Orthomyxovirus/Influenza

Question 1

Influenzaviruses have segmented genome

Answer 1

T

Question 2

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

Answer 2

T

Question 3

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

Answer 3

T

Question 4

The M2 protein of influenza viruses serves as an ion channel important in the decapsidation

Answer 4

T

Question 5

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

Answer 5

T

Question 6

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

Answer 6

T

Question 7

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

Answer 7

T

Question 8

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

Answer 8

T

Question 9

Bats have an important role in the epidemiology of influenza

Answer 9

F

Question 10

Antigenic shift is behind the influenza pandemics

Answer 10

T

Question 11

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

Answer 11

F

Question 12

Influenza causes persistent infection in donkey

Answer 12

F

Question 13

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

Answer 13

T

Question 14

The influenza viruses cause respiratory signs in sea mammals

Answer 14

T

Question 15

The host range of influenza virus is determined by the NA protein

Answer 15

F?

Question 16

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

Answer 16

T

Question 17

The main host of influenza is the swine

Answer 17

F

Question 18

In humans inactivated vaccines are used for the immunisation against influenza

Answer 18

T

Question 19

Antigenic drift is behind the seasonal influenza epidemics

Answer 19

T

Question 20

Antigenic shift means the reassortment of the influenzavirus genome segments

Answer 20

T

Question 21

Influenzaviruses are sensitive to drying out

Answer 21

T

Question 22

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

Answer 22

T

Question 23

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

Answer 23

T

Question 24

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

Answer 24

F

Question 25

Dogs are susceptible to horse origin influenza strains

Answer 25

T

Question 26

The HPAI strains can cause CNS signs

Answer 26

T

Question 27

HPAI causes blood vessel damages and generalised infections

Answer 27

T

Question 28

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

Answer 28

T

Question 29

The LPAI causes immunosuppression

Answer 29

T

Question 30

Cat is susceptible to human seasonal influenza

Answer 30

F

Question 31

HPAI strains are mutations of LPAI strains

Answer 31

T

Question 32

HPAI strains belong into a certain haemagglutinin types

Answer 32

F

Question 33

Influenzas Causes enteric symptoms in human.

Answer 33

T

Question 34

Anti-neuraminidase drugs inhibit the decapsidation of influenza viruses

Answer 34

F

Question 35

Swine recovered from influenza should not be kept for breeding

Answer 35

T

Question 36

Influenza causes high morbidity but low mortality in swine

Answer 36

T

Question 37

The HPAI causes skin haemorrhages in swine

Answer 37

F

Question 38

Swine influenza outbreaks occur usually during summer

Answer 38

F

Question 39

The mortality of swine influenza is high

Answer 39

F

Question 40

Swine influenza causes high morbidity rate

Answer 40

T

Question 41

To prevent complications of swine influenza penicillin injections are given to sick pigs

Answer 41

T

Question 42

Swine influenza is easily transmitted to people

Answer 42

F?

Question 43

To prevent complications of swine influenza, antibiotics used

Answer 43

T

Question 44

In swine all influenza variants can be detected

Answer 44

F

Question 45

In a horse influenza outbreak all infected horses must be killed

Answer 45

F

Question 46

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

Answer 46

T

Question 47

Racehorses should be vaccinated before the influenza season

Answer 47

F

Question 48

Breeding mares should be vaccinated before the influenza season

Answer 48

F

Question 49

Influenza causes persistent infection in horses

Answer 49

F

Question 50

The eggs produced in LPAI infected flock can be hatched

Answer 50

T

Question 51

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

Answer 51

F

Question 52

The HPAI strains can cause clinical signs in waterfowl

Answer 52

T

Question 53

In poultry farms LPAI may be endemic without clinical signs

Answer 53

T

Question 54

Waterfowl can carry the influenza viruses for long time

Answer 54

T

Question 55

Influenza viruses are shed by birds exclusively in the nasal discharge

Answer 55

F

Question 56

Avian influenza is zoonotic

Answer 56

T

Question 57

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

Answer 57

T

Question 58

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

Answer 58

F

Question 59

In birds all influenza variants can be detected

Answer 59

T

Question 60

Avian influenza of high economic impact is caused by HPAI strains

Answer 60

T

Question 61

Avian influenza virus is primarily spread through bronchial discharge and aerogenic route

Answer 61

F

Question 62

Avian influenza spread by bronchial discharge

Answer 62

T??