MCQ on Vector Borne Viral diseases (Medical Microbiology)

Multiple Choice Question on Vector-Borne Viruses

1) Which of the following is not the mosquito-borne viral disease?
a) Dengue
b) Lassa fever
c) Yellow fever
d) Japanese B encephalitis

2) Name the vector via which encephalitis and yellow fever are transmitted to humans?
a) Ticks
b) Sandflies
c) Mosquitoes
d) Rodents

3) All of the following statements are true regarding Arboviruses, Except?
a) All viruses of the family have a single-stranded RNA genome
b) They cause arthropod-borne viral infections
c) Viruses only belong to the family Arenaviridae
d) They can infect humans, animals, and plants

4) Japanese encephalitis has been mainly found in Asia and can be transmitted through the bite of a mosquitoes. 

Which of the following is the primary reservoir of the virus?
a) Herons
b) Horses
c) Cows
d) Rabbits

5) Which of the following is the common symptom of dengue fever?
a) Sore throat
b) Rash
c) Joint pain
d) None of the above

6) Which of the following is a vaccine-preventable vector-borne viral disease? 

a) Yellow fever 

b) Malaria 

c) Chikungunya 

d) Lyme disease

7) Which of the following statement is true regarding the West Nile virus?
a) Transmitted by the bite of ticks
b) Early symptoms are cold and cough
c) It is a Flavivirus
d) The virus spreads from person to person

8) A 19 years old boy from Delhi, India suddenly developed a high fever with a headache, stomach ache, other symptoms included vomiting and diarrhea. 

When examined, dengue fever was suspected, which of the following statement is not correct about the dengue virus?
a) Transmission to humans is via ticks
b) Prevalent in tropical and subtropical regions of the world
c) More than one antigenic type of virus is present
d) Belongs to the family Filovirus

9) All of the following statements are true about rodent-borne viral infections, Except?
a) Caused by bunyaviruses and arenaviruses
b) Hantavirus infections and Lassa fever are major rodent-borne viral infections
c) Human to human transmission is possible
d) None of the above

10) Which of the following statement is True regarding the transmission of the virus causing Lassa fever?
a) Transmitted to humans by the bite of ticks
b) The virus is prevalent in Asian countries
c) Severe symptoms include fever, headache, vomiting and bleeding
d) Person to person transmission does not occur

11) Yellow fever is caused by a flavivirus, the person infected develops jaundice with back pain and headache with fatal infections causing bleeding from the nose and mouth. 

Which of the following statement is not correct about yellow fever?
a) Rodents are the vector of the virus

b) Prevalent in the tropical and subtropical area of Africa and South America
c) Liver infection and jaundice are the primary symptoms
d) Preventable by vaccination in endemic regions

12) All of the following statements regarding Hantavirus pulmonary syndrome (HPS) are true, Except?
a) Can cause life-threatening respiratory infection
b) No vaccine or drug is available for the virus
c) Transmission to humans by infected rodents and their droppings
d) Prevalent only in Asian parts of the world 

13) Ebola virus causes hemorrhagic fever in humans and is often fatal, all of the following are the characteristics of the infection caused by the virus, Except?
a) Person to person transmission is possible
b) The virus belongs to the family Flaviviridae
c) It is highly virulent in humans and nonhuman primates
d) The vaccine is available for the virus

14) Japanese B encephalitis, dengue, and West Nile fever all belong to the genus Flavivirus?
a) True
b) False

15) Chikungunya virus infection has been spreading throughout America in recent years, the virus is transmitted to humans via mosquito bites. 

Which of the following is a common symptom of this infection?
a) Joint pain
b) Loss of vision
c) Yellowing of the skin
d) Bleeding from the nose

16) The mosquito-borne Zika virus outbreak was declared an epidemic mainly in which of the following regions?

a) Europe

b) China and India

c) Brazil and North America

d) South Africa and Ghana

17) All of the following vector borne virus causes viral hemorrhagic fever, except?

a) Lassa fever

b) Dengue fever

c) Rift valley fever

d) Malaria

 

Answers with Explanation:

1-b) Lassa fever, it occurs through direct or indirect contact with infected rodents.
2-c) Mosquitoes
3-a) All viruses of the family have a single-stranded RNA genome
4-a) Herons
5)- c) Joint pain
6- a) Yellow fever
7-c) It is a flavivirus, transmitted by the infected mosquitoes. Primary symptoms include fever, headache, eye pain
8-a) Transmission is via ticks
9-d) None of the above

10-c)Severe symptoms include fever, headache, vomiting and bleeding

Transmitted to humans through contact with the urine or feces of infected rodents, prevalent in West Africa, person to person transmission may occur through exposure to excretions of a Lassa virus infected individual or through infected blood, secretions.

11-a) Rodents are the vector of the virus. It is transmitted to humans by the bite of mosquitoes, can cause severe hemorrhagic fever, jaundice and liver damage.

12-d) Prevalent only in Asian parts of the world. People all around the world are infected including Europe, Asia and U.S.A

13-b) The virus belongs to the family Flaviviridae
14-a) True

15-a) Joint pain

16- c)Brazil and North America

17- d) Malaria