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TRANSCRIPT
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Blindness in Sudan: a predicament in a turbulent sea of darkness
Mr Ismail JaliliFRCS, DO, FRCOphth
Consultant Ophthalmologist
BAFOSS London International Conference on the Establishment of Better Health Services in Southern Sudan, The Imperial College, London, 14-15 July 2005
As presented on 15 July 2005 at the Imperial College, London
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Blindness in Sudan
• Global Perspective• Sub-Saharan Africa• The Sudan• Southern Sudan• Prevention and VISION 2020• What is needed
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Blindness in Sudan
• Global Perspective• Sub-Saharan Africa• The Sudan• Southern Sudan• Vision 2020• What is needed
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Factors Influencing Blindness• Socio-economic• Geographical and• Political
FACTORS
- size of the problem- patterns variations
contribute
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World Bank Categories of Countries
• EME: Established Market Economies• PSE: Previous Socialist Economies• LAC: Latin American Economies• MEC: Middle East Crescent• CHINA: China• INDIA: India• OAI: Other Asian Islands• SSA: Sub Saharan Africa
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World Blindness
• EME: Age related• Developing Countries: Acquired
a major problem in many developing countries
10X the rate in the developed countries,
over 80% of cases, are either preventable or curable
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Prevalence of Blindness
Economy/Status of Health Care % Blind Blind/Million
Good (EME) 0.25 2500Fair (Latin America) 0.50 5000Poor (Asia) 0.75 7500Very Poor (SSA) 1.00+ 10,000+
Courtesy of Foster A, Global Blindness
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Blindness: Associated Factors
• old age (majority >70)(increase in population size & age)
• being female• socio-demographic and socioeconomic status
(educational attainment, occupation):-– exposure to specific risk factors– utilization of services (preventive,
curative)
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Number of Blind Worldwide
1975 1980 1984 1990 1995 200005
101520253035404550
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Blind Changing PatternsThe pattern of blindness is a dynamic equation (Intervention/ improvement of facilities, socio-economic conditions)
• Disappeared: small pox
• Newly appearing: AIDS and injuries
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Global TrendsCause % Trend
• Cataract 50 }• Refractive Errors 10 } • Glaucoma 10 } increasing• Diabetic retinopathy 5 } • ARMD/Others 10 } • Trachoma/ Infections 12 }• Onchocerciasis 2 } decreasing• Vitamin A Deficiency 1 }
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Onchocerciasis1%
Others38%
Trachoma13%
Cataract45%Childhood
Blindness3%
Blindness Worldwide: Causes
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Blindness in Sudan (2-SSA)
• Global Perspective• Sub-Saharan Africa• The Sudan• Southern Sudan• Vision 2020• What is needed
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Prevalence of Blindness in SSH
• Wide inter-regional variations
• 1% of Africans are blind
Gurage zone in central Ethiopia (1.5-7.9%), Zambia (3.6%), Liberia (3.24%), Niger 2.6%, Central African Republic (2.2%), Mali, Central Ghana (1.7%), Sierra Leon (1.3%), Kwazulu (1%), Togo (0.82%), Kenya (0.7%), Benin (0.6%), Northern Transvaal (0.57%), Congo (0.3%), Oyo state, Nigeria (0.15%).
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Causations of Blindness in SSA
• Cataract, Trachoma, Glaucoma(17 million blind from cataract in the world, 2-3 millions live in Africa).
• Onchocerciasis - Sudan-savannah- Rain forest
• Xerophthalmia• Others: uveitis , macular degeneration, trauma
phthisis bulbi, cortical and the visual pathways causes.
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Poor uptake of eye services in SSA
Financial constraints from indirect costs: travel, accommodation, etc.
Obstacles in SSA
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Blindness in Sudan (3)
• Global Perspective• Sub-Saharan Africa• The Sudan• Southern Sudan• Vision 2020• What is needed
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The Sudan
• a large country• population of 37m
(year 2000) • many climate zones:
– arid northern half– mountains with fertile
climates in south– fresh and wild nature in
the very south
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Blindness in Sudan
No population based surveys
• estimated prevalence of 1.5%• cataract backlog (around 300,000). • endemic trachoma• onchocerciasis pockets remains in
some parts of the country.
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Under 5 Mortality Rate
0 20 40 60 80 100 120 140 160
Bahrain
Qatar
Libya
OPT
Tunisia
Saudi Arabia
Syrian Arab Republic
Lebanon
Jordan
Egypt
Iran
Morocco
Algeria
Kyrgyzstan
Uzbekistan
Tajikistan
Sudan
Yemen
Pakistan
Djibouti
Sudan: 93 to 105/1000, SS 250/1000
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U5M Rate > 200/1000 LB• Sierra Leone 303• Angola 247• Niger 256• S. Sudan 250• Liberia 242• Mali 233• Burkina Faso 232• Congo 221• Guinea-Bissau 215• Mozambique 212• Chad 202
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Blindness in Sudan (4)
• Global Perspective • Sub-Saharan Africa• The Sudan• Southern Sudan ?• Vision 2020• What is needed
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Higher visual morbidity:• low socio-economic development. • slow growth• traditional methods of farming, fishing,
and pastoralism.• large-scale presence of black fly.• conflict.
Southern Sudan
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Causes of Blindness in SS700 Sudanese refugees in
18 of Adjumani refugee settlement camps in Uganda
• cataract (42%)• xerophthalmia (28%)• trachoma (21%)• glaucoma/others (9%)• refractive errors • wars, injuries.
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Prevalence of Blindness in S. SudanKawuma et al 2000
• bilateral blindness in 21% of the people• 11% are unilaterally blind. • this is an extremely high prevalence, nearly 10X
higher than for Ugandans living in Uganda.• mainly due to the high prevalence of
onchocerciasis and trachoma.
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The Size of the ProblemBlindness in SS is increasing day by day:
• mainly because of the cataract backlog, and it will double within the next twenty years if no action is taken.
• Sudan is also one of the countries with relatively few ophthalmologists.
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Blindness in Sudan
Trachoma
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Global Distribution of Trachoma and ITI Supported Country Programme
- International Trachoma Initiative
.
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Trachoma Epidemiology
• morbidity rate of 83.2/1000 in the Northern Province.
• Diminishing south-wards until it reached 0.94/1000 in the extreme southern region (Equatorial Province).
Salim and Sheikh (1975)
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Trachoma in Sudan
Characteristics in endemic areas in Sudan
• a relationship exists between the rainfall, the relative humidity, and the incidence of trachoma that was thought to be peculiar to Sudan.
• infection starts very early in the 1st year of life. • a marked difference between the prevalence in
towns and villages with:-– 71.3% in villages– 56.7% in the towns.
(in the age group 1-4) years
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31Trachoma and Water Supplies
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Sudan: Factors in Trachoma Transmission
multi-factorial• mechanical trauma caused by frequent
sandstorms • irritation of the eyes by dust particles
excessive watering and discharge rubbing with the fingers
• the custom of frequent hand-shaking • poor personal hygiene in pre-school-children• associated bacterial conjunctivitis• eye-seeking flies.
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Trachoma in Sudan: Current Situation
Mahmoud et al 1994
trachoma was still prevalent in the country among persons of
low socio-economic status
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VAD in Eastern Mediterranean
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Risk Factors of Xerophthalmia
• living in remote and arid regions• male gender• age• poverty of the household• prevalence of diarrhoea• less xerophthalmia was observed among
children who during the 24 hours preceding the survey had consumed dairy products or non-leafy vegetables containing vitamin A.
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Xerophthalmia – Dry Eye
• conjunctiva
• cornea
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Sudan: Prevalence of VAD
29,615 childrenbetween 6 and 72 months of age, in five rural areas of Khartoum and Gezira provinces:-
2.9%
Much higher figures in malnourished children aged 4-60 months at 29% (n=213).
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Onchocerciasis Blindness
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Onchocerciasis
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Onchocerciasis in Sudan
• Reported in Sudan since 1908 • Prevails in 3 endemic regions known as:
– the southern focus(south-west)– Northern focus– Eastern focus (near the Ethiopian borders)
fast flowing water suitable for S. damnosum S.L:the only fly in which the Onchocerca volvulus has been
found to breed in Sudan.
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The South-Western Focus
• the largest focus.(the huge area between Bahr El-Arabeand the White Nile).
• the most serious focus with blindness rates equal to, or in excess of, those in the worst affected foci elsewhere in Africa.
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• These are often small villages localized along the rivers flowing north and east from the borders with the Central African Republic and Zaire.
• In the blinding foci, ocular OC is as severe as that found in any other African foci.
Onchocerciasis in Southern Sudan
SudanSouthernWesternFocus
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The South-western Focus
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Diabetic Retinopathy
• it is highly possible that DR is an important cause of visual morbidity in Sudan considering that diabetes is a growing health problem with major health impact according to the WHO.
• estimated prevalence is 3.5%
(almost all diabetic patients receive minimal diabetes care).
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Poor Diabetic Control
The poor control is attributed to:
• poor drug compliance • diet• insulin availability • absence of diabetic education • absence of screening programmes
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Blindness in Sudan (5)
• Global Perspective• Sub-Saharan Africa• The Sudan• Southern Sudan• The way forward ….
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Prevention of Blindness
• International initiatives: • The Carter Centre• ITI• Albasar Foundation• VISION 2020• Others
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VISION 2020
3 Components
• Disease control.• Infrastructure development• Human resource development.
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VISION 2020
3 Tiers are involved
• Advocacy through through WHO/IAPB• Planning by national PBL programmes• Implementation through Vision 2020
centers and community eye care.
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Combating Programmes
The Carter Centre Initiative
Trachoma - North
Oncho. - South
Cataract Initiatives
Albaser
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58Childhood Blindness
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Childhood Blindness
• SSA:– Corneal scarring (VAD, measles, infections)
• MEC:– Hereditary conditions (Congenital cataract,
congenital glaucoma, retinal dystrophies)
Changing pattern of childhood blindness
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Childhood blindness in Sudan
• Only 2 blind schools• Both in Northern Sudan• South ??
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Childhood Blindness:Disease Control
Targets• reduction of the global prevalence of childhood blindness
from 0.75/1000 children to 0.4/1000 children.• eradication of corneal scarring from VAD, measles, or
ophthalmia neonatorum.• elimination of new cases of CRS.• surgical management of paediatric cataract in
specialized centres together with immediate and effective optical correction.
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Targets for disease control (2)
• Screening all babies• Vision screening as part of school
health programmes• Provision of glasses for refractive errors
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What is Needed is….
• Epidemiological studies• Childhood blindness assessment
Lack of any data on the size of problem of Childhood Blindness!
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Recommendations
Conducting epidemiological surveys on the causes and prevalence of blindness in particular in children and setting up strategies to combat blindness in this population.Ismail Jalili
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And above all ……….
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Thank you
Shukran
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Contact Details
Website: www.jalili.co.uk
Email: [email protected]
Other related websites: www.arabmedical.org.uk
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