Lesson 5 (Part 1) Flashcards
When can influenza affect you?
Anytime of the year
- most common in the fall/winter months
Why can influenza effect you anytime of the year?
Because someone could be travelling from a winter place to a summer place and spread it
What are the major types of flues? (3)
- Spanish flu
- Asian flu
- bird flu - Hong Kong flu
What type of strain is the Spanish flu?
H1N1
What is the strain for the Asian flu?
H2N2
What is the Asian flu?
Bird flu
- mutation in wild ducks
What strain is the HK flu?
H3N2
What was the HK flu caused by?
By the antigenic shift
- descended from H2N2
What are the 4 types on influenza?
- Influenza A
- Influenza B
- Influenza C
- Influenza D
What can Influenza A cause?
Seasonal epidemics and pandemics in humans
What are 2 subtypes of Influenza A?
- Hemagglutinin
- HA - Neuraminidase
- NA
How many strains does HA have?
18 subtypes
How many strains does NA have?
11 subtypes
What do the Influenza A strains cause?
Widespread of human disease over decades
- there are more to come
What are the 2 strains of Influenza A that are currently found in humans?
- H1N1
2. H3N2
What was the new hybrid Influenza A virus consist of in 2009? (3)
- Swine flu
- Avian flu
- Human strains
What did the hybrid Influenza A cause?
The first Influenza pandemic in over 40 years
What can Influenza B cause?
Seasonal epidemics in humans
How many distinct lineages or strains are there for Influenza B?
2
- both contribute variably each year to the worldwide flu illnesses
What is the order of the name of an Influenza virus? (5)
- Virus type
- Geographic location
- Strain number
- Year of isolation
- Virus subtype
Which Influenza is detected less frequently?
Influenza C
- dont know they are typically sick and as a result not much of the publics concern
What can Influenza C cause?
Mild infections
Where is Influenza D found?
Primarly in cattle
- not know to infect humans
