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 geography life in tropical and subtropical regions drainage system in brazil human environment interactions - the tropical and the subtropical region study of continents - south america life in the ganga - brahmaputra basin

Quinine which is prepared from the bark of the Cinchona tree can act as a remedy for which disease?

  1. Diarrhea

  2. Typhoid

  3. Malaria

  4. Hepatitis b
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Medicinal plants have been used in the treatment and prevention of malaria in various parts of the world. Quinine extracted from the bark of the cinchona tree is used as an antimalarial agent.

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

Which of the following nematodes are parasitic to humans? 

  1. Ascaris

  2. Earthworm

  3. Both A and B

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

Ascariasis is a disease caused by the parasitic roundworm Ascaris lumbricoides. These are long, slender, tapered at both the ends. The body is covered with a thick cuticle secreted by a cellular or syncytial epidermis. The life cycle of Ascaris involves only one host. The man is a definitive host for worm and is present in the gastrointestinal tract and fecal matter. Hence, option A is the correct answer. 

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

_________ is a parasite which also causes waterborne disease.

  1. Roundworm

  2. Tapeworm

  3. Both A and B

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

Important class of waterborne diseases are caused by metazoan parasites. Typical examples include certain Nematode, that is to say "roundworms". As an example of waterborne Nematode infections, one important waterborne nematodal disease is Dracunculiasis. It is acquired by swallowing water. Therefore, the correct answer is option A.

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

The eggs of which parasite are bile stained

  1. Ascaris lumbricoides

  2. Ancylostoma duodenale

  3. Enterobius vermicularis

  4. Necator Americans
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
the fertilized eggs of parasite Ascaris lumbricoides is rounded and has a mineral layer that is often stained by bile as they pass through the excreta
So, the correct answer is 'Ascaris lumbricoides'
Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

The pathogen transmitted through female mosquito causing chronic inflammation of the lymphatic vessels of the lower limbs in man is__________

  1. Ascaris sp.

  2. E. histolytica

  3. Streptococcus pneumoniae

  4. W. malayi
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

W.malayi also called as brugia malayi are the important agents of bancroftian and brugian(it is sometimes referred to as Malayan)filariasis. In contrast to many other mosquito-borne infections of medical significance, lymphatic filariae are transmitted by not just one but by several genera of mosquitoes.

So, the correct option is 'W.malayi'.

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

The difference between Culex and Anopheles is

  1. Culex sits antiparallel to the substratum

  2. Anopheles sits at an angle to the substratum

  3. Anopheles sits parallel to the substartum

  4. Culex sits at an angle to the substratum
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Culex causes filariasis, bird malaria. Its body rests parallel to the surface or substratum. Whereas Anopheles causes malaria. The body is slender and rests at an angle to the surface or substratum.
Therefore, the correct answer is option B.

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

Spread of Malaria can be best controlled by ______________.

  1. Killing adult mosquito only.

  2. Proper medical treatment only.

  3. Making the mosquito breeding places unsuitable for completion of life-cycle.

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

A malaria control method that targets mosquito larvae and pupae as they mature in standing water could be an important supplementary measure in the fight against the disease. Larval source management (LSM) is a method that targets immature mosquitoes, found in standing water before the females develop into flying adults that are capable of transmitting malaria. This is done by permanently removing standing water, for example by draining or filling land; making temporary changes to mosquito habitats to disrupt breeding, for example by clearing drains to make the water flow; or larviciding by adding chemicals or biological larvicides to standing water to kill larvae.

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

Female Anopheles mosquito cannot transmit elephantiasis because 

  1. Filarial worms (microfilaria) do not enter Anopheles mosquito.

  2. Microfilaria worms are digested in the gut of Anopheles.

  3. Anopheles mosquito does not bite humans suffering from filariasis.

  4. Mouth part of Anopheles mosquito are not compatible to microfilaria.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Female Anopheles mosquito is a vector of the parasite called Plasmodium that causes malaria. Female Anopheles mosquito picks up the parasite from infected people when they bite to obtain blood needed to nurture their eggs. It cannot transmit elephantiasis because the filarial worms like wuchararia do not enter Anopheles mosquito.
So the correct answer is 'filarial worms (microfilaria) do not enter Anopheles mosquito'.