Biology ยท 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

What were some of the diseases that spread among enslaved Africans on slave ships?

  1. Smallpox

  2. Measles

  3. Yellow fever

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

Enslaved Africans were exposed to various diseases on slave ships, including smallpox, measles, yellow fever, and other infectious diseases, contributing to the high mortality rate.

Multiple choice

Which of the following is an example of an endoparasite?

  1. Tapeworm

  2. Lice

  3. Fleas

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

Tapeworms are endoparasites that live inside the digestive tract of their hosts.

Multiple choice

What is the term for the stage of a parasite's life cycle when it is outside the host?

  1. Invasive stage

  2. Infective stage

  3. Trophic stage

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

The infective stage is the stage of a parasite's life cycle when it is outside the host and capable of infecting a new host.

Multiple choice

Which of the following is an example of an ectoparasite?

  1. Tapeworm

  2. Lice

  3. Fleas

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

Lice are ectoparasites that live on the skin of their hosts.

Multiple choice

What is the term for a parasite that parasitizes another parasite?

  1. Hyperparasite

  2. Endoparasite

  3. Ectoparasite

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

A hyperparasite is a parasite that parasitizes another parasite.

Multiple choice

Which of the following is an example of a hyperparasite?

  1. Tapeworm

  2. Lice

  3. Fleas

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

Ichneumon wasps are hyperparasites that parasitize other insects.

Multiple choice

What are the three main types of parasites?

  1. Endoparasites, ectoparasites, and hyperparasites

  2. Protozoans, helminths, and arthropods

  3. Bacteria, viruses, and fungi

  4. Plants, animals, and fungi
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The three main types of parasites are endoparasites, ectoparasites, and hyperparasites.

Multiple choice

Which vector-borne disease is most prevalent in India?

  1. Malaria

  2. Dengue

  3. Chikungunya

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

Malaria is the most prevalent vector-borne disease in India, with an estimated 1.5 million cases reported annually.

Multiple choice

What is the primary mode of transmission for dengue fever?

  1. Mosquito bites

  2. Airborne transmission

  3. Water contamination

  4. Direct contact with an infected person
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dengue fever is primarily transmitted through the bites of infected Aedes mosquitoes.

Multiple choice

What is the primary mode of transmission for kala-azar?

  1. Sandfly bites

  2. Mosquito bites

  3. Water contamination

  4. Direct contact with an infected person
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Kala-azar is primarily transmitted through the bites of infected sandflies.

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.