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Rift Valley fever action framework












Mariner, J.C., Raizman, E., Pittiglio, C., Bebay, C., Kivaria, F., Lubroth, J., Makonnen, Y.. 2022. Rift Valley fever action framework. FAO Animal Production and Health Guidelines, No. 29. Rome. 




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    Book (series)
    Rift Valley fever surveillance
    FAO Animal Production and Health Manual No. 21.
    2018
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    Rift Valley fever (RVF) virus, a mosquito-borne zoonotic agent, causes haemorrhagic fever in humans, and abortion and neonatal death in livestock. Outbreaks have caused national meat markets to collapse and have in the past caused regional trade embargoes. The geography of infection and clinical disease is expanding. Climate change is expected to accelerate this spread. The known geographic range of the virus is already larger than the areas where clinical disease has been observed. Effective surveillance is essential to mitigate the impact of RVF on lives, livelihoods and national economies. The RVF Surveillance Manual provides risk-based guidance for designing, planning and implementing effective participatory and syndromic surveillance. It builds on approaches outlined in the OIE Guide to Terrestrial Animal Health Surveillance and the RVF Decision Support Framework. It shows you how to tailor this guidance to the epidemiological needs of individual countries, starting with setting appropriate objectives. RVF surveillance objectives need to be in line with the country’s risk category and economic goals. Selecting the most appropriate indicators and methods for the situation follows easily from these goals and objectives. The manual is not prescriptive. Instead, it suggests questions to help you build a timely and sensitive surveillance system suited to national objectives and resources
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    Rift Valley fever outbreaks in Madagascar and potential risks to neighbouring countries 2008
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    Rift Valley fever (RVF) is an arthropod-borne viral disease of ruminants, camels and humans. It is a significant zoonosis which may present itself from an uncomplicated influenza-like illness to a haemorrhagic disease with severe liver involvement and ocular or neurological lesions. In animals, RVF may be unapparent in non-pregnant adults, but outbreaks are characterised by the onset of a large number of abortions and high neonatal mortality. The virus (Phlebovirus) is usually transmitted by var ious arthropods. Human infections have also resulted from the bites of infected mosquitoes, most commonly the Aedes mosquito. Mosquitoes from six genera (Aedes, Culex, Mansonia, Anopheles, Coquillettidia and Eretmapodites), including more than 30 species, have been recorded as infected, and some of them are proven to have a role as vectors. Most of these species acquire the infection by biting infected vertebrate animals, but some (specifically Aedes spp.) pass the virus transovarially (vertical transmission). These infected pools of eggs can survive through desiccation for months or years and restart transmission after flooding; then other species (Culex spp.) may be involved as secondary vectors. Vertical transmission (from an infected female mosquito to eggs) explains how the virus can persist for many years or decades between outbreaks.
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    Book (series)
    Rift Valley Fever in Niger: Rapid Risk Assessment Report 2017
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    Since early August 2016, several human cases of Rift Valley fever (RVF), including some deaths, have been notified in Niger. According to the field investigations an increased mortality and abortions in small ruminants, cattle and camels have been observed. The impact of this outbreak on public health and animal husbandry of the affected area is considered serious. In addition, the risk of transboundary spread is arising a great concern in international organizations. Given the severe epidemiolo gical situation in Niger, the Food and Agriculture Organization of the United Nations (FAO), in consultation with international external experts, prepared a rapid qualitative risk assessment in order to evaluate the impact of this RVF outbreak in Niger in animal production and human health and to estimate the risks of short and medium term spread of the infection to the neighbouring countries. The developed rapid risk assessment is based on the information available until the 14th of October 20 16.

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