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The prevalence of blinding trachoma in northern states of Sudan.

Hassan A, Ngondi JM, King JD, Elshafie BE, Al Ginaid G, Elsanousi M, Abdalla Z, Aziz N, Sankara D, Simms V, Cromwell EA, Emerson PM, Binnawi KH - PLoS Negl Trop Dis (2011)

Bottom Line: TF prevalence was above 10% in three districts and between 5% and 9% in 11 districts.TT prevalence among adults was above 1% in 20 districts (which included the three districts with TF prevalence >10%).The overall number of people with TT in the population was estimated to be 31,072 (lower and upper bounds = 26,125-36,955).

View Article: PubMed Central - PubMed

Affiliation: Federal Ministry of Health, Khartoum, Sudan.

ABSTRACT

Background: Despite historical evidence of blinding trachoma, there have been no widespread contemporary surveys of trachoma prevalence in the northern states of Sudan. We aimed to conduct district-level surveys in this vast region in order to map the extent of the problem and estimate the need for trachoma control interventions to eliminate blinding trachoma.

Methods and findings: Separate, population based cross-sectional surveys were conducted in 88 localities (districts) in 12 northern states of Sudan between 2006 and 2010. Two-stage cluster random sampling with probability proportional to size was used to select the sample. Trachoma grading was done using the WHO simplified grading system. Key prevalence indicators were trachomatous inflammation-follicular (TF) in children aged 1-9 years and trachomatous trichiasis (TT) in adults aged 15 years and above. The sample comprised 1,260 clusters from which 25,624 households were surveyed. A total of 106,697 participants (81.6% response rate) were examined for trachoma signs. TF prevalence was above 10% in three districts and between 5% and 9% in 11 districts. TT prevalence among adults was above 1% in 20 districts (which included the three districts with TF prevalence >10%). The overall number of people with TT in the population was estimated to be 31,072 (lower and upper bounds = 26,125-36,955).

Conclusion: Trachoma mapping is complete in the northern states of Sudan except for the Darfur States. The survey findings will facilitate programme planning and inform deployment of resources for elimination of trachoma from the northern states of Sudan by 2015, in accordance with the Sudan Federal Ministry of Health (FMOH) objectives.

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Related in: MedlinePlus

Map of Sudan showing the prevalence of inflammation-follicular (TF) in children aged 1–9 years.
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Related In: Results  -  Collection


getmorefigures.php?uid=PMC3104955&req=5

pntd-0001027-g001: Map of Sudan showing the prevalence of inflammation-follicular (TF) in children aged 1–9 years.

Mentions: Sudan is the largest country in Africa covering an area of 2.5 million square kilometres. The survey was undertaken in 88 localities (districts) from 2006 to 2010, which together compose 12 out of 15 northern states of Sudan (Figure 1, Map). It was not possible to conduct population-based probability sampling in the three states in the Darfur region (34 districts total) due to internal migration and security concerns.


The prevalence of blinding trachoma in northern states of Sudan.

Hassan A, Ngondi JM, King JD, Elshafie BE, Al Ginaid G, Elsanousi M, Abdalla Z, Aziz N, Sankara D, Simms V, Cromwell EA, Emerson PM, Binnawi KH - PLoS Negl Trop Dis (2011)

Map of Sudan showing the prevalence of inflammation-follicular (TF) in children aged 1–9 years.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3104955&req=5

pntd-0001027-g001: Map of Sudan showing the prevalence of inflammation-follicular (TF) in children aged 1–9 years.
Mentions: Sudan is the largest country in Africa covering an area of 2.5 million square kilometres. The survey was undertaken in 88 localities (districts) from 2006 to 2010, which together compose 12 out of 15 northern states of Sudan (Figure 1, Map). It was not possible to conduct population-based probability sampling in the three states in the Darfur region (34 districts total) due to internal migration and security concerns.

Bottom Line: TF prevalence was above 10% in three districts and between 5% and 9% in 11 districts.TT prevalence among adults was above 1% in 20 districts (which included the three districts with TF prevalence >10%).The overall number of people with TT in the population was estimated to be 31,072 (lower and upper bounds = 26,125-36,955).

View Article: PubMed Central - PubMed

Affiliation: Federal Ministry of Health, Khartoum, Sudan.

ABSTRACT

Background: Despite historical evidence of blinding trachoma, there have been no widespread contemporary surveys of trachoma prevalence in the northern states of Sudan. We aimed to conduct district-level surveys in this vast region in order to map the extent of the problem and estimate the need for trachoma control interventions to eliminate blinding trachoma.

Methods and findings: Separate, population based cross-sectional surveys were conducted in 88 localities (districts) in 12 northern states of Sudan between 2006 and 2010. Two-stage cluster random sampling with probability proportional to size was used to select the sample. Trachoma grading was done using the WHO simplified grading system. Key prevalence indicators were trachomatous inflammation-follicular (TF) in children aged 1-9 years and trachomatous trichiasis (TT) in adults aged 15 years and above. The sample comprised 1,260 clusters from which 25,624 households were surveyed. A total of 106,697 participants (81.6% response rate) were examined for trachoma signs. TF prevalence was above 10% in three districts and between 5% and 9% in 11 districts. TT prevalence among adults was above 1% in 20 districts (which included the three districts with TF prevalence >10%). The overall number of people with TT in the population was estimated to be 31,072 (lower and upper bounds = 26,125-36,955).

Conclusion: Trachoma mapping is complete in the northern states of Sudan except for the Darfur States. The survey findings will facilitate programme planning and inform deployment of resources for elimination of trachoma from the northern states of Sudan by 2015, in accordance with the Sudan Federal Ministry of Health (FMOH) objectives.

Show MeSH
Related in: MedlinePlus