MT2 - Orthomyxo/influenza

Question 1

1) Influenzaviruses have segmented genome

Answer 1

T

Question 2

2) HPAI and LPAI strains differ in the number of basal amino acids in the HA protein

Answer 2

T

Question 3

3) HA protein of influenza viruses is responsible for the attachment to the cell

Answer 3

T

Question 4

4) Antigenic drift means serials of point mutations in the HA and NA genes

Answer 4

T

Question 5

5) The NA protein in the influenza virus is responsible for the release from the infected cells

Answer 5

T

Question 6

6) Enzymatic cleavage of the HA protein is needed for the influenza virus penetration into the cell T

Answer 6

T

Question 7

7) Genetic reassortment of human and animal influenza viruses result in the occurrence of new human influenza strains

Answer 7

T

Question 8

8) Bats have an important role in the epidemiology of influenza

Answer 8

F

Question 9

9) Antigenic shift is behind the influenza pandemics

Answer 9

T

Question 10

10) Influenza viruses are classified into genera by their HA and NA proteins

Answer 10

F

Question 11

11) Influenza causes persistent infection in donkey

Answer 11

F

Question 12

12) The serotype of influenza viruses is determined by their HA and NA proteins

Answer 12

T

Question 13

13) The influenza viruses cause respiratory signs in sea mammals

Answer 13

T

Question 14

15) The bird to human host switch of influenza virus is mediated by swine

Answer 14

T

Question 15

16) The main host of influenza is the swine

Answer 15

F

Question 16

17) In humans inactivated vaccines are used for the immunisation against influenza

Answer 16

T

Question 17

.

Answer 17

.

Question 18

20) Influenzaviruses are sensitive to drying out

Answer 18

T

Question 19

21) For the in vitro propagation of influenza viruses embryonated eggs is used

Answer 19

T

Question 20

22) The high virulence of some influenza A viruses is the result of mutations in the HA gene

Answer 20

T

Question 21

-

Answer 21

-

Question 22

24) Dogs are susceptible to horse origin influenza strains

Answer 22

T

Question 23

25) The HPAI strains can cause CNS Signs

Answer 23

T

Question 24

26) HPAI causes blood vessel damages and generalised infections

Answer 24

T

Question 25

27) The HPAI strains are usually developed from the H5 and H7 influenza viruses

Answer 25

T

Question 26

28) The LPAI causes immunosuppression

Answer 26

T

Question 27

29) Cat is susceptible to human seasonal influenza

Answer 27

F

Question 28

30) Swine recovered from influenza should not be kept for breeding

Answer 28

T

Question 29

31) Influenza causes high morbidity but low mortality in swine

Answer 29

T

Question 30

32) The HPAI causes skin haemorrhages in swine

Answer 30

F

Question 31

33) Swine influenza outbreaks occur usually during summer

Answer 31

F

Question 32

34) In a horse influenza outbreak all infected horses must be killed

Answer 32

F

Question 33

35) The generalized symptoms of horse influenza are result of the interferon response

Answer 33

T

Question 34

36) Racehorses should be vaccinated before the influenza season

Answer 34

F

Question 35

37) Breeding mares should be vaccinated before the influenza season

Answer 35

F

Question 36

38) The eggs produced in LPAI infected flock can be hatched

Answer 36

T

Question 37

39) The HPAI infection can be unambiguously differentiated from Newcastle disease by the clinical signs

Answer 37

F

Question 38

40) The HPAI strains can cause clinical signs in waterfowl

Answer 38

T

Question 39

41) In poultry farms LPAI may be endemic without clinical signs

Answer 39

T

Question 40

42) Waterfowl can carry the influenza viruses for long time

Answer 40

T

Question 41

Influenza viruses are shed by birds exclusively in the nasal discharge

Answer 41

F

Question 42

44) Avian influenza is zoonotic

Answer 42

T

Question 43

45) The virulence of avian influenza is determined by the i.v. pathogeny index and mortality

Answer 43

T

Question 44

46) Avian influenza can switch directly to human and cause epidemics with high case numbers as result of human to human transmission

Answer 44

F