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Infection transferred to humans and other animals by blood-feeding arthropods such as mosquitoes, ticks, and fleas causes vector-borne disease. Dengue fever, West Nile Virus, Lyme disease and malaria are examples of vector-borne diseases.
1) Which of the following is not a virus transmitted by mosquitoes?
a) Lassa fever
b) Yellow fever
c) Dengue fever
d) Japanese B encephalitis
The correct answer is option b
Explanation:- Yellow fever is spread by mosquitoes of the Aedes and Haemagogus species and is caused by an arbovirus of the flavivirus genus.
2) What vector is used to transmit encephalitis and yellow fever to humans?
a) Ticks
b) Sandflies,
c) Mosquitoes
d) Rodents
The correct answer is option c
Explanation:-.Arboviruses, which are one of the most common causes of encephalitis, are spread by blood-sucking insects like mosquitoes and less commonly, ticks. Avoiding being bitten is the greatest strategy to avoid becoming infected with a mosquito-borne virus.
3) Except for the following, all of the following statements about arboviruses are correct.
a) They are all single-stranded RNA viruses.
b) They produce arthropod-borne viral illnesses.
c) Viruses are exclusively members of the Arenaviridae family
d) They can infect humans, animals, and plants
The correct answer is option a
Explanation:- Retroviruses are single-stranded RNA viruses that may integrate into the genome of cells, allowing for sustained replication and transmission to all offspring.
4) Japanese B encephalitis is primarily located in Asia and is transmitted via a mosquito bite. Which of the following is the virus’s reservoir?
a) Herons
b) Cattle
c) Cows
d) Rabbits
The correct answer is option a
Explanation:- Virus that causes Japanese encephalitis In Asia, JEV is the most common cause of viral encephalitis. It’s a flavivirus spread by mosquitoes, and it’s in the same genus as dengue, yellow fever, and West Nile viruses.
5) What Arbovirus does not induce human hemorrhagic fever?
a) The Lassa fever virus
b) The Yellow fever virus
c) The Hantavirus
d) The Marburg and Ebola viruses.
The correct answer is d
6) The Bunyaviridae family of viruses can cause infections in people and are transmitted via arthropods or rodents.
Choose all of the right statements about the virus.
a) This family includes the viruses that cause encephalitis and hemorrhagic fever
b) Hantavirus is a member of this family
c) Yellow fever is the most prevalent infection
d) The virus that causes Rift valley fever is passed from animals to people.
The correct answer is option a,b and d
7) Which of the following statements about the West Nile virus is true?
a) Humans contract the virus via a tick bite
b) The virus causes severe hemorrhagic fever
c) The virus is classified as a flavivirus
d) The virus is passed from person to person
The correct answer is option c
Explanation:- Flaviviridae is an enveloped positive-strand RNA virus family that mostly infects mammals and birds. They are spread mostly via arthropod vectors (mainly ticks and mosquitoes).
8) A 19-year-old male from Delhi, India, got a sudden high temperature, headache, and stomach ache, as well as vomiting and diarrhoea.
When dengue infection was suspected, which of the following statements regarding the dengue virus is incorrect?
a) Spreads via ticks
b) Is prevalent in tropical and subtropical regions of the world
c) The virus exhibits many antigenic types
d) Is a member of the Flavivirus family
The correct answer is option a
Explanation:- The bacterium Borrelia burgdorferi causes Lyme disease, which is transmitted to people through the bite of infected blacklegged ticks (Ixodes scapularis). Fever, headache, exhaustion, and erythema migrans, a distinctive skin rash, are all common symptoms.
9) Except for the following, all of the following statements about rodent-borne viral diseases are correct.
a) Caused by bunyaviruses and arenaviruses
b) Major rodent-borne viral infections include hantavirus infections and Lassa fever.
c) Transmission between humans is conceivable
d) None of the above
The correct answer is option d
Explanation:- The flu, the common cold, HIV, and herpes are all instances of communicable viral infections. Viral illnesses spread in different ways, such as through the biting of an infected bug.
10) Which of the following statements about the virus that causes Lassa disease is True?
a) It is spread to people via ticks.
b) Lassa fever is prevalent in Asian nations.
c) Ribavirin is the medicine of choice for Lassa fever treatment.
d) There is no transmission from person to person.
The correct answer is option c
Explanation:-The only Lassa fever medication available is ribavirin. The use of ribavirin is justified by a clinical trial done in the early 1980s. Reanalysis of previously unreported data, on the other hand, suggests that ribavirin may be hazardous to some Lassa fever patients.
11) Yellow fever is caused by a flavivirus; the infected person suffers jaundice, back discomfort, and headaches, as well as deadly infections resulting in nose and mouth bleeding.
Which of the following assertions is inaccurate about yellow fever?
a ) The virus is mostly transmitted by ticks
b) It is prevalent in tropical and subtropical areas of Africa and South America
c)Symptoms include necrotic liver and kidney lesions
d) An attenuated vaccine is available.
The correct answer is option a
12) Except for the following, all of the following statements about Hantavirus pulmonary syndrome are correct.
a) The virus has the potential to cause fatal respiratory infection
b) There is no vaccine or treatment available for the virus
c) The virus is exclusively spread by deer mice
d) The virus can be transferred through eating cow flesh
The correct answer is option d
13) The Ebola virus causes hemorrhagic fever in humans, which is frequently fatal; all of the following are features of the virus’s infection, except?
a) Transmission between people is conceivable
b) the virus is a member of the Flaviviridae family
c) it is extremely contagious in humans and nonhuman primates
d) a vaccine is available for the virus
The correct answer is option b
Explanation:- The Flaviviridae are a family of enveloped RNA viruses that are positive, single-stranded, and enveloped. They are present in arthropods (mostly ticks and mosquitoes) and can infect people on rare occasions.
14) Did you know that Japanese B encephalitis, dengue fever, and West Nile fever all belong to the Flavivirus genus?
a) True
b) False
The correct answer is option a
Explanation:- The Japanese encephalitis virus (JEV) is a flavivirus that is carried by mosquitos and is linked to dengue, yellow fever, and West Nile viruses.
15) In recent years, the Chikungunya virus illness has expanded throughout America; the virus is transmitted to humans by mosquito bites.
Which of the following are the infection’s primary symptoms?
a) Severe leg and arm joint pain
b) Influenza-like symptoms
c) Skin yellowing
d) Nasal bleeding
The correct answer is option a
Explanation:- If you’ve just recovered from Chikungunya Fever but are still experiencing joint discomfort, it could be Chikungunya Arthritis. Post Viral Arthropathy is another name for it.
16) Which of the following regions was declared an epidemic due to the mosquito-borne Zika virus outbreak?
a) Europe
b) China and India
c) Brazil and North America
d) South Africa and Ghana
The correct answer is option c
- Plasmodium’s motile zygote is detected in
(a) Liver of man
(b) RBCs from humans
(c) female Anopheles salivary glands
(d) the female Anopheles’ intestine
The correct answer is option d
- Ascaris illness is spread by
(a) Insect bite
(b) The tse-tse flies
c) eating raw pork
(d) consuming polluted water containing Ascaris eggs
The answer is: (d)
Explanation:-Ingesting the worm eggs causes ascariasis. This can occur when contaminated dirt-covered hands or fingers are placed in the mouth, or while eating vegetables or fruits that have not been thoroughly peeled, washed, or cooked.
- The plague is brought about by
a.) Leishmania donovani
b.) Yersinia pestis
c.) Salmonella typhimuium
d.) Trichinella spiralis
The answer is: (b)
Explanation:- When Y. pestis infects the lungs, it causes pneumonic plague. This epidemic can be transmitted from person to person by the air. If someone breathes in aerosolized bacteria, which may happen in a bioterrorist strike, transmission can occur.
- Which of the following pairs of disease and pathogen is correct?
(a) Wuchereria – Filariasis
(b) Glossina – Kala-azar
(c) Leishmaniasis – Sleeping sickness
(d) Anopheles – Malaria
The answer is: (a)
Explanation:- The filarial nematode Wuchereria bancrofti is the main cause of lymphatic filariasis. It is one of three parasitic worms that invade the lymphatic system to produce lymphatic filariasis, along with Brugia malayi and Brugia timori. A number of mosquito vector species distribute these filarial worms.
- Which of the following is not a disease transmitted by vectors?
a) Yellow fever
b) Dengue fever (b)
(c) Fever caused by a virus
d) Malaria
The answer is: (c)
- Which of the following disease-vector combinations is incorrectly matched?
(a) Anopheles culicifacies – Leishmaniasis
(b) Aedes aegypti dengue fever
(c) Culex pipiens filariasis
(d) Glossina palpalis – Sleeping sickness
The answer is: (a)
Explanation:-Leishmaniasis is caused by the mosquito Anopheles culicifacies. Leishmaniasis is caused by infection with Leishmania parasites, which are disseminated by infected sand flies biting people.
