West Nile fever

Question 1

Migratory birds play a role in the transmission of West Nile virus

Answer 1

T

Question 2

Mammals are mostly accidental hosts of West Nile Fever virus

Answer 2

T

Question 3

West Nile Fever is a notifiable disease

Answer 3

T

Question 4

In West Nile epidemics wild bird mortality is usually observed before horse and human cases
can be detected

Answer 4

T

Question 5

To prevent West Nile Fever, vaccine is available for horses

Answer 5

T

Question 6

The West Nile Fever can be diagnosed unambiguously by the clinical signs

Answer 6

F

Question 7

The West Nile Fever virus infects mostly swine and cattle

Answer 7

F

Question 8

The West Nile virus may cause encephalitis in humans and in horses

Answer 8

T

Question 9

Horses and humans do not play a significant role in the transmission of West Nile virus

Answer 9

T

Question 10

The West Nile fever epidemics occur usually at the end of summer and during Autumn

Answer 10

T

Question 11

WNV typically causes reproductive problems in cattle

Answer 11

F

Question 12

West Nile fever can be unambiguously diagnosed on the basis of clinical signs

Answer 12

F

Question 13

Fomites play the most significant role in the transmission of WNV

Answer 13

F

Question 14

West Nile Virus is only present in Africa

Answer 14

F

Question 15

Wild birds are the natural hosts of West Nile virus

Answer 15

T

Question 16

WNV causes central nervous signs in 80-90% of the infections

Answer 16

F

Question 17

WNV outbreaks usually develop in the end of summer and in autumn

Answer 17

T

Question 18

WNV cannot be isolated in cell cultures

Answer 18

F

Question 19

Vaccines are available for the prevention of horses from WNV infections

Answer 19

T

Question 20

Horses are the reservoirs host of WNV

Answer 20

F

Question 21

Different genetic lineages of West Nile virus are circulating in Europe.

Answer 21

T

Question 22

Various strains of WNV, belonging to different genetic lineages are circulating in Europe

Answer 22

T

Question 23

There is no vaccine available for humans against WNV infection yet

Answer 23

T

Question 24

Mosquitoes are the principle vectors of the WNV

Answer 24

T

Question 25

The weather does not influence the occurrence of WNV outbreaks

Answer 25

F

Question 26

The sero-diagnostics of WNV is complicated by cross-reactions with related flaviviruses

Answer 26

T

Question 27

Certain predatory bird species are particularly sensitive to WNV infections

Answer 27

T

Question 28

The use of repellents may reduce the risk of infection with WNV

Answer 28

T

Question 29

The weather influences the emergence of West Nile Virus outbreaks, through its effect on mosquito propagation dynamics.

Answer 29

T

Question 30

Laboratory diagnosis should confirm the aetiology of West Nile encephalitis

Answer 30

T

Question 31

West-Nile fever practically is restricted to Africa.

Answer 31

F

Question 32

The most important maintaining hosts of West Nile fever virus are water birds.

Answer 32

T

Question 33

Clinical signs of West Nile fever are most frequently seen in birds, horses and humans

Answer 33

T

Question 34

Neurological signs develop only in a small percentage of the diseased animals. in WNF

Answer 34

T

Question 35

West Nile fever occurs worldwide.

Answer 35

F because not mention americas

Question 36

Vectors of West Nile fever virus are different mosquito species.

Answer 36

T

Question 37

The host range of West Nile virus is very wide.

Answer 37

T

Question 38

Humans are not susceptible to West Nile disease virus.

Answer 38

F

Question 39

The sero-diagnostics of West Nile virus is complicated by cross-reactions with related flaviviruses

Answer 39

T

Question 40

The West Nile Virus is genetically uniform, but at least 15 serotypes are known.

Answer 40

F

Question 41

Certain predatory bird species are particularly sensitive to West Nile virus infections

Answer 41

T

Question 42

The use of repellents may reduce the risk of infection with West Nile virus

Answer 42

T

Question 43

Fomites play the most significant role in the transmission of the West Nile Virus.

Answer 43

F

Question 44

West Nile Virus typically causes reproductive problems in cattle.

Answer 44

F

Question 45

There are no available vaccinations for humans against West Nile Virus yet.

Answer 45

T

Question 46

The principal vectors of the West Nile Virus are midges

Answer 46

F

Question 47

Different genetic lineages of West Nile Virus are circulating in Europe.

Answer 47

T

Question 48

West Nile Virus mainly causes diarrhoea in sheep.

Answer 48

F

Question 49

West Nile Virus causes central nervous signs in 80-90% of the infections

Answer 49

F

Question 50

West Nile Virus outbreaks usually develop in the end of summer and in autumn

Answer 50

T

Question 51

West Nile Virus cannot be isolated in cell cultures.

Answer 51

F

Question 52

West Nile Virus is the only known zoonotic flavivirus.

Answer 52

F