Biology ยท 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

Which skin infection is caused by the burrowing of the Sarcoptes scabiei mite into the skin?

  1. Scabies

  2. Ringworm

  3. Impetigo

  4. Athlete's foot
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scabies is a contagious skin infestation caused by the Sarcoptes scabiei mite. The mites burrow into the skin, causing intense itching, rash, and small, raised bumps.

Multiple choice

What is the term used to describe the stage in a marine parasite's life cycle when it infects its host?

  1. Inoculation

  2. Infection

  3. Invasion

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

Invasion is the stage in a marine parasite's life cycle when it actively enters its host's body. This can occur through various mechanisms, such as penetrating the host's skin or being ingested by the host.

Multiple choice

Which marine parasite is known for its ability to manipulate the behavior of its host, often leading to increased transmission to new hosts?

  1. Sea lice

  2. Acanthocephalans

  3. Trematodes

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

Trematodes, also known as flukes, are a group of parasitic flatworms that can manipulate the behavior of their hosts. For example, some trematodes can cause their host to become more active or attracted to light, increasing the chances of the parasite being transmitted to a new host.

Multiple choice

What is the term used to describe the process by which a marine parasite transmits from one host to another?

  1. Transmission

  2. Infection

  3. Invasion

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

Transmission is the process by which a marine parasite moves from one host to another. This can occur through various mechanisms, such as direct contact between hosts, ingestion of contaminated food or water, or via an intermediate host.

Multiple choice

Which marine parasite is known for its ability to alter the behavior of its host, leading to increased transmission to new hosts?

  1. Sea lice

  2. Tapeworms

  3. Flukes

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

Some species of flukes, such as Dicrocoelium dendriticum, can alter the behavior of their host, leading to increased transmission to new hosts. For example, D. dendriticum can cause its intermediate host, an ant, to climb to the top of a blade of grass, making it more likely to be eaten by a grazing animal, the parasite's definitive host.

Multiple choice

Which marine parasite is known for its ability to cause severe damage to the gills of fish, leading to respiratory distress and even death?

  1. Sea lice

  2. Tapeworms

  3. Flukes

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

Sea lice, such as Lepeophtheirus salmonis, can cause severe damage to the gills of fish, leading to respiratory distress and even death. They feed on the blood and mucus of the fish, causing irritation and inflammation of the gills. Heavy infestations of sea lice can result in significant economic losses in aquaculture.

Multiple choice

Which pest is responsible for transmitting malaria?

  1. Mosquitoes

  2. Fleas

  3. Ticks

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

Malaria is transmitted by female Anopheles mosquitoes.

Multiple choice

What is the name of the disease transmitted by the bite of an infected blacklegged tick?

  1. Lyme disease

  2. Malaria

  3. Dengue fever

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

Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted through the bite of an infected blacklegged tick.

Multiple choice

Which vector is responsible for transmitting malaria?

  1. Mosquito

  2. Tick

  3. Flea

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

Malaria is transmitted through the bite of an infected female Anopheles mosquito.

Multiple choice

Which of the following is an example of a vector-borne disease?

  1. Influenza

  2. Cholera

  3. Malaria

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

Malaria is a vector-borne disease transmitted through the bite of an infected female Anopheles mosquito.