Question 1

The term infection pertains to the presence of endoparasites and infestation pertains to the presence of ectoparasites.​

Accepted Answer

This statement is true. Infection refers to the presence of parasites inside the body while infestation refers to the presence of parasites outside the body. Endoparasites are parasites that live inside the host organism whereas ectoparasites are parasites that live outside the host organism.

Question 2

​East African trypanosomiasis is also called river blindness and caused by microfilarial worms.

Accepted Answer

East African trypanosomiasis, also known as sleeping sickness, is caused by the protozoan parasite Trypanosoma brucei transmitted by tsetse flies. River blindness, on the other hand, is caused by a different parasite, Onchocerca volvulus, transmitted by black flies.

Question 3

Dengue fever is endemic in southern Canadian and northern U.S.states and transmitted by deer ticks.​

Accepted Answer

Dengue fever is not endemic in Canada or the United States, and it is primarily transmitted by mosquitoes, not deer ticks. Lyme disease, on the other hand, is transmitted by deer ticks and is endemic in parts of Canada and the United States.

Question 4

Parasitic protozoa are capable of developing a protective cyst when environmental conditions are unfavorable.​

Accepted Answer

Parasitic protozoa are capable of developing a protective cyst when environmental conditions are unfavorable, allowing them to survive until conditions become more favorable.

Question 5

Malaria is prevalent in developing countries and transmitted by the fecal-oral route where there is poor sanitation and contaminated drinking water.​

Accepted Answer

Malaria is not transmitted by the fecal-oral route. It is transmitted through the bites of infected mosquitoes. However, poor sanitation and contaminated drinking water can contribute to the spread of other diseases.

Question 6

The mechanism of respiration used by most parasitic protozoa consists of facultative anaerobic processes.​

Accepted Answer

Most parasitic protozoa can live in both aerobic and anaerobic conditions, but they typically use facultative anaerobic processes for respiration. This means that they can switch between using oxygen and alternative electron acceptors depending on the availability of oxygen in their environment.

Question 7

Mosquitoes were the vectors for the disease called bubonic plague which killed millions in the middle ages.​

Accepted Answer

Bubonic plague was actually spread by fleas that infested rats. Mosquitoes can transmit diseases such as malaria and dengue fever.

Question 8

An Ascaris nematode can grow to 12 inches inside the human intestinal tract and have teeth that can chew through the intestinal mucosa to invade the abdominal cavity.​

Accepted Answer

Ascaris nematodes, also known as roundworms, can grow up to 12 inches inside the human intestine and have been known to chew through the intestinal mucosa in rare cases, leading to invasion of the abdominal cavity. This can result in a serious condition called ascariasis.

Question 9

​Pregnant women are advised to avoid exposure to cat litterboxes due to the potential for transmission parasites that cause toxoplasmosis which can harm the developing fetus.

Accepted Answer

This statement is true. Pregnant women are advised to avoid exposure to cat litterboxes as the feces can contain the Toxoplasma gondii parasite, which can cause toxoplasmosis and harm the developing fetus.

Question 10

The only route of transmission of parasites which infect humans is through bites of arthropod vectors.​

Accepted Answer

While some parasites that infect humans can be transmitted through arthropod vectors, others can also be transmitted through contaminated food or water, direct contact with infected animals or their feces, or even from mother to child during pregnancy or breastfeeding.

Quiz 10: Parasites and Vectors

The term infection pertains to the presence of endoparasites and infestation pertains to the presence of ectoparasites.​

​East African trypanosomiasis is also called river blindness and caused by microfilarial worms.

Dengue fever is endemic in southern Canadian and northern U.S.states and transmitted by deer ticks.​

Parasitic protozoa are capable of developing a protective cyst when environmental conditions are unfavorable.​

Malaria is prevalent in developing countries and transmitted by the fecal-oral route where there is poor sanitation and contaminated drinking water.​

The mechanism of respiration used by most parasitic protozoa consists of facultative anaerobic processes.​

Mosquitoes were the vectors for the disease called bubonic plague which killed millions in the middle ages.​

An Ascaris nematode can grow to 12 inches inside the human intestinal tract and have teeth that can chew through the intestinal mucosa to invade the abdominal cavity.​

​Pregnant women are advised to avoid exposure to cat litterboxes due to the potential for transmission parasites that cause toxoplasmosis which can harm the developing fetus.

The only route of transmission of parasites which infect humans is through bites of arthropod vectors.​

The term infection pertains to the presence of endoparasites and infestation pertains to the presence of ectoparasites.

East African trypanosomiasis is also called river blindness and caused by microfilarial worms.

Dengue fever is endemic in southern Canadian and northern U.S.states and transmitted by deer ticks.

Parasitic protozoa are capable of developing a protective cyst when environmental conditions are unfavorable.

Malaria is prevalent in developing countries and transmitted by the fecal-oral route where there is poor sanitation and contaminated drinking water.

The mechanism of respiration used by most parasitic protozoa consists of facultative anaerobic processes.

Mosquitoes were the vectors for the disease called bubonic plague which killed millions in the middle ages.

An Ascaris nematode can grow to 12 inches inside the human intestinal tract and have teeth that can chew through the intestinal mucosa to invade the abdominal cavity.

Pregnant women are advised to avoid exposure to cat litterboxes due to the potential for transmission parasites that cause toxoplasmosis which can harm the developing fetus.

The only route of transmission of parasites which infect humans is through bites of arthropod vectors.