Tuberculosis: The Big Picture And Challenge of Drug-resistance · Excess TB Morbidity, U.S....
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Tuberculosis: The Big Picture And Challenge of Drug-resistance
RADM Kenneth G. Castro, M.D.Assistant Surgeon General, USPHS
Director, Division of Tuberculosis EliminationNational Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention
Coordinating Center for Infectious DiseasesCenters for Disease Control and Prevention
5th APHL National Conference on Laboratory Aspects of Tuberculosis
August 11-13, 2008San Diego, California
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“Those who cannot remember the past are condemned to repeat it”
George Santayana, The Life of Reason, 1905
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Excess TB Morbidity, U.S. 1985-1992
Cantwell M, et al. JAMA 1994; 272:536
Conditions
• Deficient infrastructure
• HIV epidemic
• Immigration
• Institutional transmission
• MDR-TB
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HospitalTotal
Cases% HIV
Infected%
DeathsMedian WksDx
to DeathA 65 93 72 7B 51 100 89 16C 70 95 77 4D 29 91 83 4E 7 14 43 4F 16 82 82 4I 13 100 85 4J 28 96 93 4
Prison 42 98 79 4
Profile of Selected HIV-related MDR TBOutbreak Investigations in U.S., 1988–92
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Heatlthcare Worker Union and ACT-UP Demonstrations, 1991
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National Action Plan to CombatMultidrug-Resistant Tuberculosis
Recommendations and Reports
June 19, 1992 / 41(RR-11);1-48
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U.S. Response to TB ResurgenceNational MDR-TB Action Plan
& New ResourcesImproved Case
Identification & Training
Updated Diagnostic Labs, Real-time Drug Resistance,
& Strain Fingerprinting
Updated Infection Control& Rx Recommendations
DOT & ImprovedRx CompletionRebuilt Research
Capacity
2HRZEplus 4HR
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Effect of DOT on Drug Resistance & Relapse, Tarrant County, Texas*
Variable
(01/80-10/86)
(11/86-12/92)
value 10
Resistance
13.0
6.7
0.001
Acq. Resistance
14.0
2.1
<0.001Total Relapses
20.9
5.5
<0.001
During Rx
4.4
1.2
0.003MDR TB
6.1
0.9
<0.001
SAT
DOT
P
* Weis, et al. N Eng J Med 1994;330:1179-84
______Percent_______
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TB Laboratory StandardsLab Tools
Max TAT*
• AFB microscopy
≤ 24 hrs
• NAA
≤ 48 hrs
• Culture detection
≤ 14 days
• Culture identification
≤ 21 days
• 1st-line DST
≤
30 days• 2nd-line DST
≤
4 weeks
* Turn-around time (TAT) from specimen collection; for 2nd-line DST from date of request
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Reported TB Cases* United States, 1982–2007**
10,00012,00014,00016,00018,00020,00022,00024,00026,00028,000
1983 1986 1989 1992 1995 1998 2001 2004 2007
Year
No.
of C
ases
*Updated as of April 23, 2008** Unpublished provisional data, not for citation
13,299
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TB Case Rates,* United States, 2007**
<
3.5 (year 2000 target)3.6–4.4> 4.4 (national average)
D.C.
*Cases per 100,000.** Unpublished provisional data, not for citation
AL
HI
CA
AZ
TXLA
MS GA
FL
SC
NY
NJMD
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Reported TB Cases by Race/Ethnicity* United States, 2007**
Hispanic or Latino(29%) Black or
African American(26%)
Asian(26%)
White(17%)
American Indian orAlaska Native (1%)
Native Hawaiian orOther Pacific Islander
(<1%)
*All races are non-Hispanic. Persons reporting two or more races accounted for less than 1% of all cases.** Unpublished provisional data, not for citation
83% in racial/ethnic minorities
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Trends in TB Cases in Foreign-born Persons, United States, 1986–2007*
0
2,000
4,000
6,000
8,000
10,000
8687 89 91 93 95 97 99 01 03 05 07010203040506070
No. of Cases Percentage of Total Cases
No. of Cases Percentage
* Unpublished provisional data, not for citation
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Countries of Birth of Foreign-born Persons Reported with TB
United States, 2007*
Mexico(25%)
Philippines(11%)
Viet Nam(8%)India
(7%)China(5%)
Haiti(3%)
Guatemala(3%)
OtherCountries
(38%)
* Unpublished provisional data, not for citation
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80% of Global TB Cases in 22 Countries
No estimate0–999
10 000–99 999100 000–999 9991 000 000 or more
1000–9999
Estimated number of new TB cases (all forms)
Global 9.2 million new TB cases,1.7 million deaths in 2006
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Global New TB Cases/100,000 Population, 2006
No estimate
0-24
50-99
100-299
300 or more
25-49
Estimated new TB cases (all forms) per 100 000 population
Europe: case rates up by 40% during 1990s, now
falling slowly
Africa: case rates up by 200+% during 1990s, now
falling slowly
World: case rates rising during 1990s, now stable or
falling slowly
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Global Stop TB Strategy
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By 2005 sustain or exceed by 2015Detect 70% of new sputum smear (SS) + cases
2005 Global 60%Successfully treat 85% of these cases
2004 Global 84%By 2015Reduce TB prevalence and deaths by 50% (relative to 1990)
Reducing prevalence to ≤
155 per 100,0002005 Global 217/100,000
Reducing deaths to ≤
14 per
100,0002005 Global 24/100,000
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“…the issue now confronting the nation is whether we will allow another cycle of neglect to begin or, instead, whether we will take decisive action to eliminate tuberculosis.”
©2000 IOM
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IOM “Ending Neglect” Recommendations: Eliminate TB in U.S.
1.
Maintain control while adapting to declining incidence
2.
Speed decline through increased treatment of latent infection
3.
Develop new diagnostic, treatment, and vaccine tools
4.
Increase U.S. engagement in global efforts5.
Mobilize support for elimination and monitor progress
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Active TB Source Contact
Infection
Interrupting Chain of Transmission for Mycobacterium tuberculosis complex
Secondary TB Cases
TreatmentTB Disease
InfectionControl
TreatmentLTBI
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Prevalence of Tuberculosis Infection, U.S.
Poverty Index = Family income / poverty threshold adjusted by family size.(Poverty defined as poverty: income ratio < 1)
Bennet DE, et al. Am J Resp Crit Care Med 2008;177:348-55
Population% LTBI Prevalence
(95% CI)Estimated No. x Million (95% CI)
All 4.2 (3.3-5.2) 11.2 (8.9-14.0)
U.S.-born 1.8 (1.4-2.1) 4.1 (3.1-5.6)
Foreign-born 18.7 (13.5-25.2) 6.9 (5.0-9.3)
Poverty Index ≥ 1 3.3 (2.5-4.4) 6.5 (4.9-8.6)
Poverty Index < 1 6.1 (4.0-9.1) 2.8 (1.8-4.2)
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Pooled Sensitivity & Specificity of IGRAs and TSTTest Sensitivity (95% CI) Specificity (95% CI)
QuantiFERON- Gold
78 (72-80) 99 (98-100)‡*96 (94-98)‡**
QuantiFERON- Gold In-Tube
70 (63-78)
T-SPOT.TB 90 (86-93) 93 (86-100)
Tuberculin Skin Test
77 (71-82) 97 (95-99)*59 (46-73)**
‡
Pooled results for QFN-Gold and QFN-GIT* Non-BCG vaccinated, ** BCG vaccinated
Ann Intern Med 2008;149:1-8
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Multi- and Extensively-
Drug Resistant TB
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What is MDR and XDR TB?• MDR TB
strains are resistant to ≥
INH and RIF (most important 1st-line drugs)
• XDR TB = a subgroup of MDR strains with extensive additional resistance to– Any fluoroquinolones, and – One of the 2nd-line
injectable drugs (amikacin, kanamycin, capreomycin)
MDR TB
XDR TB
Culture confirmed TB cases with adequate
DST Results
Cases with any
drug resistance
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MDR, XDR TB: Why be Concerned?
• Treatment requires 18–24 mo (vs 6–8 mo)• Relapse rates ~30-40% (vs 2-3%)• Prolonged infectiousness• Adverse events common (fewer with FLDs)• Higher costs (> 100-fold increase)• High mortality
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Effect of Rifampin Duration and Drug
Resistance on Treatment Outcomes
Lew W, Pai M, Oxlade O, Martin D, Menzies D. Initial Drug resistance and tuberculosistreatment outomes: systematic review and meta-analysis. Ann Int Med 2008;149:123-134
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TB Treatment Outcomes, by Selected Drug Resistance Patterns, Latvia, 2000-2003*
0 10 20 30 40 50 60 70
All MDRTB
HR+FQ+INJ
Cure Completion Death Default Failed HIV+
* Leimane V, et al. First Global XDR TB Task Force Meeting. Oct 9, 2006(from N = 820 evaluated)
Percent
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Based on 138 settings surveyed in 116 countries between 1994-2007
490,000 (95% CI, 455,093–614,215) incident cases in 2006
4.8% (95% CI, 4.6%–6.0%)
of all TB cases notified in 2006
Global Estimate of MDR TB
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% MDR TB Among New and Previously Treated Patients, by Region
0
5
10
15
20
25
30
35
40G
loba
l
Afric
a
Amer
icas
East
ern
Med
iterran
ean
East
ern
Euro
pe
Cen
tral a
nd
Wes
tern
Eur
ope
Sout
h Ea
st A
sia
Wes
tern
Pac
ific
MDR %
MDR-TB among NewNew Patients
Retreatment Patients
Source: WHO Anti-Tuberculosis Drug Resistance in the World, 4th Global Report. WHO/HTM/TB/2008.394
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XDR TB in KZN: Patient Characteristics*Characteristics (53 XDR TB Pts.) No. (%)No prior TB treatment (n=47) 26 ( 55)Prior hospitalization [last 2 yrs] (n=42) 28 ( 67)Previous TB treatment (n=47)
Cured or completed 14 ( 30)Failure or default 7 ( 15)
HIV infection (n=44) 44 (100)Dead: includes 15 (34%) on ARVs 52 ( 98)Identical genotype (n=46) 39 ( 85)
* Gandhi NR, Moll A, Sturm AW, Pawinski R, Govender T, Lalloo U, Zeller K, Andrews J, Friedland G. Extensively drug-resistant tuberculosis as a cause of death in patients co-infected with tuberculosis and HIV in a rural area of South Africa. Lancet 2006;368:1575-1580
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Primary MDR TB United States, 1993–2007*
0100200300400500
93 94 95 96 97 98 99 00 01 02 03 04 05 06 07Year
0
1
2
3
No. of Cases Percentage* Provisional data, not for citationNote: Based on initial isolates from persons with no prior history of TB. MDR TB defined as resistance to at least isoniazid and rifampin.
No. Cases Percent
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Primary MDR TB in U.S.-born and Foreign-born Persons, U.S., 1993–2007*
0
1
2
3
1993 1995 1997 1999 2001 2003 2005 2007
U.S.-born Foreign-born
% R
esis
tant
* Provisional data, not for citationNote: Based on initial isolates from persons with no prior history of TB.MDR TB defined as resistance to at least isoniazid and rifampin.
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XDR TB Cases, United States, 1993-2007*
02468
10
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
Year
Tota
l XD
R T
B C
ases
*2007 Unpublished provisional data, not for citation
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XDR TB Cases by State of Residence, United States, 1993–2007*
* Based on Initial DST results; residence N/A for 2 cases
States (and City)
No. (%) Cases• New York City 16 ( 33)• California
11 ( 23)
• New York State
8 ( 17)• New Jersey
3 ( 6)
• NV, TX (2 each)
4 ( 8)
• Six other states (1 each) 6 ( 13)Total
48 (100)
79%
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Diagnosing MDR and XDR TB: Requires Heightened Index of Suspicion
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http://www.nationaltbcenter.edu/drtb/
Diagnostic Laboratory Needs
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Antimicrobial Agents Chemotherapy 2005;49:3192-7:
Journal Clinical Microbiology 2006;44:2378-81
Clinical Infectious Diseases 2007;44:418-23
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Examples of Rapid Drug Resistance Methods
Test GenoType®
MTBDR
INNO-LiPA Rif.TB
Company Hain Lifescience Innogenetics
M. tuberculosis detection Yes YesDetection RMP resistance Yes YesDetection INH resistance Yes NoStrip Assay Yes YesDNA basis: PCR Yes YesDirect assay No Yes (modified
version)
RMP resistance:rpoB gene Yes YesINH resistance:katG gene Yes No
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WHO Expert Panel on Line Probe assays. May 2008
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TB Clinical Development PipelineCompound Development Stage Sponsor / Coordinator
Gatifloxacin Phase IIIEC / OFLOTUB Consortium; IRD*; WHO TDRο; Lupin Ltd.
Moxifloxacin Phase II / III
Bayer; TB Alliance; CDC♦; University College of London; Johns Hopkins University
Early Bactericidal Activity Johnson & Johnson (Tibotec)Early Bactericidal Activity Otsuka Pharmaceutical Co., Ltd.Phase I TB AlliancePhase I Lupin Ltd.
*
Institut de Recherche pour le Developementο
World Health Organization, Tropical Disease Research♦
Centers for Disease Control and PreventionNovel compounds, highlighted in blue boxes, are active against MDR/XDR TB
Diarylquinoline TMC207
Nitroimidazo-oxazoleOPC-67683 Nitroimidazole PA-824
Pyrrole LL-3858
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Why Control TB and Drug Resistance?
• Reduce personal suffering and death
• Protect others ─ public health benefit
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Technical Tools for TB Control
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"Insanity is doing the same thing over and over again and expecting
different results."
- Albert Einstein
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Acknowledgements
• National TB Controllers Association
• State and Local Health- department TB Programs
and Laboratories• APHL• Federal TB Task Force• Global Stop TB
Partnership
• OGAC/PEPFAR• Treatment Action Group• USAID• WHO Stop TB Department• Global XDR TB Task
Force• FIND, Global Alliance• DTBE Staff (HQ, Field)
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Genotype and phenotype correlation in 250 clinical M. tuberculosis isolates from Hong Kong.