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Rift Valley fever

Vigilance needed in the coming months









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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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    Rift Valley Fever could spread with movement of animals from East Africa 2007
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    RVF is a per-acute or acute disease of domestic ruminants, caused by a mosquito-borne virus and characterised by hepatic necrosis and internal haemorrhages. The severity and degree of clinical signs may vary according to age or breeds of the animals affected, with infections usually unapparent or mild in adults but high mortality rates in new-born animals and abortions in pregnant animals . RVF is a zoonotic disease and humans become infected through contact with tissues of infected animals or m osquito bites. Infection in humans is usually associated with mild to moderately severe influenza-like illness, but severe complications such as retinal damage and blindness, encephalitis or haemorrhagic disease occur in about 1% of patients. The case fatality rate in humans can be considerable.
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