Biology · General Awareness

Disease Vectors and Pathogens

844 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

Anopheles spread

  1. rabies

  2. malaria

  3. AIDS

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

Female Anopheles mosquitoes are the primary vectors for the transmission of malaria parasites.

Multiple choice

Hepatitis is known as

  1. jaundice

  2. malaria

  3. tumor

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

Hepatitis is an inflammation of the liver. Jaundice, which is the yellowing of the skin and eyes, is a common clinical manifestation of liver dysfunction caused by hepatitis.

Multiple choice

Which of the following organisms cause malaria?

  1. Planaria

  2. Bacillus

  3. Plasmodium

  4. Trypanosoma

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carrier organisms are the organisms which carry disease-causing microorganisms to spread them from an infected person to a healthy person. All the communicable/infectious diseases are transmitted from a diseased to a healthy person through some source. Malaria is the disease for which the carrier organism is female Anopheles mosquito.

Multiple choice

Directions: Read the following information and answer the given question.

The number of dengue cases had increased in Raju‘s community in the last one year. He read in his textbook that the vector causing this disease breeds in stagnant water. He immediately took his friends help and decided to kill the vector causing the disease. They also took help of the nearest municipal office. 

Which of the following are the vector for dengue?

  1. Mosquitoes

  2. Ants

  3. Cockroaches

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

null

Multiple choice

Which of the following is the carrier of Entamoeba histolytica?

  1. Mosquito of genus Anopheles

  2. Cattle

  3. Musca domestica (housefly)

  4. Healthy human host

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Entamoeba histolytica is a protozoan parasite that is responsible for a disease called amoebiasis. Trophozoites migrate to the large intestine, where they live and multiply by binary fission. Both cysts and trophozoites are sometimes present in the faeces. Cysts are usually found in firm stool, whereas trophozoites are found in loose stool. Only cysts can survive longer periods (up to many weeks outside the host) and infect other humans.

Multiple choice

Fever in malaria is due to

  1. entry of sporozoites into blood capillaries

  2. entry of merozoites into liver cells

  3. release of merozoites from red blood cells

  4. entry of cryptomerozoites into red blood cells

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Merozoites exit the liver cells and re-enter the bloodstream and begin a cycle of invasion of red blood cells, known as asexual replication. In red blood cells, they develop into mature schizonts, which rupture, releasing newly formed merozoites. These merozoites then reinvade other red blood cells. It causes fever in malaria.

Multiple choice

Mouthpart of the mosquito is

  1. sucking and piercing type

  2. sponging type

  3. biting and chewing type

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

Mosquitoes have mouthparts which are used for piercing and sucking. The paired mandibles and maxillae are formed into needle-like structures (stylets), which are enclosed by the labium.