Tag: zoology

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Questions Related to zoology

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

Which one of the following is a protozoan disease?

  1. African sleeping sickness

  2. Measles

  3. Cholera

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

African sleeping sickness is a disease which is caused by a parasite which is a protozoa known as Trypanosoma brucei. There are certain flies which get infected by this protozoan. When the infected fly bites the human, there is transmission of the diseases. The fly is native to Africa and hence, the disease is known as African sleeping sickness. 

Thus, the correct answer is 'African sleeping sickness'.

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

The aural organism for African sleeping sickness is

  1. Trypanosoma cruzi

  2. Trypanosoma rhodesiense

  3. Trypanosoma tangela

  4. Trypanosoma gambiense
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Trypanosomiasis is transmitted by 

  1. Housefly

  2. Mayfly

  3. Tse-tse fly

  4. Fruit fly
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Infection of Entamoeba histolytica is prevented by

  1. Avoiding kissing

  2. Avoiding clothes of patient

  3. Uncontaminated food

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Kala-azar is caused and transmitted respectively by

  1. Leishmania and Phlebotomus

  2. Trypanosoma and sandfly

  3. Leishmania and tse-tse fly

  4. Trypanosoma and Glossina palpalis
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

House fly is not the vector for the transmission of

  1. Leprosy

  2. Dysentery

  3. Typhoid

  4. Sleeping sickness
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

following parasite?

  1. Leishmania donovani

  2. Plasmodium falciparum

  3. Trypanosoma gambiense

  4. Wuchereria bancrofti
Reveal answer Fill a bubble to check yourself
C Correct answer
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.