Cet article fait partie d’une série d’explications à propos de la mise au point et de la distribution des vaccins.
Trachoma, caused by particular serovars of Chlamydia trachomatis, is the leading
infectious cause of blindness. Infection is transmitted within ocular and nasal secretions that are passed from person to person on fingers, fomites (such as clothing) and eye-seeking flies (particularly Musca sorbens)....
Ophthalmic infection is associated with an inflammatory conjunctivitis known as “active trachoma”. Repeated episodes of active trachoma can scar the eyelids. In some individuals this leads to trachomatous trichiasis (TT), in which one or more eyelashes on the upper
eyelid touch the eye. TT is extremely painful. It can be corrected surgically, but, if left untreated, may lead to corneal opacification, resulting in vision impairment and blindness.
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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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This position paper on polio vaccines replaces the 2016 WHO position paper, and summarizes recent developments in the field.
Cadre pour la planification, l'ebaoration et la mise en oeuvre de solutions avec et pour les jeunes e
orientations provisoires, première publication: 10 février 2021, mise à jour : 21 avril 2021, dernière mise à jour : 30 juillet 2021
In addition to the ongoing humanitarian emergencies in the country, the COVID-19 pandemic poses a potential monumental social and economic threat to Nigeria, with a devastating knock on effect for the most vulnerable population in the BAY states who have endured a decade of conflict. The UN system i...n Nigeria launched a One UN Response Plan to COVID-19 to support the rapid implementation of the Government’s National COVID-19 Multi-Sectoral Pandemic Response Plan and will continue to support strong coordination and coherence with all stakeholders responding to the pandemic.
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Weekly epidemiological record/ Relevé épidémiologique hebdomadaire 4 AUGUST 2017, 92th YEAR / 4 AOÛT 2017, 417-436
Élargir l’accès aux soins pour
lutter contre les troubles mentaux,
neurologiques et liés à l’utilisation
de substances psychoactives
Un supplément du curriculum de counseling sur la fi
stule obstétricale