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The World Health Organization (WHO) endorses the use of population-based prevalence surveys for estimating the prevalence of trachoma. In general, the prevalence of TF in children aged 1–9 years and the prevalence of TT in adults aged ≥ 15 years are measured at the same time in any district bein...g surveyed. This was the approach of the Global Trachoma Mapping Project, which undertook baseline surveys in > 1500 districts worldwide in order to provide the data required to start interventions where needed.
The survey design recommended by WHO is a two-stage cluster random sample survey, which uses probability proportional to size sampling to select 20–30 villages, and random, systematic or quasi-random sampling to select 25–30 households in each of those villages. In most surveys, everyone aged ≥ 1 year living in selected households is examined.
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BMC Family Practice201415:165, DOI: 10.1186/1471-2296-15-165
Open Access
Towards Universal Access to Prevention, Diagnosis and Treatment
The overall objective of this implementation plan is to define the strategy for implementation of the Xpert MTB/RIF test for rapid detection of TB and rifampicin (RIF) resistance in Tanzania, within the context of the National Tuberculosis and Leprosy Programme (NTLP) strategic plan and other nation...al health guidelines. It is intended to serve as the main guiding document for national, regional and local programme managers, clinicians, coordinators, laboratory staff and other health workers; national and regional reference laboratories; local and international implementing partners; and donors involved in TB control.
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Good practice guide
Supporting community action on HIV, health and rights to end AIDS
Advocacy, communication and social mobilization for TB control
Statistical Agency under the President of the Republic of Tajikistan Dushanbe, Republic of Tajikistan
Ministry of Health and Social Protection of Population of the Republic of Tajikistan
Dushanbe, Republic of Tajikistan
The DHS Program ICF
Rockville, Maryland, USA
PLOS Medicine | https://doi.org/10.1371/journal.pmed.1002514 March 1, 2018