West Nile Virus Knowledge Assessment

The video provides an overview of West Nile Virus, a relatively new disease first discovered in Uganda in 1937. It explains the virus's spread to North America in 1999, its classification as an arbovirus, and its surprising transmission across the Atlantic. The structure and replication process of flaviviruses are detailed, along with the symptoms and impact on humans. The video concludes with methods for diagnosing and preventing the virus, highlighting the lack of a human vaccine and the importance of vector control.

Where was West Nile Virus first discovered?

• New York, USA

• Tel Aviv, Israel

• Bucharest, Romania

• West Nile District, Uganda

Which family does West Nile Virus belong to?

• Flaviviridae

• Orthomyxoviridae

• Bunyaviridae

• Togaviridae

What is the natural reservoir for West Nile Virus?

• Humans

• Mosquitoes

• Birds

• Horses

How does West Nile Virus primarily spread?

• Direct human contact

• Contaminated water

• Mosquito-bird-mosquito cycle

• Airborne transmission

What type of genome do flaviviruses have?

• Single-stranded DNA

• Double-stranded RNA

• Single-stranded RNA

• Double-stranded DNA

What is a significant effect of West Nile Virus on the human body?

• Decreased heart rate

• Enhanced immune response

• Increased blood pressure

• Increased blood-brain barrier permeability

What percentage of West Nile Virus infections are asymptomatic?

• 50%

• 60%

• 70%

• 80%

Which group is at higher risk for encephalitis from West Nile Virus?

• Pregnant women

• Teenagers

• Elderly and organ transplant recipients

• Children

Why are humans considered 'dead-end hosts' for West Nile Virus?

• They do not maintain a persistent viremia

• They can transmit the virus to other humans

• They cannot be bitten by mosquitoes

• They are immune to the virus

What is the current best defense against arboviruses like West Nile Virus?

• Eliminating vectors and breeding grounds

• Antiviral medication

• Quarantine measures

• Vaccination