حمى الوادي المتصدع "Rift Valley Fever" كيف ينتشر الفيروس وكيف تتم الوقاية؟

Quote: Patients with RVF usually have initial signs and symptoms of influenza-like illness; less than 8% of patients subsequently have severe disease, including generalized hemorrhagic syndrome, encephalitis, or retinitis (2). The overall human mortality rate from RVF has been estimated at 0.5%--1.0% of those infected , but the rate is much higher among those with severe disease. The largest reported human outbreak occurred in Kenya during 1997--1998, in which an estimated 89,000 persons (based on a systematic serosurvey) were infected and 478 died; this outbreak also was centered in NEP (3--5). Previous RVF outbreaks among humans were not reported outside sub-Saharan Africa until 1977--1978, when approximately 18,000 persons became ill with RVF in Egypt, and in 2000, when approximately 800 persons in Saudi Arabia and 1,000 in Yemen had severe illness (6--8).