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Influenza Virus Characteristics

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Questions and Answers

What is the mode of transmission of the mumps virus?

Vector-borne transmission
Direct contact
Contaminated food and water
Respiratory droplets (correct)

What is the typical incubation period of mumps?

7-10 days
21-25 days
14-18 days (correct)
28-30 days

What is the diagnostic test of choice for mumps?

Viral Isolation
PCR of CSF (correct)
Ribonucleic protein helix
Immunofluorescence

Why has there been a resurgence of mumps?

Waning immunity to vaccine (B) Signup and view all the answers

What is the typical duration of communicability of mumps?

3 days before and 4 days after active infection (D) Signup and view all the answers

What is the name of the vaccine that protects against mumps?

MMR (A) Signup and view all the answers

What is the main reason for the annual flu vaccine?

Due to the segmented nature of the influenza virus genome, causing mutations and different strains (A) Signup and view all the answers

What is the function of Neuraminidase in the influenza virus?

To hydrolyze the mucus and destroy unoccupied hemagglutinin receptors (A) Signup and view all the answers

What is Antigenic Drift?

A minor mutation in the hemagglutinin antigen, making prior immunity less effective (C) Signup and view all the answers

What is the role of Hemagglutinin in the influenza virus?

To bind to host receptors and facilitate membrane fusion (B) Signup and view all the answers

What is the main reservoir of influenza viruses?

Birds, swine, horses, dogs, and cats (C) Signup and view all the answers

What is Antigenic Shift?

A major change in the surface antigens of the influenza virus (B) Signup and view all the answers

What is the primary factor that determines immunity to different strains of influenza?

Antibody against the H protein (A) Signup and view all the answers

What is the typical incubation period of influenza?

2-4 days (C) Signup and view all the answers

What is the primary mechanism by which influenza epidemics occur?

Antigenic shift (B) Signup and view all the answers

What is the primary benefit of early administration of Neuraminidase Inhibitors (NAIs) in influenza treatment?

Reduction of severity and duration (B) Signup and view all the answers

What is the primary purpose of flu vaccination in public health?

To prevent severe illness in high-risk individuals (B) Signup and view all the answers

What is the characteristic of the clinical presentation of influenza?

Abrupt acute onset of fever and body pain (A) Signup and view all the answers