why can’t we eliminate tuberculosis? - lung...dye et al. ann rev pub health 2013; 34: 271-286 ....
TRANSCRIPT
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Why can’t we eliminate tuberculosis?
Neil W. Schluger, M.D.
Professor of Medicine, Epidemiology and Environmental Health Sciences
Columbia University
Chief Scientific Officer
World Lung Foundation
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Current trajectory of the global TB epidemic
year
Dye et al. Ann Rev Pub Health 2013; 34: 271-286
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What we need to do to eliminate tuberculosis
• Invest in public health
• Invest in research
• Embrace new ideas and new technology
• Take MDR-TB seriously
• Stop doing stupid stuff
• Speak with a louder voice
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What we need to do to eliminate tuberculosis
• Invest in public health
• Invest in research
• Embrace new ideas and new technology
• Take MDR-TB seriously
• Stop doing stupid stuff
• Speak with a louder voice
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Invest in public health, with money, effort and energy
• Better surveillance
• Improve access to care
• Insure drug supply
• Do a better job of monitoring and encouraging adherence to therapy
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Notifications of TB cases have stabilized in recent years, and in 2013 represented 64% (range, 61–66%) of estimated incident cases. The gap between notifications and incident cases – an estimated total of 3.3 million cases – can be explained by a mixture of underreporting of diagnosed TB cases (for example, failure to notify cases diagnosed in the private sector) and under-diagnosis due to poor access to health care and/or failure to detect cases when people visit health care facilities. Major efforts are needed to ensure that all cases are detected, notified to national surveillance systems, and treated according to international standards.
WHO Global TB Report 2014, pg. 39
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WHO, Global TB Report 2014
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Costs of tuberculosis care as a percentage of annual income
Tanimura et al. Eur Resp J 2014; 43: 1763-1775
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Financial coping strategies of tuberculosis patients
Tanimura et al. Eur Resp J 2014; 43: 1763-1775
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MMWR 2013; 62: 398
Drug shortages
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A tale of two cities: New York and London
TB Incidence 2013: 8.6/100,000 Source: NYC DOHMH
TB Incidence 2013: 37/100,000 Source: Public Health England
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A tale of two countries: U.S. and South Korea
TB, Republic of Korea, 1990-2013
TB Incidence 2013: 97/100,000 Source: WHO
TB Incidence 2013: 3.1/100,000
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Turning the tide--TB control in New York
• Implementation of
directly observed
therapy (DOT)
– Public health advisors
– Rebuild TB clinics
• Infection control
• Use of standardized
regimens for treatment
• $40 million annually
from CDC
Frieden et al. N Eng J Med 1995; 333: 229-233
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What we need to do to eliminate tuberculosis
• Invest in public health
• Invest in research
• Embrace new ideas and new technology
• Take MDR-TB seriously
• Stop doing stupid stuff
• Speak with a louder voice
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TAG Report 2014
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TAG Report 2014
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TAG Report 2014
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TAG Report 2014
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Deaths 1.5 million 1.6 million 0.62 million 0
TAG Report 2014
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The cost of underinvestment in TB research
• Only 2 new drugs approved in 40 years
– In that time period, HIV infection has become manageable, and hepatitis C infection has become curable.
• No prospect of approval of a more effective vaccine in the next 10 years
• In most places in the world, TB is diagnosed the same way it was diagnosed over 120 years ago
• The pace of clinical trials is agonizingly slow
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Drugs in the clinical pipeline for the
world’s leading causes of mortality
Drugs in clinical development:
- Heart disease and stroke: >200
- COPD: >50
- Antibacterials and antivirals: 394 (drugs and vaccines)
- (“124 for pneumonia and TB”)
- Cancer: 800
- Lung Cancer: 121
- Breast Cancer: 111
- HIV/AIDS: 44 (includes vaccines)
- Diabetes: 180
- Anti-tuberculosis: 5-8
- Anti-malarials: 6
Leading causes of global mortality:
1. Ischemic heart disease
2. Stroke
3. COPD
4. Lower respiratory infection
5. Lung cancer
6. HIV/AIDS
7. Diarrhea
8. Road traffic accidents
9. Diabetes
10.Tuberculosis
11.Malaria
Sources: The Global Burden of Disease Report
The Pharmaceutical Research and Manufacturers of America (www.pharma.org), accessed Feb. 25, 2015
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TB trials are too slow
2500 study subjects Trial initiated 2007
Paper published 2014
8000 study subjects Trial initiated 2001
Paper published 2011
Why so slow? Endpoints are the same as those used since the original BMRC streptomycin trial in 1948, and clinical trials capacity is limited.
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What we need to do to eliminate tuberculosis
• Invest in public health
• Invest in research
• Embrace new ideas and new technology
• Take MDR-TB seriously
• Stop doing stupid stuff
• Speak with a louder voice
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The TB community’s attitude towards new technology?
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Lancet 2014; 383: 424-435
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Xpert MTB/RIF
• What it does do:
– Diagnoses TB and determines susceptibility to rifampin accurately and rapidly
• What it does not do:
– Fix your TB control program
– Cure cancer
– Achieve world peace
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Interventions and their effect on TB cases
Dye et al. Ann Rev Pub Health 2013; 34: 271-286
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What we need to do to eliminate tuberculosis
• Invest in public health
• Invest in research
• Embrace new ideas and new technology
• Take MDR-TB seriously
• Stop doing stupid stuff
• Speak with a louder voice
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WHO 2010 Global Report
Total MDR cases:
480,000
WHO Global TB Report, 2014
Distribution and prevalence of MDR-TB
New cases Retreatment cases
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MDR-TB in Africa: the more you look, the more you find
Underreported Threat of MDR TB in Africa
Report published in 2004 have MDR TB rates >2.0% of all
combined TB cases. This fi nding suggests that completing
DRSs for all or most countries in the AFRO region is ur-
gently needed and that the MDR TB threat in Africa could
be much higher than originally assessed by WHO in its
previous report in 2004. Drug-resistant strains, along with
HIV/AIDS, are causing the biggest challenge to effi cient
management and control of TB.
The lower rates of MDR TB in Africa, when compared
with rates in Eastern Europe or South America, could be
Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 14, No. 9, September 2008 1349
Table 2. Descriptive statistics for country-specific MDR rates an d other TB-related factors, Africa*
Average, presurvey years (1995 to survey year)
Average, postsurvey years (year after survey to 2005)
Wilcoxon signed rank test†
Factor No., mean,
median Range SDNo., mean,
median Range SDZ-score, p
value‡
MDR rates 39, 2.21, 1.9 0.0–5.8 1.2
Incidence rate/100,000/ y 39, 116, 109 22–228 40.6 33, 152, 150 25–308 70.2 –3.92, 0.0001§
Case detection rate (new ss+) 39, 47.2, 49.8 8.2–86.0 22.4 32, 55.5, 56.2 13.6–112.2 27.5 –1.52, 0.130
Treatment indicators
Cured 36, 50.9, 52.3 17.1–74.6 14.2 32, 56.2, 59.0 16.6–78.4 14.5 –3.58, 0.0001§
Completed 39, 14.3, 12.4 3.1–47.4 9.8 32, 13.9, 11.1 1.3–38.5 8.9 1.27, 0.206
Died 36, 6.7, 6.1 2.6–19.5 3.3 32, 7.4, 7.2 0.7–17.1 3.5 –0.36, 0.721
Failed 36, 1.8, 1.6 0.0–7.8 1.5 32, 1.7, 1.3 0.2–5.3 1.2 –0.34, 0.738
Defaulted 36, 14.1, 13.2 4.4–41.4 6.8 32, 11.9, 10.9 2.6–39.7 7.4 2.48, 0.013§
Succeeded 36, 65.2, 67.0 33.0–83.5 10.3 32, 70.0, 70.5 37.1–90.3 10.3 –3.56, 0.0001§
Retreatment indicators
Cured 35, 47.1, 48.0 11.1–71.3 16.2 29, 48.5, 52.0 2.9–72.4 17.3 –1.22, 0.221
Completed 35, 14.1, 12.7 0.0–46.6 8.7 29, 13.4, 9.8 0.5–40.8 10.0 1.49, 0.135
Died 35, 7.9, 7.7 0.0–22.7 4.1 29, 10.4, 10.1 1.6–21.4 4.5 –2.27, 0.023§
Failed 35, 3.6, 2.8 0.2–14.6 2.8 29, 3.2, 3.0 –8.9 2.2 0.18, 0.861
Defaulted 35, 14.6, 12.8 4.6–29.3 6.9 29, 11.9, 10.9 2.7–26.7 6.2 1.49, 0.135
Succeeded 35, 61.1, 62.6 30.3–81.3 13.1 29, 61.9, 64.6 23.1–81.8 14.2 0.18, 0.861
Year 2005 only variables
Prevalence/100,000 38, 497, 513 55–936 178
TB mortality rate/100,000/ y 39, 79, 73 2–304 48
HIV/TB co-infection, % 39, 26.8, 19.0 0.5–75.0 20.5
Male/female ratio: case notifications
36, 1.5, 1.5 0.7–2.6 0.4
Health expenditures (US $ per capita)
39, 107, 51 15–689 131
*MDR, multidrug resistance; TB, tuberculosis; ss+, sputum sample positive. †Based on presurvey minus postsurvey values. A negative Z-score is indicative of an increase over time. ‡Marginally statistically significant trend (p<0.10). §Statistically significant trend (p<0.05).
Figure. Prevalence of multidrug resistance (MDR) in Africa among combined tuberculosis cases. A) Data collected from the Third Global
Report on Anti-tuberculosis Drug Resistance in the World of the World Health Organization (WHO) published in 2004 (40). B) Data from
various recent WHO publications, peer-reviewed journal articles, and WHO’s Fourth Global Report (1). C) Formulaic estimates of Zignol
et al. (11). AFRO, WHO Regional Offi ce for Africa.
Emerg Infect Dis 2008; 14: 1345-1352
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Diagnosis and treatment of MDR TB in the
world
WHO Global TB report, 2014
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What we need to do to eliminate tuberculosis
• Invest in public health
• Invest in research
• Embrace new ideas and new technology
• Take MDR-TB seriously
• Stop doing stupid stuff
• Speak with a louder voice
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What we need to do to eliminate tuberculosis
• Invest in public health
• Invest in research
• Embrace new ideas and new technology
• Take MDR-TB seriously
• Stop doing stupid stuff
• Speak with a louder voice
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First performance 1853 First performance 1896
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