Tag: evs

Questions Related to evs

Which among the following is anti-malaria?

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

  1. Phenol

  2. Quinine

  3. Salol

  4. Aspirin

Show answer
Correct Option: B
Explanation:
  • Quinine and other cinchona alkaloids including quinidine and cinchonine are effective against malaria.
  • So, the correct answer is 'Quinine'.

Female Anopheles mosquito cannot transmit elephantiasis because 

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

  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.

Show answer
Correct Option: A
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'.

Fish which eradicates mosquito larvae is

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

  1. Rohu

  2. Anabas

  3. Clarius

  4. Gambusia

Show answer
Correct Option: D
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.

Which stage of Plasmodium is infective for Mosquito

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

  1. Trophozoite

  2. Gametocyte

  3. Ookinete

  4. Sporozoite

Show answer
Correct Option: B
Explanation:

Gametocyte is infective stage for female anopheles mosquito because optimum temperature for growth of gametocyte is present in their body.

Motile elongate zygote of Plasmodium occurs in

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

  1. Human RBCs

  2. Human liver

  3. Salivary glands of mosquito (Anopheles)

  4. Gut of mosquito (Anopheles)

Show answer
Correct Option: D
Explanation:

The motile zygote formed by fertilization of macro gameteby a micro gameteis called ooKinete. It  occurs in gut of mosquito. 

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

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

  1. Multiply very fast and contaminate food

  2. Are vectors for many diseases.

  3. Bite and cause skin diseases.

  4. Are not important insects.

Show answer
Correct Option: B
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.

Vector of malarial parasite is____________.

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

  1. Male Culex

  2. Female Anopheles

  3. Female Aedes

  4. Female Culex

Show answer
Correct Option: B
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'.

Which of the following pair is correct?

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

  1. E. Coli - parasitic

  2. Culex - elephantiasis

  3. Bed bug - kala-azar

  4. Plasmodium - sleeping sickness

Show answer
Correct Option: B
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'.

State whether the following statements are true or false.
Malaria is caused by female anopheles.

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

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

The causative agent of malaria is Plasmodium vivax and female anopheles act as a vector. 

So, the correct option is 'False'.

Female Anopheles mosquito is carrier of a pathogen that causes

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

  1. malaria

  2. dengue

  3. yellow fever

  4. filariasis.

Show answer
Correct Option: A
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.