tb epidemiology in south africa · robert koch (1843-1910) r. koch was born in klausthal, germany...
TRANSCRIPT
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TB EPIDEMIOLOGY IN SOUTH
AFRICA
Dr. Norbert Ndjeka MD, DHSM (Wits), MMed(Fam Med) (MED), Dip HIV Man (SA)
Director Drug-Resistant TB, TB and HIV
National Department of Health
1 Dr Norbert Ndjeka
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Content of the presentation
Background: definitions, risk factors and history of TB
The Global situation The African and SADC situation
South African status
Conclusion
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BACKGROUND
DEFINITIONS
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What is tuberculosis?
Tuberculosis is an infection caused by Mycobacterium Tuberculosis
It is commonly known as TB
7000 BC TB was found in pre-historian human remains in the Eastern Mediterranean
3000 – 4000 BC TB found in spines of mummies
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Other names for TB through the
times
Consumption was another name for Tuberculosis(consuming people from the inside)
White plague (palor in people)
Wasting disease
Koch’s disease
1839 term Tuberculosis was introduced by J. L. Schoenlein
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Types of TB
Drug-susceptible TB, commonly called TB
Drug-Resistant TB (DR-TB) which is disease caused by Mycobacterium Tuberculosis strains resistant
to one or more anti - TB drugs.
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Types of DR-TB
Mono-resistance
• TB strains that are resistant to at least one anti-TB first-line drug (R or H or Z or E)
Poly-resistance
• TB strains that are resistant to at least one anti-TB first-line drug (R or H or Z or E)
MDR-TB
• TB strains resistant to rifampicin and isoniazid with or without resistance to other first-line TB drugs
XDR-TB
• TB strains resistant to rifampicin, isoniazid, any second line injectables (Am, Km or Cm) and to any fluoroquinolone
7/19/2012 Dr. Norbert Ndjeka 7
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BACKGROUND
RISK FACTORS
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Risk Factors enhancing TB
infection
Medical history: diabetes, HIV, vitamin D deficiency, any
medical or genetic factor that decreases immunity temporarily or permanently
Prolonged steroid therapy, cancer chemotherapy Social habit: smoking, alcoholism, drug addiction Socio-economic factors: overcrowded housing, poverty Environmental factors: exposure to asbestos, silica or solid
fuel
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BACKGROUND
HISTORICAL
BACKGROUND
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Milestones in TB History
Hermann Brehmer (1826 -1889)– born in Kurztsch in Silesia, Prussia. He suffered from TB as a botany student and was sent to the Himalayas by his father, also a physician. On his return he started studying medicines and presented his thesis in 1854 on the subject : “TB is a curable disease.”
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Hermann
Brehmer -
In 1854 he built the first sanatorium for patients afflicted by pulmonary tuberculosis in Goerbersdorf,Germany (now Sokolowsko, Poland) and is referred to as the founder of the sanatoria.
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Jean-Antoine villemin (1827-1892)
Born in Prey, Vosges. He studied medicines at the Military Medical school in Strasbourg and graduated in 1853 as an army doctor. Villemin proved that TB is an infectious disease by inoculating lab rabbits with material from infected humans and cattle. He published his results in the treatise “Etudes sur la Tuberculosis”. He found that some bacteria could attack other bacteria and created the term “antibiotic”.
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Dr Edward trudeau (1848 – 1915)
Dr Trudeau was born in New York and completed his medical training in 1871 at Columbia College.
He was diagnosed with tuberculosis in 1873 and cured in 1876 after a stay in the Adirondack Mountains.
In 1882 he read about H. Brehmer and founded the Adirondack Cottage Sanatorium. He founded the first laboratory, Saranac Laboratory for the Study of Tuberculosis in the US renamed “TheTrudeau Institute” (ref. Wikipedia Encyclopedia)
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Discovering the tubercle bacillus
24th
of March 1882 by Robert koch
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Robert koch (1843-1910)
R. Koch was born in Klausthal, Germany and qualified as a physician in 1866 at the University of Gottingen.
Robert Koch announced his discovery of the tubercle bacillus on 24.03.1882. He was named the founder of the medical bacteriology and also made the first photomicrographs of bacteria.
He discovered the phenomenon of “tuberculin
sensitivity”, foundation of cellular immunology. (ref. R.Koch – A life in Medicine and Bacteriology – Thomas D. Brock)
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Carlo Forlanini (1847-1918)
Born in Milan, Italy. Forlanini received his medical degree from the University of Pavia, in 1870.
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Forlanini developed the
pneumothorax in 1882
Carlo Forlanini developed the artificial pneumothorax in 1882 and induced the first artificial pneumothorax procedure in 1888. He reported the first results of the method six years later at the 11th Medical Congress in Rome.
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1900: The
sanatorium
movement begins:
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Support systems for patients were
developed
Spinal brace on a patient with spinal TB so that disabling deformities
of the spine might not occur (Valley Echo, June 1939)
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BCG was established in 1920
Bacillus Calmette-Guerin strain (BCG) was established
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TB drugs become available
on the market
1944: streptomycin was discovered for the use of TB treatment 1952: Isionazid theurapeutic efficacy confirmed/Pyrazinamide made available 1956: Madras experiment (outpatient chemotherapy) 1962: Clinical use of Ethambutol in US 1967: Clinical use of Rifampicin in US
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TB EPIDEMIOLOGY
GLOBAL SITUATION
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TB Epidemiology
Estimated TB incidence in 2009
World Africa South Africa
9.4 million Accounts for 1/3rd 3rd highest in numbers 2nd highest in incidence rate
Estimated proportion of HIV positives in incident TB cases in 2009
World Africa South Africa
1.1 million (12%) Accounts for 80% co-infected cases
Accounts for 31%, 60% TB patients are HIV pos
Estimated MDR-TB incidence
World Africa South Africa
650,000 5th highest in the world (13000); 2nd highest in
reported cases in the world Dr. Norbert Ndjeka 7/19/2012 24
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Ref: Multidrug and extensively drug-resistant TB
(M/XDR-TB): 2010 global report on surveillance and
response. WHO/HTM/TB/2010.3
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Ref: Multidrug and extensively drug-resistant TB
(M/XDR-TB): 2010 global report on surveillance and
response. WHO/HTM/TB/2010.3
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Current View Notified MDR-TB (absolute) - 2010
The boundaries and names shown and the designations used on this map 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.
Copyright - WHO 2011. All rights reserved.
Indicators of diagnosis, notification and treatment of multidrug-resistant TB, by country
Generated Source: www.who.int/tb/data 13-Jun-2012 10:21
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Current View Notified MDR-TB (population rate per 100,000) - 2010
The boundaries and names shown and the designations used on this map 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.
Copyright - WHO 2011. All rights reserved.
Indicators of diagnosis, notification and treatment of multidrug-resistant TB, by country
Generated Source: www.who.int/tb/data 13-Jun-2012 10:24
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Global situation
Globally, every year, an estimated 650,000 MDR-TB patients are diagnosed
Only 46,000 (7%) globally are initiated on treatment • WHO Report 2011, Global TB Control WHO/htm/tb/2011.16
7/19/2012 29 Dr. Norbert Ndjeka
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TB EPIDEMIOLOGY
AFRICAN & SADC
SITUATION
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Epidemiology of TB in Africa
Africa has 11 % of the world population with 1/3rd of notified TB cases
SADC Region in Africa has 25 % of the African population but 50 % of all notified TB cases
Mortality rate of TB is 2 to 3 times higher in the SADC region then in the rest of the African continent.
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Ref: Multidrug and extensively drug-resistant TB (M/XDR-TB): 2010 global report on surveillance and response.
WHO/HTM/TB/2010.3
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TB EPIDEMIOLOGY
SOUTH AFRICAN STATUS
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Current View
* % TB cases with 1st line DST exceeding 100% shown as 100%; this may happen if TB notification is incomplete especially in systems where
reporting of TB and DST are not linked.
* Outcomes for MDR-TB reported two years after the end of the year of enrolment. Patients may not be necessarily have been treated using
internationally-recommended regimens or norms
Time trend, cases Treatment outcomes of MDR-TB cases,
2005 2006 2007 2008 2009 2010
Notified TB 302,467 341,165 353,619 388,882 405,982 396,554
Notified MDR-TB (absolute) 2000 6716 7350 8026 9070 7386
Notified MDR-TB (population rate per 100,000) 4 14 15 16 18 15
% new TB cases with DST
% retreated TB cases with DST
MDR-TB cases with outcomes 0 0 3815 4383
MDR-TB cases enrolled 4143 5402
Estimated number of MDR-TB cases among notified new pulmonary TB cases 5,100
Estimated number of MDR-TB cases among notified new pulmonary TB cases, low bound 4,000
Estimated number of MDR-TB cases among notified new pulmonary TB cases, high bound 6,500
Estimated number of MDR-TB cases among notified retreated pulmonary TB cases 4,100
Estimated number of MDR-TB cases among notified retreated pulmonary TB cases, low bound 3,300
Estimated number of MDR-TB cases among notified retreated pulmonary TB cases, high bound 5,000
Indicators of diagnosis, notification and treatment of multidrug-resistant TB, by region or country
Generated Source: www.who.int/tb/data 12-Jun-2012 03:25
The indicators on this page are intended to monitor the progress of countries to key drug-resistance targets in the Global Plan to Stop TB 2011-2015 (p
Indicators Target for 2015
% of new bacteriologically positive TB cases reported with drug-susceptibility testing ( ≥20%
% of previously treated TB cases reported with drug-susceptibility testing (DST) result 100%
% of patients with confirmed MDR-TB completing treatment successfully ≥75%
% of confirmed MDR-TB cases for whom outcomes are reported 100%
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7/19/2012 Dr. Norbert Ndjeka 35
South Africa has the 3rd highest incidence of TB cases in the world (WHO, 2011)
5th highest number of drug-resistant TB cases in the world (WHO, 2011)
TB leading cause of mortality in South Africa (Statistics South Africa, 2011)
60% – 80% of all TB cases co-infected with HIV. (WHO, 2009; Gandhi et al., 2006)
TB in South Africa
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South Africa
South Africa is among the high burden TB and MDR-TB countries worldwide
In 2010 we diagnosed: 7 386 MDR-TB patients (5313 started on treatment) and 741 XDR-TB diagnosed with 615 started on treatment
Success rate of MDR-TB is low 42% (2007 cohort), 48 % (2008 cohort)
Success rate Drug-susceptible TB is 78 % (2010) with a cure rate of 73 %
7/19/2012 36 Dr. Norbert Ndjeka
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Laboratory diagnosed MDR-TB
7/19/2012 37 Dr. Norbert Ndjeka
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Laboratory diagnosed XDR-TB
7/19/2012 38 Dr. Norbert Ndjeka
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MDR-TB and XDR-TB initiated
on treatment
7/19/2012 39 Dr. Norbert Ndjeka
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7/19/2012 Dr. Norbert Ndjeka 40
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TB IN SOUTH AFRICA
AVAILABLE DR-TB
SERVICES
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42
Limpopo
North West Gauteng Mpumalanga
KZN Free State
Northern Cape
Western Cape
Eastern Cape
South Africa: 24 M(X)DR Units
= ~2,500 Beds
EXISTING MDR-TB units
MDR-TB Units before 2009
Decentralized MDR-TB Units after 2009
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Patient Load and Bed Availability
(as of April 2011)
7/19/2012 43 Dr. Norbert Ndjeka
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Management of DR-TB
7/19/2012 44 Dr. Norbert Ndjeka
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7/19/2012 Dr. Norbert Ndjeka 45
Flow
of D
R-T
B P
atie
nts
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BREWELSKLOOF
HOSPITAL
Worcester
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Harry Comay TB Hospital
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Newly renovated ward
llllllllllllllll
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DR-TB PATIENTS’ DINNING HALL
Changed outlook of patients’ dining hall to emulate hotel-like services
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DR-TB PATIENTS’
ENTERTAINMEMNT
Procured recreation equipment for patients
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28 October 2009 51
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28 October 2009 52
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TB IN SOUTH AFRICA
CONCLUSION
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In conclusion…
South Africa is a high-burden TB and DR-TB country
One percent (1 %) of the South African population gets TB annually
Isoniazid preventive therapy, Intensified Case finding and Infection Control (“triple Is”) are critical in preventing TB
Building of health care facilities needs to consider the TB epidemiology by producing designs that decrease TB transmission
54 Dr Norbert Ndjeka
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THANK YOU!
55 Dr Norbert Ndjeka