Guide pour l’élaboration de protocoles de recherche dans les pays à faibles revenus
Le présent document s’adresse essentiellement au personnel des programmes de surveillance du VIH dont la tâche est de surveiller l’évolution de l’épidémie de VIH. Il décrit la manière dont les données recueillies systématiquement dans le cadre des programmes de prévention de la trans...mission mère-enfant du VIH ( PTME) peuvent être utilisées aux fins de la surveillance du VIH chez les femmes enceintes en consultation prénatale.
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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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