Viral hemorrhagic fevers are caused by multiple viruses, including which of the following?

Viral hemorrhagic fevers are caused by multiple viruses, including which of the following?

• A. Ebola, Rift Valley fever, Yellow fever
• B. Smallpox, Anthrax, Tularemia
• C. Rabies, Hantavirus, Dengue
• D. Polio, Measles, Rubella

Answer: (A)

Viral hemorrhagic fevers come from a diverse group of viruses, all capable of causing fever with bleeding problems and organ involvement. Ebola, Rift Valley fever, and Yellow fever are classic examples of this group. Ebola is a filovirus that leads to severe systemic illness with bleeding and high mortality, spread mainly through contact with infected body fluids. Rift Valley fever virus, a bunyavirus, can cause hemorrhagic fever in humans and animals and is transmitted through mosquitoes or contact with infected fluids. Yellow fever virus, a flavivirus, is spread by Aedes mosquitoes and can progress to a hemorrhagic form with jaundice and bleeding in severe cases. The other sets mix pathogens that are not all viral hemorrhagic fevers or are primarily not associated with this syndrome, such as bacterial diseases. This is why they don’t fit the pattern as well as the trio that clearly represents viral hemorrhagic fevers.

Viral hemorrhagic fevers come from a diverse group of viruses, all capable of causing fever with bleeding problems and organ involvement. Ebola, Rift Valley fever, and Yellow fever are classic examples of this group. Ebola is a filovirus that leads to severe systemic illness with bleeding and high mortality, spread mainly through contact with infected body fluids. Rift Valley fever virus, a bunyavirus, can cause hemorrhagic fever in humans and animals and is transmitted through mosquitoes or contact with infected fluids. Yellow fever virus, a flavivirus, is spread by Aedes mosquitoes and can progress to a hemorrhagic form with jaundice and bleeding in severe cases.

The other sets mix pathogens that are not all viral hemorrhagic fevers or are primarily not associated with this syndrome, such as bacterial diseases. This is why they don’t fit the pattern as well as the trio that clearly represents viral hemorrhagic fevers.