Biology · General Awareness

Disease Vectors and Pathogens

820 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 classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Aedes aegypti is a vector for

  1. Yellow fever

  2. Dengue fever

  3. Japanese encephalitis

  4. Both A and B.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • A disease vector is an agent who carries and transmits an infectious pathogen into another living organism.
  • Aedes aegypti is known to transmit dengue virus, yellow fever virus, chikungunya virus, and Zika virus.
  • It can be recognized by white markings on its legs and a marking in the form of a lyre on the upper surface of its thorax.
  • Hence Aedes aegypti is a vector for yellow fever and Dengue fever.
  • So, the correct answer is 'Both A and B'.
Multiple choice classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Arbovirus (transmitted by arthropods) causes

  1. Malaria

  2. Dengue

  3. Filariasis

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

  • Arbovirus refers to any viruses that are transmitted by arthropod vectors. Arboviruses can affect both animals, including humans, and plants. 

  • Dengue fever is a mosquito-borne tropical disease caused by the dengue virus. Malaria is a mosquito-borne infectious disease caused by protozoa i.e., Plasmodium species. Filariasis is a parasitic disease caused by an infection with roundworms. Amoebiasis is a protozoal infection caused by Entamoeba histolytica.

  • Hence, Arbovirus caused dengue fever.

  • So, the correct answer is 'Dengue'.

Multiple choice classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Casual organism of dengue is 

  1. Arbovirus

  2. Wuchereria

  3. Anopheles

  4. Culex
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Dengue fever is a mosquito-borne tropical disease caused by the dengue virus.Dengue is spread by several species of a mosquito of the  Aedes Type, principally A.aegypti.
  • .Symptoms typically begin three to fourteen days after infection.[2] This may include a high fever, headache, vomiting, muscle and joint pains, and a characteristic skin rash
  • Arbovirus is an informal name used to refer to any viruses that are transmitted by arthropod vectors. As dengue is transmitted by an arthropod vector(mosquito) its causative organism is called arbovirus.
  • So, the correct answer is 'Arbovirus'.
Multiple choice biology diseases and hygiene anaemia mosquito and human health non communicable diseases

Which of the following is the causative agent of hay fever?

  1. Female Aedes mosquito

  2. Tse tse fly

  3. Plant pollen

  4. Trypanosoma gambiense
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hay fever is also known as seasonal allergy or allergic rhinitis is look like cold and symptoms are also similar like:-

i) Running nose.
ii) Watery, itchy, red eyes (allergic conjunctivitis).

iii) Sneezing
iv) A cough
v) Itchy nose, the roof of the mouth or throat
vi) Swollen, blue-colored skin under the eyes (allergic shiners).
These are caused by tree pollen, grass pollen, ragweed pollen etc.
So the correct option is 'Plant pollen'.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The most common carrier of communicable diseases is

  1. Ant

  2. Housefly

  3. Dragonfly

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

The diseases, which spread from one person to another person or from animal to person are called as communicable diseases. It is also termed as infectious or contagious diseases. Housefly is a major factor in contributing communicable diseases. Housefly comes in contact with waste products and eatables. When it flies from wastes to eatables, it transports bacterial agents from wastes to eatables. Due to consumption of such eatables, the persons infected with microbes of various diseases, person gets sick. 

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Which of the following is the most common carrier of pathogens?

  1. Bees

  2. Mosquito

  3. Housefly

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

House flies are the vectors of several infectious agents. The pathogen may attach with flies when they sit on the waste materials. They cause typhoid, cholera, salmonellosis, dysentery, tuberculosis, anthrax, and parasitic worms carried to human food on the fly’s body parts or in its regurgitations or defecations.

Therefore, the correct answer is option C.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Why are houseflies not considered as biological vectors?

  1. They do not spread diseases

  2. They do not transmit disease directly

  3. They are parasites and not vectors

  4. They transmit the diseases directly
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Houseflies are considered mechanical vectors because they carry pathogens on their bodies and legs, transferring them directly to food or surfaces, rather than the pathogen undergoing a developmental cycle within the fly.

Multiple choice geography natural regions climate and natural vegetation equatorial climatic region natural regions of the world

Which disease is most common in the Equatorial region?

  1. Cholera

  2. Typhoid

  3. Dysentery

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

Tropical diseases encompass all diseases that occur solely, or principally, in the tropics. In practice, the term is often taken to refer to infectious diseases that thrive in hot, humid conditions, such as malaria, leishmaniasis, schistosomiasis, onchocerciasis, lymphatic filariasis, Chagas disease, African trypanosomiasis, and dengue.

Multiple choice geography natural regions climate and natural vegetation equatorial climatic region natural regions of the world

The blood sucking fly called the tsetse in the equatorial region causes __________.

  1. malaria

  2. typhoid

  3. sleeping sickness

  4. dengue
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tsetse, sometimes spelled also known as tik-tik flies, are large biting flies that inhabit much of tropical Africa. The bite leads to transmission of sleeping sickness and nagana.

Multiple choice biology constitutes of diet role of vitamins functions and principal sources of vitamins and minerals need for nutrients

A person suffering from malaria gets fever when

  1. Exoerythrocytic cycle is completed

  2. Signet ring stage is formed

  3. RBC generally ruptured and haemozoin granules are released

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

Rupture of RBC result in septicemia because of release of hematite granules in the blood resulting in characteristic chills and high fever.

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Which is not a parasite of the human intestine ?

  1. ringworm

  2. pinworm

  3. threadworm

  4. tapeworm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
They have long round bodies and range in size. Roundworms can live in or on humans and can cause many problems. They are usually found in soil and stool and can enter the body through the mouth or direct contact with the skin. They can live in the human intestine for a very long time. They are called normal Flora.
So the correct option is 'Ringworm'.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

If all ponds and puddles are destroyed, the organism likely to be destroyed is

  1. Leishmania

  2. Trypanosoma

  3. Ascaris

  4. Plasmodium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The breeding places of this mosquito is ponds, marshes, swampy areas etc. So, if all the ponds and puddles are destroyed. Anopheles will not be able to survive leading to destruction of its parasite, Plasmodium.
So, the correct answer is 'Plasmodium'
Multiple choice types, sources and impact of waste accumulation waste management - impact of waste accumulation our life and environment geography

Kala-azar, also known as black fewer is spread by _____________.

  1. tsetse fly

  2. mosquitoes

  3. sandfly

  4. housefly
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kala-azar known as Black Fever is caused by sandfly bites which exhibits the symptoms of fever, weight loss, enlargement of liver and spleen. If it is not treated at the early stage it proves to be the fatal which could take life of the infected person.