infectious diseases
Types of Viral Disorders
Nonspecific febrile illness
Some viruses cause nonspecific symptoms, including fever, malaise, headaches, and myalgia. Transmission is usually by an arthropod vector. (See also .) Rift Valley fever is usually transmitted through contact with blood, body fluids, or tissues of infected animals, mainly livestock such as cattle, sheep, goats, buffalo, and camels. Transmission can also be through bites from infected mosquitos (see Centers for Disease Control and Prevention:Rift Valley Fever Transmission). Rift Valley fever rarely progresses to ocular disorders, meningoencephalitis, or a hemorrhagic form (which has a 50% mortality rate). 