmonary tubercu- pitals, drug rehabilitation centres) where the losis. Delayed diagnosis may be an important adult HIV prevalence rate among pregnant cause of excess mortality in people living with women is ≥1% or HIV prevalence among tuber- HIV who have smear-negative pulmonary and culosis patients is ≥5%. In those countries where extrapulmonary tuberculosis. In the absence national HIV prevalence is below 1%, national of rapid, simple, and accurate diagnostic tools tuberculosis and HIV control authorities should for smear-negative pulmonary and extrapul- identify and defi ne HIV-prevalent settings (sub- monary tuberculosis, diagnostic algorithms national administrative units or facilities) based have been recommended. Earlier algorithms on the epidemiology of the HIV epidemic and and recommendations have been developed the magnitude of HIV-associated tuberculo- through consensus and expert opinion, without sis, and develop appropriate guidance for the a fi rm evidence base. These algorithms extend a implementation of these recommendations. patient’s evaluation over a period of time, dur- The recommendations and revised algorithms ing which HIV-infected patients may die from are intended for immediate implementation in undiagnosed tuberculosis or from advanced sub-Saharan Africa and other HIV-prevalent HIV complications. The Stop TB Strategy now settings, as defi ned by national tuberculosis and emphasizes the timely diagnosis and treatment HIV control authorities, to guide the expedited of all cases of tuberculosis, including smear- diagnosis and management of tuberculosis. negative pulmonary and extrapulmonary tuber- culosis. The existing guidelines for diagnosis of smear- Process of formulation negative pulmonary tuberculosis were published In September 2005, WHO convened an expert by WHO in 2003 (1) and codifi ed in 2006 in group to review currently recommended the International standards for tuberculosis care approaches to the diagnosis of smear-negative (2), a publication of organizations, including tuberculosis in HIV-prevalent settings and to WHO, which are members of the Stop TB Part- propose revisions to existing WHO guidelines. nership. The International standards generally The Expert Group has reviewed existing evi- maintained the 2003 WHO recommendations,