Rift Valley fever mainly affects farm animals.

裂谷热主要影响农田动物。

These were the first reported cases of Rift Valley fever outside of Africa.

这是非洲以外报道的首批裂谷热病例。

It was, at the time, the biggest recorded outbreak of Rift Valley fever in east Africa.

那时，它是东非有记录的最大的裂谷热暴发。

Many different species of mosquitoes are vectors for the Rift Valley Fever (RVF) virus.

许多不同种类的蚊子是裂谷热病毒的媒介。

More than 25 human samples have proved positive for Rift Valley fever by PCR or ELISA testing.

通过聚合链反应或ELISA酶标法测试，共有超过25例人类样本被证实为裂谷热阳性。