Tag: protozoa: benefits and harmful effects

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Multiple choice zoology diseases and hygiene diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Which of the following disease is caused by the bite of mosquitoes?

  1. Dengue fever

  2. Malaria

  3. Cholera

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Dengue fever is transmitted by the bite of Aedes mosquito.
Malaria is transmitted by the bite of the female Anopheles mosquito. The mosquito takes blood meals. During this time it infects the healthy person with the parasite from the previously infected person. Hence mosquitoes act as vectors for the transmission of dengue and malaria.
Thus the correct answer is option D. 
Multiple choice biology diseases and hygiene diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Pigs get infected with Taenia by swallowing

  1. Human faeces

  2. Human faeces with embryophores

  3. Human faeces with hexacanth

  4. Human faeces with onchospheres
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pigs become intermediate hosts for the tapeworm Taenia solium by ingesting human feces containing the eggs (onchospheres), which then develop into cysticerci in the pig's muscles.

Multiple choice biology diseases and hygiene diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

What is measly pork?

  1. The flesh of dead pig

  2. The cooked flesh of pig

  3. The cooked flesh of infected pig

  4. The flesh of living pig
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Measly pork refers to meat that contains the larval stages of the tapeworm Taenia solium. These larvae, known as cysticerci, infect the muscle tissue of the pig, making the meat unsafe for consumption.

Multiple choice biology diseases and hygiene diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Pigs get infected with Taenia by swallowing 

  1. Human faeces with eggs

  2. Human faeces with embryophores

  3. Human faeces with hexacanth

  4. Human faeces with onchospheres
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

If a human gets infected with tapeworm, it's faeces contains tapeworm eggs. If such infected human faeces are consumed by pigs, then they too get infected with tapeworm infection.

So, option D is the correct answer.

Multiple choice biology diseases and hygiene diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

In Taeniasis, humans act as ___________

  1. Intermediate host

  2. Definitive host

  3. Secondary host

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

In the life cycle of Taenia solium, humans are the definitive host because they harbor the adult stage of the tapeworm in their intestine. Pigs act as the intermediate host where the larval stages develop.

Multiple choice biology diseases and hygiene diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Taenia solium and Taenia saginata differ in _____________.

  1. Mode of infection

  2. Intermediate host

  3. Definitive host

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

The definitive host for both lifecycles is humans, but the intermediate hosts are different for each species. A cow is the primary intermediate host for Taenia saginata and a pig is the primary intermediate host for Taenia solium.

Multiple choice biology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

In the life cycle of liver fluke, the sheeps get infected when they ingest ___________.

  1. Encysted cercariae.

  2. Miracidia.

  3. Sporocyst.

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

Sheep become infected with the liver fluke (Fasciola hepatica) by ingesting aquatic vegetation contaminated with encysted cercariae, which are known as metacercariae. The other stages listed are part of the life cycle but are not the infective stage for the final host.

Multiple choice biology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Which of the following is the causative agent of taeniasis?

  1. Pork worm

  2. Flat worm

  3. Round worm

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

Taenia solium also known as tapeworm is a pathogen that causes taeniasis. It enters the human body due to consumption of uncooked pork hence also known as pork worm. Thus, the correct answer is option A.

Multiple choice biology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Which of the following is an intermediate host for Taenia solium?

  1. Mosquito

  2. Pig

  3. Snail

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

The pigs are the intermediate host for Taenia solium they are affected by the ingestion of the eggs. The eggs enter the intestine and penetrate the epithelial and reach the muscles. In muscles, they develop an infection known as Cysticercosis. The humans are affected by eating infected pigs. 

So the correct answer is 'Pig'.

Multiple choice biology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Taeniasis can be treated by 

  1. Penicillin

  2. Itraconazole

  3. Praziquantel

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Taeniasis is an infection by the tapeworm, Taenia solium. It is caused by eating undercooked pork or contaminated food that contains tapeworm eggs or larvae which grow in the intestines when eaten. Praziquantel is the medication used to treat taeniasis because it is an antiworm medicine which prevents the growth and multiplication of worms inside the body. It increases the permeability of the membrane to calcium ions which induces contraction of the parasites, resulting in paralysis in the contracted state.

So, the correct answer is option C.