Tag: protozoa: benefits and harmful effects

Questions Related to protozoa: benefits and harmful effects

An example of protozoan infecting our intestine is ___________

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Plasmodium vivax

  2. Entamoeba histolytica

  3. Trypanosoma gambiense

  4. Taenia solium

Show answer
Correct Option: A

The aural organism for African sleeping sickness is

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Trypanosoma cruzi

  2. Trypanosoma rhodesiense

  3. Trypanosoma tangela

  4. Trypanosoma gambiense

Show answer
Correct Option: D
Explanation:
African trypanosomiasis, also known as sleeping sickness, is an insect-borne parasitic disease of humans and other animals. It is caused by protozoa of the species Trypanosoma brucei. There are two types that infect humans, Trypanosoma brucei gambiense (TbG) and Trypanosoma brucei rhodesiense (TbR). Trypanosoma brucei gambiense causes 97% of human cases of sleeping sickness.

So, the correct answer is 'Trypanosoma gambiense'.

Entamoeba coli causes

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Pyorrhoea

  2. Diarrhoea

  3. Dysentery

  4. None of the above

Show answer
Correct Option: D
Explanation:
Entamoeba coli is a non-pathogenic species of Entamoeba that frequently exists as a commensal parasite in the human gastrointestinal tract.

So, the correct answer is 'None of the above'.

Trypanosomiasis is transmitted by 

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Housefly

  2. Mayfly

  3. Tse-tse fly

  4. Fruit fly

Show answer
Correct Option: C
Explanation:

Trypanosomiasis is a term which describes various diseases which affect men and cattle. While Trypanosoma gambiense is the milder form, Trypanosoma rhodesiense is one which afflicts more. This deadly parasitic infection is commonly called as sleeping sickness, is transmitted in man by the bite of the infected Tsetse fly of genus Glossina and family Glossinidae that inhabits the mid continental Africa between Sahara and Kalahari deserts.

Infection of Entamoeba histolytica is prevented by

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Avoiding kissing

  2. Avoiding clothes of patient

  3. Uncontaminated food

  4. None of the above

Show answer
Correct Option: C
Explanation:
Ingestion of fecally contaminated food or water is the primary mode of transmission.  Thus, reducing this contamination is the best method of prevention.  Filtering or purifying drinking water (iodine or boiling) in endemic areas is important as is the washing of fruits and vegetables that may have been contaminated by the use of nightsoil as fertilizer.  Improved sanitation will help to reduce the liklihood of transmission. Travelers to endemic areas can reduce the risk of infection by drinking bottled water, not using ice cubes in drinks, and washing fruits and vegetables with clean water.

So, the correct answer is 'Uncontaminated food'.

Kala-azar is caused and transmitted respectively by

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Leishmania and Phlebotomus

  2. Trypanosoma and sandfly

  3. Leishmania and tse-tse fly

  4. Trypanosoma and Glossina palpalis

Show answer
Correct Option: A
Explanation:

Kala azar is a parasitic disease next to malaria but along with sleeping sickness this is one of the dangerously neglected diseases of the tropical belt. This disease which is endemic in more than 60 countries attacks the immune system making it nearly fatal.  his disease is transmitted to human beings by the bites of infected phlebotomine sandflies which is the vector for  the leishmania parasite. so, the correct answer is option A.

House fly is not the vector for the transmission of

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Leprosy

  2. Dysentery

  3. Typhoid

  4. Sleeping sickness

Show answer
Correct Option: D
Explanation:

Sleeping sickness is transmitted by Tse-tse fly. Leprosy is an ailment of the skin and housefly can spread the causative agent. Dysentery can be spread by housefly when they sit on infected materials like stool and contaminate water as well as food. Typhoid is caused by bacteria, housefly can spread it when infected sputum and clothes are infested with houseflies and contaminate food and water. So, the correct answer is option D.

'Glossina palpalis' is a vector for

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Dengue

  2. Filariasis

  3. Gambian fever

  4. Plague

Show answer
Correct Option: C
Explanation:

Gambian fever or Gambian sleeping sickness is caused by a protozoan Trypanosoma gambiense and is transmitted by Glossina palpalis (tse-tse fly).

Tsetse fly is a vector for sleeping sickness, which transmits the infective stage of which of the 

following parasite?

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Leishmania donovani

  2. Plasmodium falciparum

  3. Trypanosoma gambiense

  4. Wuchereria bancrofti

Show answer
Correct Option: C
Explanation:

Trypanosoma gambiense causes sleeping sickness and is transmitted by tse-tse fly. Leishmania donovani (please note the spelling) causes kala-azar and is transmitted by Sand fly. Plasmodium falciparum causes malaria and is transmitted by the female anopheles mosquito. Wuchereria bancrofti causes elephantiasis and is transmitted by culex mosquito. So, the correct answer is option C.

Which of the following set is of vector host?

zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

  1. Sandfly, deer fly, tse-tse fly and housefly

  2. Frog, lizard, snack and rabbit

  3. Leishmania, sandfly, Trypanosoma and tse-tse fly

  4. Sandfly, frog and housefly

Show answer
Correct Option: A
Explanation:

Vector host is an agent that transmits the pathogens of infectious disease from one living organism to another and may be a person, animal or microorganism. While the Anopheles mosquito is the vector for malarial parasites, sandfly is a vector for leishmaniasis, tsetse fly are vectors of trypanosomes that causes trypanosomiasis or sleeping sickness. Houseflies on the other hand are vector for nearly 100 pathogens that causes, typhoid, cholera, salmonellosis, tuberculosis, anthrax etc., eer flies which belong to the genus Chrysops are vectors for pathogens that causes diseases such as anthrax, tularemia and loa loa filariasis.

Therefore, the correct answer is option A.