Influenza

Question 1

three types of infuenza

Answer 1

A, B , C

Question 2

influenza

Answer 2

RNA enveloped
Orthomyxovirdae

Question 3

Surface antigens

Answer 3

H- hemagglutnin
N- neuraminidase

Question 4

how many strains are covered in the yearly influenza vaccine?

Answer 4

4 strains

Question 5

how many clades/Types of influenza are there

Answer 5

3 clades

Question 6

Influenza A

Answer 6

ability to create pandemics.
undergoes antigenic shift and antigenic drift.

Question 7

Influenza B

Answer 7

only in humans,
undergoes antigenic. drift

Question 8

influenza C

Answer 8

causes common cold

Question 9

What does the annual influenza vaccine contain

Answer 9

3 does of Type A and 1 does of type B

Question 10

Hemagglutinin

Answer 10

causes red blood cells to clump together

Question 11

neurominidase

Answer 11

enzyme that helps with transmission ( entry/exit)

Question 12

antigenic shift

Answer 12

switching/swapping of strains of nucleotides

Question 13

antigenic drift

Answer 13

point mutation; change in binding of virius

Question 14

what is antigenic shift most common in?

Answer 14

swine (pig) and avian ( bird)

Question 15

what are the different types of influenza

Answer 15

human, avian, and swine

Question 16

How does swine flu develop

Answer 16

from pig being infected with avian and human flu

Question 17

Incubation for influenza

Answer 17

typical is 2 days
-range 1-4 days

Question 18

communicable

Answer 18

1-4 days before the onset of symptoms and about 5 days after the first symptoms

Question 19

peak shedding for flu

Answer 19

first 3 days

Question 20

when does the flu subsides

Answer 20

usually 5-7th days in adults- can be ten or more days in childern
-about 50% of infected people do not have symptoms but are still contagious

Question 21

Spread of influenza

Answer 21

by virus-laden respiratory droplets that are expelled during coughing and sneezing
-range in size from 0.08 to 0.12up

Question 22

what are the modes of transmission for influenza

Answer 22

droplets, airborne, contact, indirect

Question 23

where do particles of influenza last longer

Answer 23

moist and warm environments
humidity 35%-40%
temp 28C (82F)

Question 24

how long are particles recoverable on hard, non-porous surfaces

Answer 24

more than 24 hours

Question 25

how long are particles transferable to hands on hard, non porous surfaces

Answer 25

up to 24 hours

Question 26

how long are particles recoverable on cloth, paper, and tissue

Answer 26

8-12 hours

Question 27

how long are particles transferable to hands on clothes , paper, and tissue

Answer 27

15 minutes

Question 28

the smaller the particle

Answer 28

the more sick one will get

Question 29

where does the particle go if it is small

Answer 29

lower respiratory tract

Question 30

where does the particle go if it is medium large

Answer 30

upper respiratory tract

Question 31

How many hemgglutnin strains are there?

Answer 31

13 types

Question 32

how many neuraminidase strains are there

Answer 32

9 types

Question 33

1918

Answer 33

spanish flu H1N1

Question 34

1957-58

Answer 34

asain flu H2N2

Question 35

1968

Answer 35

hong kong flu H3N2

Question 36

what helps detemine how viable the particle will be on surfaces

Answer 36

size

Question 37

how many people dies in 1918 from influenza worldwide

Answer 37

20-40 million

Question 38

how many people died in 19189 from the influenza in the US

Answer 38

500,000

Question 39

how many people died from asain flu worldwide

Answer 39

over a million

Question 40

how many people died from Asian flu in US

Answer 40

about 70,000

Question 41

what did most people do to get rid of the virus

Answer 41

gargled salt water

Question 42

what factors need to be considered

Answer 42

-age -carear -SES -

Question 43

the mortality rate of the spanish flu epidemic

Answer 43

2.5%