Arboviruses

Question 0

Which is not a Bunyavirus?
A.Rift Valley fever
B.Crimean Congo hemorrhagic fever
C.Sandfly fever
D.Dengue hemorrhagic fever

Answer 0

D

Question 1

Humans may be \_\_ hosts of Arboviruses.
A.intermediate
B.definitive
C.accidental
D.A & B
E.B & C

Answer 1

E

Question 2

Which is not a member of Flaviviridae?
A.Japanese encephalitis 
B.Yellow fever
C.Chikungunya
D.Dengue hemorrhagic fever

Answer 2

C

Chikungunya is a member of Togaviridae

Question 3

Which is not common in our country?
A.Japanese encephalitis 
B.Yellow fever
C.Chikungunya
D.Dengue hemorrhagic fever

Answer 3

b

Question 4

A)Family Flaviviridae
B)Enveloped
C)(+)ssDNA virus
D)fifth genotype still under observation

False abt dengue virus

Answer 4

C

(+)ssRNA dapat

Question 5

False about Aedes mosquito
A)Infected male mosquito transmits dengue
B)Found in tropical and subtropical areas
C)Breed in clean, stagnant water
D)none of the 3

Answer 5

A

Female dapat

Question 6

False about Aeses
A.Primarily a nocturnal feeder
B.Live around human habitation, generally “indoor”
C.Lay eggs and produces larvae preferentially in artificial containers

Answer 6

A

Daytime dapat

Question 7

Aedes species that is Usually found outdoors (in stagnant waters collected on banana trees)

Answer 7

Aedes albopictus

Question 8

Which is false?
A)Attachment to specific receptors on many different cell types from many different species
B)When coated with antibodies, Ig can attach to Fc receptors on surface of macrophages and monocytes
C)Both are false
D)Both are true

Answer 8

B

Antigens, not antibodies

Question 9

\_\_ binds to the virus (second infection) and forms the “infectious complex” 
A. IgE
B. IgG
C. IgM
D. IgA

Answer 9

B

Question 10

“infectious complex” binds to \_\_receptor on surface of macrophages & monocytes
A)Fa
B)Fab
C)Fbc
D)Fc

Answer 10

D

Question 11

Virus is taken up by \_\_
A.exocytosis
B.pinocytosis
C.endocytosis
D.transcytosis

Answer 11

C

Question 12

Sequence

A)Recognition of viral antigens on the surface of infected
B)T-cell proliferation
C)Induction of memory T-cell
D)T-cell lyses the virus

Answer 12

C B A D

Question 13

Mesenchymal Cells →Plasma leakage→ SHOCK→ Hemostatic system→ Hemorrhage

What is wrong with the pathogenesis of dengue?

Answer 13

Endothelial, not mesenchymal

Question 14

Classical dengue vs dengue hemorrhagic fever: main difference

Answer 14

Classic dengue- severe myalgia

Dengue hemorrhagic fever- bleeding

Question 15

Hematemesis is \_\_
A.vomiting of blood
B.passage of black and tarry stools
C.passage of fresh blood through anus with or in stools
D.none of the above

Answer 15

A

Question 16

Melena is
A.vomiting of blood
B.passage of black and tarry stools
C.passage of fresh blood through anus with or in stools
D.none of the above

Answer 16

B

Question 17

Hematochezia is
A.vomiting of blood
B.passage of black and tarry stools
C.passage of fresh blood through anus with or in stools
D.none of the above

Answer 17

C

Question 18

All are definitive symptoms of DHF except
A.melena
B.hematemesis
C.hematochezia
D.myalgia

Answer 18

D

Question 19

Enumerate theories on DHF Pathogenesis

Answer 19

Antibody enhancement theory

Viral virulence theory

Question 20

Antibody enhancement theory is AKA __

Answer 20

Halstead’s Theory

Question 21

Viral virulence theory is AKA __

Answer 21

Rosen’s Theory

Question 22

False about Halstead’s Theoy

1. secondary dengue is not a risk factor
2. heterotypic antibodies from a previous infection promote increased viral replication within mononuclear leukocytes
3. immunologic processes occur
4. dengue virus-infected cells are eliminated

Answer 22

1

Question 23

Treatment for dengue

Answer 23

Fluid replacement

Question 24

Enumerate lab diagnostic methods for dengue

Answer 24

Identifcation via serotyping Isolation Serology

Question 25

Elimination of adult mosquitoes is always effective T or F?

Answer 25

F

Question 26

It is believed that Manila is the reason of the respreading of dengue in the Americas in 2002 through __

Answer 26

tires in ships

Question 27

family of Chikungunya

Answer 27

Togaviridae

Question 28

``` false about Chikungunya A. enveloped B. (-)ssRNA virus C. limited to Asia-Pacific region D. vaccine is not available ```

Answer 28

B (+) dapat

Question 29

enumerate vectors of Chikungunya

Answer 29

Aedes aegypti | Aedes albopictus

Question 30

main presentation of Chikungunya

Answer 30

joint pains

Question 31

family of Japanese Encephalitis

Answer 31

Flaviviridae

Question 32

``` false about Japanese Encephalitis A. naked B. (+)ssRNA virus C. mostly neurologic symptoms D. vaccine is available ```

Answer 32

A enveloped dapat

Question 33

vector of Japanese Encephalitis

Answer 33

Culex tritaeniorhyncus

Question 34

false about Culex tritaeniorhyncus A. breeds in rice fields B. infects in peridomestic areas C. humans are only natural host

Answer 34

C