DrVirgo
Forum Hero
Topics: 1096
Posts: 3,515
|
50. Periodic world-wide pandemics of respiratory infections occur because of shifts in the antigenic properties of which of the following viruses?
A) Coronavirus
B) Influenza A
C) Influenza B
D) Influenza C
E) Parainfluenza virus
F) Respiratory syncytial virus
G) Rhinovirus
___________________
Our greatest glory is not in never falling, but in rising every time we fall.
|
| yasmeen
Forum Guru
Topics: 70
Posts: 942
|
B
|
| DrVirgo
Forum Hero
Topics: 1096
Posts: 3,515
|
WHY? Can you explain?
___________________
Our greatest glory is not in never falling, but in rising every time we fall.
|
| yasmeen
Forum Guru
Topics: 70
Posts: 942
|
DUE TO ANTIGENIC SHIFTS AND DRIFTS ORGANISM CHANGES MORPHOLOGY THUS DIFFICULT TO MAKE VACCINE
|
| r_albayunen
Forum Senior
Topics: 0
Posts: 218
|
B
if this helps .. its a Orthomixovirus which is segmented 8 segments .. this peculiarity allows the virus to follow genetic reassortment and shifts between many strains leading to different types and causing world pandemics.
|
| robin082006
Forum Hero
Topics: 471
Posts: 5,123
|
Good explanation, thanks
You're very good at Micro, albayumen
___________________
The Key to Succeed is Patience.
|
| r_albayunen
Forum Senior
Topics: 0
Posts: 218
|
|
| DrVirgo
Forum Hero
Topics: 1096
Posts: 3,515
|
Yes, I agree. Good explanation.
What about Influenza B?
Which strains are in the Influenza vaccine?
___________________
Our greatest glory is not in never falling, but in rising every time we fall.
|
|
| |
| | | | | | | | |
