Biology · General Awareness

Disease Vectors and Pathogens

820 Questions

Disease vectors and pathogens examine how organisms like Plasmodium and Leishmania transmit infections. Test items require matching vectors to specific diseases. Studying these life cycles is essential for scoring well.

Plasmodium infective stagesDisease transmission modesDisease vectors and fleasIntracellular parasitesElephantiasis causes

Disease Vectors and Pathogens Questions

Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

We should not allow mosquitoes to breed in our surroundings because they

  1. Multiply very fast and contaminate food

  2. Are vectors for many diseases.

  3. Bite and cause skin diseases.

  4. Are not important insects.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mosquitoes cause more human suffering than any other organism. Mosquito acts as a vector for the bacteria and viruses, responsible for the diseases such as malaria, dengue, encephalitis and yellow fever etc. When mosquito bites a human it causes severe skin irritation through an allergic reaction to the mosquito's saliva, this is what causes the red bump and itching.

Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

Vector of malarial parasite is____________.

  1. Male Culex

  2. Female Anopheles

  3. Female Aedes

  4. Female Culex
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Malaria is caused by Plasmodium parasites. The parasites are spread to people through the bites of infected female Anopheles mosquitoes, called "malaria vectors."

So, the correct answer is 'Female Anopheles'.
Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

Which of the following pair is correct?

  1. E. Coli - parasitic

  2. Culex - elephantiasis

  3. Bed bug - kala-azar

  4. Plasmodium - sleeping sickness
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Elephantiasis is painful, swelling of the legs and genital organs. It is a classic sign of late-stage disease. It is caused by Culex mosquito which carries filarial worms. 
E.coli lives in our intestine and it is not parasitic.
Kala-azar is a parasitic disease transmitted by the bite of infected female sandflies.
Sleeping sickness is a parasitic disease of humans and other animals. It is caused by protozoa of the species Trypanosoma brucei.
So the correct option is 'Culex- elephantiasis'.
Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

Female Anopheles mosquito is carrier of a pathogen that causes

  1. malaria

  2. dengue

  3. yellow fever

  4. filariasis.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Malaria is caused by the toxins produced in the human body by malarial parasite Plasmodium. Malarial parasite is carried from the infected to the healthy persons by the female Anopheles mosquito.

Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

Choose the correct answers from the alternatives given.
In the malarial parasite, oocyst is formed in the:

  1. erythrocytes of man

  2. liver cells of man

  3. stomach wall of the female mosquito

  4. blood of the female mosquito
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The female Anopheles mosquito, when it withdraws blood the infected malarial patient, the male and female gametes enter into the mosquito gut, when the two male and female gametes fuse together and form a zygote, which develops into ookinetes that burrow into the mosquito midgut wall to develop into oocysts.

So, the correct option is 'stomach wall of the female mosquito'.

Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

Choose the correct answers from the alternatives given.
The vector of sleeping sickness is:

  1. house fly

  2. sand fly

  3. mosquito

  4. tsetse fly
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Trypanosoma brucei rhodesiense and Trypanosoma brucei gambiense are the two parasites causes sleeping sickness. Tsetse flies which acts as a carrier of the infection. 

So, the correct option is 'tsetse fly'.

Multiple choice common health problem international health bodies health organisation biology

For which of the following diseases, health organization works at a national level?

  1. Malaria

  2. Dengue

  3. Tuberculosis

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In India, several agencies, institutions and research centres are actively engaged in studying the health problems of the country. These centres are in particular working on the following diseases$:-$

$1$. Malaria

$2$. Dengue

$3$. Leprosy

$4$. Cholera

$5$. Tuberculosis

For each such disease, they undertake a regular survey, identification of the transmitting agent and its breeding places, arranging prophylactic immunization and any other kind of steps to be taken to fight against the respective diseases.

Multiple choice biology classification and variation dna - history and structure biotechnology commercial applications of biotechnology

Intererons have been used in the treatment of

  1. Ascariasis

  2. Influenza

  3. Filariasis

  4. Giardiasis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Interferons (IFNs) are a group of signalling proteins made and released by host cells in response to the presence of several viruses. A virus-infected cell will release interferons causing nearby cells to heighten their anti-viral defences. Interferons are named for their ability to "interfere" with viral replication (multiplication) by protecting cells from virus infections. Hence, interferons are used in the treatment of viral infections such as influenza. Influenza, commonly known as the flu is an infectious disease caused by an influenza virus.

So, the correct answer is 'Influenza'.

Multiple choice poster writing english

Which of the options may be included in a poster on the given topic:

The prevention of the spread of malaria

  1. You can help prevent the spread of malaria

  2. Malaria is a disease that spreads through the bite of a mosquito...

  3. Stop Malaria!

  4. How can you prevent Malaria? There are several steps...
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Posters are placards displayed in public announcing and advertising something. The purpose of a poster is either to create social awareness or to advertise or even extend public invitations and display notices.
The correct answer is Option C. This poster here, is to create awareness against malaria.  'Stop Malaria' makes a perfect eye-catching heading for the poster. The posters have important information in persuasive language. Slogans make an important part of the posters. Details and formal language is avoided in a poster to retain compactness.
Options A, B and D are incorrect as they do not adhere to the format of poster making.

Multiple choice biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi diseases and immunity classification of microbes useful and harmful microbes harmful microorganisms five kingdoms of living organisms

Dengue fever is transmitted by

  1. Aedes aegypti

  2. Culex fatigans

  3. Anopheles

  4. Aedes donovoni
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dengue fever is a mosquito-borne disease caused by the dengue virus. There is a characteristic skin rash that is similar to measles. It is transmitted by several species of mosquito within the genus Aedes, mainly Aedes aegypti.
Therefore, the correct answer is option A.

Multiple choice biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi diseases and immunity classification of microbes useful and harmful microbes harmful microorganisms five kingdoms of living organisms

The vector of 'break bone fever' is

  1. Culex

  2. Aedes

  3. Anopheles

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Break bone fever is another name for dengue fever. It is a mosquito-borne tropical disease caused by the dengue virus. It is transmitted by several species of the mosquito within the genus Aedes aegypti.
Therefore, the correct answer is option B.

Multiple choice biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi diseases and immunity classification of microbes useful and harmful microbes harmful microorganisms five kingdoms of living organisms

Dengue is transmitted by

  1. Aedes

  2. Male Anopheles

  3. Female Anopheles

  4. Tsetse fly
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aedes aegypti, the principal mosquito vector of dengue viruses is an insect closely associated with humans and their dwellings. People not only provide the mosquitoes with blood meals but also water-holding containers in and around the home needed to complete their development. The mosquito lays her eggs on the sides of containers with water and eggs hatch into larvae after a rain or flooding. A larva changes into a pupa in about a week and into a mosquito in two days.