Tag: contaminated water spreads disease

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Questions Related to contaminated water spreads disease

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 mouth parts of Anopheles are adapted to

  1. Biting and chewing type feeding

  2. Piercing and sucking type feeding

  3. Chewing type feeding

  4. Sucking type feeding
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Female mosquito have mouthparts that pierce food items to enable sucking of internal fluids. In female mosquitoes, all mouthparts are elongated. The labium encloses all other mouthparts like a sheath. The labrum forms the main feeding tube, through which blood is sucked. Paired mandibles and maxillae are present, together forming the stylet, which is used to pierce an animal's skin. During piercing, the labium remains outside the food item's skin, folding away from the stylet. Saliva containing anticoagulants, is injected into the food item and blood sucked out, each through different tubes.

So, the correct option is B. ( Piercing and Sucking type )

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

Which state of Plasmodium is infective for mosquito?

  1. Sporozoite

  2. Ookinete

  3. Trophozoite

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

The gametocytes are the sexual stages of Plasmodium that develop in human red blood cells. When a mosquito takes a blood meal, it ingests these gametocytes, making them the infective stage of the parasite for the mosquito vector.

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

Fish which eradicates mosquito larvae is

  1. Rohu

  2. Anabas

  3. Clarius

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

The western mosquitofish (Gambusia affinis) is a species of freshwater fish, also known commonly as simply mosquitofish. Mosquitofish were introduced directly into ecosystems in many parts of the world as a biocontrol to lower mosquito populations, which in turn negatively affected many other species in each distinct bioregion. Based on diet, mosquitofish are classified as larvivorous fish. Their diet consists of zooplankton, small insects and insect larvae, and detritus material. Mosquitofish feed on mosquito larvae at all stages of life. Adult females can consume hundreds of mosquito larvae in one day.