Chikungunya

Chikungunya

Q. 1 Chikungunya virus belongs to which family:

 A Enterovirus

 B

Herpes virus

 C

Toga virus

 D

None of the above

Q. 1

Chikungunya virus belongs to which family:

 A

Enterovirus

 B

Herpes virus

 C

Toga virus

 D

None of the above

Ans. C

Explanation:

Chikungunya is caused by the chikungunya virus, which is classified in the family Togaviridae, genus Alphavirus. 
 

Q. 2

Chikungunya is caused by ?

 A

Mosquito-borne Alphavirus

 B

Mosquito-borne Beta virus

 C

Mosquito-borne Gamma virus

 D

Mosquito-borne Deltavirus

Ans. A

Explanation:

Chikungunya caused by a mosquito-borne alphavirus.Previous outbreaks had been confined to the tropics, and some have attributed this expansion to global warming. 

 
Ref: Harrison’s Principles of Internal Medicine, 18e, Chapter 119.Introduction to Infectious Diseases.

 


Q. 3

Abroviral infection(s) include –

 A

Chikungunya fever 

 B

West nile fever

 C

JE

 D

a and b

Ans. D

Explanation:

Ans. is `a’ i.e., Chikungunya fever, ‘b’ i.e., West nile fever


Q. 4

Which of the following is NOT transmitted by Aedesaegypti –

 A

Filariasis

 B

Yellow fever

 C

Dengue fever

 D

Chikungunya Hemorrhagic fever

Ans. A

Explanation:

Ans. is ‘a’ i.e., Filariasis

Filariasis is rarely transmitted by Aedes Aegypti mosquito. It is usually transmited by culex mosquito.


Q. 5

Natural reservoir of Chikungunya virus in India is:

March 2007

 A

Monkey

 B

Guinea pig

 C

Aedes

 D

Dog

Ans. A

Explanation:

Ans. A: Monkey

 

The main virus reservoirs are monkeys, but other species can also be affected, including humans.


Q. 6  Animal shown in image is Reservoir host of 

 A

Rabies 

 B

Japanese encephalitis

 C

 Yellow fever

 D

 Chikungunya fever

Ans. B

Explanation:

Japanese encephalitis (Animals shown: Pig)

In Japanese encephalitis, pigs are the amplifier host (they themselves didn’t manifest overt symptoms but circulate the virus)

Japanese encephalitis/ Japanese B encephalitis

  • The Japanese encephalitis virus is a virus from the family Flaviviridae.
  • Domestic pigs and wild birds (herons) are reservoirs of the virus; transmission to humans may cause severe symptoms.
  • One of the most important vectors of this disease is the mosquito Culex tritaeniorhynchus.
  • This disease is most prevalent in Southeast Asia and the Far East.
  • Japanese encephalitis has an incubation period of 5 to 15 days and the vast majority of infections are asymptomatic Only 1 in 250 infections develop into encephalitis.

Q. 7 Emerging infection in India is ‑

 A Chikungunya

 B

Hanta virus

 C

Ebola viurs

 D

None

Ans. A

Explanation:

Ans. is ‘a’ i.e., Chikungunya

  • Emerging viral infections in India : (i) Nipha virus, (ii) Chandipura virus, (iii) Chikungunya virus, (iv) Avion influenza A (H5N, ) virus, and (v) Pandemic H IN, influenza virus.


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