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Monday October 24, 2011 Sharon Perry, PhD
Center for Global Health Tropical Medicine
Global Health Policy TB
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Outline
►Natural history ►Global Trends ► Policy & Governance
►Millennial Challenges
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Leading causes of death All ages
0% 2% 4% 6% 8% 10% 12% 14%
Traffic AccidentsDiabetes Mellitus
Respiratory CancersTuberculosis
HIV/AIDSDiarrheal Diseases
COPDLower Resp Infections
Stroke, CVDIschemic heart disease
Percent
World Bank, “Investing in Health”, 1993
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TB Facts
►9.4 million new cases/year 44% AFB smear+ 7.7% HIV+ ~500,000 multi-drug resistant (5.4%)
►14.4 million prevalent cases 1million children <14 (7%)
►1.6 million deaths (1 every 16 sec) 22% w/ HIV
►1/3 world’s population infected 10% lifetime risk of TB
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Natural History
70% 30%
90% 10%
50% may survive w/out Rx
Risk factors for progression •Malnutrition •HIV (21-33X risk) •Diabetes (3x risk) •Renal failure, smoking, anti-TNF, gastric bypass, silicosis
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50,000 years of co-evolution
R. Herschberg et al, PLOS Biology, 2008
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Blower & Hopewell, Nature, 1995
Dynamics of TB Epidemics
Reactivation epidemics Primary/progressive
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Why must we all die?
…As a nation, we owe it to ourselves… Humanity demands it, treaty obligations require it, and self-interest ought to prompt it.
Gov. Lyman Knapp, Alaskan Territory, 1892
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10,00012,00014,00016,00018,00020,00022,00024,00026,00028,000
1982 1985 1988 1991 1994 1997 2000 2003 2006 2009
Reported TB Cases* United States, 1982–2009
Year
No.
of
Case
s
*Updated as of July 1, 2010.
52.6/100k in 1953
3.8/100k
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Trends in TB Cases in Foreign-born Persons, United States, 1989–2009*
No. of Cases Percentage
*Updated as of July 1, 2010.
0
10
20
30
40
50
60
70
0
2,000
4,000
6,000
8,000
10,000
1989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009
No. of Cases Percentage of Total Cases
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Modern TB epidemics
AIDS
Drug Resistance
Diabetes
80% cases in 22 high burden countries
Poverty/Immunology Control/Adherence Political Instability
Diabetes
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TB control (US and developing world)
Program US Developing world
BCG vaccination No ~80%
Contact tracing Yes Ad hoc
LTBI Mass Screening Targeted No
Prophylaxis Yes No
Diagnostics AFB Smear CXR Culture DST
Yes Yes
Routine Routine
Yes
When available Seldom Seldom
Treatment Modality Funding
Individualized Ambulatory
Public-private mix
Standardized Residential/Amb.
Public
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Clinical & Programmatic Guidelines Monitoring & Evaluation Multi-lateral financing Drug & Diagnostic Procurement Research & Development
Policy & Governance
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Directly observed therapy –short course (DOTS)
$30-$50/ 1st line course 55 million TB patients since 1995 84% success rate
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How is TB control financed?
Global TB Control Report, 2011
$4 billion/year 85% Domestic 10% Stop TB programs 5% Foundations/NGO
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Key 2015 Targets (vs. 1990)
Global Plan to STOP TB 2006-2015
Negative Incidence trend
Halve prevalence Halve mortality
<1/1M by 2050
HIV
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Millennial Challenges
Laboratory Infrastructure HIV MDR Health System Restructuring Prevention/Prophylaxis Research/Development
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I. Laboratory Infrastructure Needs
Coverage Quality Assurance
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New Diagnostics
80/60 50/90
90/99
Chest Xray Sputum Smear Microscopy
Culture/DST
Hains Genotype MTB-DR Plus Cepheid Gene Xpert
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II. MDR/XDR TB
►~450,000 cases ►Rx 2000-3,000/course ► 3% new/20%
previous ►<1% tested (7%
previously treated) ► 16% tested on Rx ►By 2015 Rx 270,000 Dx 100% previously
treated
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III. HIV/TB
34% tested 46% on ART
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IV. Health Care Restructuring
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V. Contact tracing & Prophylaxis
Borgdorff et al, Bull WHO, 2002
US
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VI. Research & Development
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Funding needs
►Components DOTS (48%) DOTS-plus (15%) TB/HIV (6%) Lab Strengthening
(8%) Research/Dev’t (21%)
►New Diagnostics ►New Vaccines ►New Drugs
2006 -2015
Stop TB Plan 2006-2015; new projections account for 9B shortfall 2006-2010
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Recap ►Healthy human beings are substantially
equipped to control TB infection ►Control requires stable primary health care
systems ►Key Challenges Diagnostics MDR and HIV Health system structuring Political Commitment
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Useful Web sites ►WHO/TB & Stop TB Partnership
http://www.who.int/tb/en/ ►IUATLD http://www.theunion.org/ ►CDC/TB Elimination http://www.cdc.gov/tb/ ►Global Fund
http://www.theglobalfund.org/en/ ►Global Laboratory Initiative
http://www.stoptb.org/wg/gli/ ►Organization for Economic Development
http://www.oecd.org/
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Professional Organizations