West Nile Virus (Genus Flavivirus)

The video discusses West Nile Virus (WNV), a relatively new disease first discovered in Uganda in 1937. It explains the virus's spread to North America in 1999 and its classification as an arbovirus within the Flaviviridae family. The video covers the virus's biology, including its RNA genome and replication process, and details its transmission cycle involving mosquitoes and birds. It highlights the symptoms of WNV, noting that most infections are asymptomatic, but some can lead to severe neurological diseases. The video concludes with prevention strategies, emphasizing vector control and the lack of a human vaccine.

Where was West Nile Virus first discovered?

• Romania

• Israel

• North America

• Uganda

Which family does West Nile Virus belong to?

• Rhabdoviridae

• Flaviviridae

• Bunyaviridae

• Togaviridae

What is the primary transmission cycle of West Nile Virus?

• Bird-mosquito-bird

• Human-bird-human

• Mosquito-human-mosquito

• Tick-human-tick

How do flaviviruses like West Nile Virus enter host cells?

• Endocytosis

• Budding at the cell surface

• Exocytosis

• Direct fusion with the cell membrane

What percentage of West Nile Virus infections are asymptomatic?

• 80%

• 70%

• 60%

• 50%

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

• Young adults

• Older adults

• Children

• Athletes

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

• Antiviral medication

• Quarantine measures

• Vaccination

• Eliminating vectors and breeding grounds