Biology · General Awareness

Disease Vectors and Pathogens

844 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 sexually transmitted diseases stds and infertility reproductive health reproduction biology

Sexually transmitted disease caused by protozoa is 

  1. Candidiasis

  2. Chlamydiasis

  3. Giardiasis

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

Candidiasis is a fungal infection typically on skin or mucous membranes caused by candida . While , Chlamydiasis is a common STD spread by bacteria .Giardiasis is an infection that is caused by a parasite , Giardia lambia .On the other hand , genital warts are small bumps on the genitals caused by a common sexually transmitted infection .
So , the correct option is 'Giardiasis'  .
Multiple choice classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Dengue is caused by 

  1. <p>Female Anopheles</p>

  2. <p>Female Aedes</p>

  3. Male Anopheles

  4. All of the above
Reveal answer Fill a bubble to check yourself
B 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 female Aedes type, principally Aedes aegypti. Symptoms include high fever, headache, vomiting, muscle and joint pains, characteristic skin rash, bleeding, low levels of blood platelets and blood plasma leakage. So, the correct answer is 'Female Aedes'.

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

Aedes spreads 

  1. Malaria

  2. Dengue

  3. Sleeping sickness

  4. Kala-azar
Reveal answer Fill a bubble to check yourself
B 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. Hence Aedes spreads Dengue'.
  • So,the correct answer is 'Dengue'.
Multiple choice classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Which of the following is an incorrect match?

  1. Disease - Pulmonary, Causative organism - Bacterium, Mode of transmission - Airborne and droplet infection

  2. Disease - Gonorrhoea, Causative organism - Bacterium, Mode of transmission - Through sexual contact

  3. Disease - Dengue, Causative organism - Virus, Mode of transmission - Through vector Culex mosquito

  4. Disease - Ringworm, Causative organism - Fungus, Mode of transmission - From clothes of infected person
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dengue is transmitted by the bite of a mosquito infected with one of the four dengue viruses. It is a febrile illness that affects infants, young children and adults with symptoms appearing 3-14 days after the infective bite.
Dengue is not transmitted directly from person-to-person and symptoms range from mild fever, to incapacitating high fever, with severe headache, pain behind the eyes, muscle and joint pain, and rash. There is no vaccine or any specific medicine to treat dengue. People who have dengue fever should rest, drink plenty of fluids and reduce the fever using paracetamol or see a doctor. Dengue is transmitted by several species of mosquito within the genus Aedes, principally A. aegypti.
Severe dengue (also known as dengue hemorrhagic fever) is characterized by fever, abdominal pain, persistent vomiting, bleeding and breathing difficulty and is a potentially lethal complication, affecting mainly children. Early clinical diagnosis and careful clinical management by trained physicians and nurses increase survival of patients.

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

The disease not transmitted by house-fly is 

  1. Dysentery

  2. Cholera

  3. Enteric fever

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

House flies are strongly suspected of transmitting at least 65 diseases to humans, including typhoid fever, dysentery, cholera, poliomyelitis, anthrax, tularemia, leprosy and tuberculosis. Flies regurgitate and excrete wherever they come to rest and thereby mechanically transmit disease organisms. Dengue is transmitted by mosquito.

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

Aedes mosquito is a vector for

  1. Plague

  2. Malaria

  3. Filaria

  4. Encephalitis and Dengue
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aedes is a genus of mosquitoes originally found in tropical and subtropical zones but now found on all continents except Antarctica. Some species of this genus (like Aedes albopictus and Aedes aegypti) transmit serious diseases, including dengue fever, yellow fever, eastern equine encephalitis and chikungunya. So, the correct answer is option D.

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

Dengue fever is spread by

  1. Anopheles

  2. Aedes

  3. Culex

  4. Musca.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Dengue fever is spread through the bite of the female mosquito (Aedes aegypti). 
  • The mosquito becomes infected when it takes the blood of a person infected with the virus. After about one week, the mosquito can then transmit the virus while biting a healthy person.
  • Hence Dengue fever is spread by Aedes.
  • So, the correct answer is 'Aedes'.
Multiple choice classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Aedes is vector of

  1. Plague

  2. Malaria

  3. Filaria

  4. Encephalitis and Dengue.
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 mosquito is known to transmit dengue virus, yellow fever virus, chikungunya virus, Zika virus and Encephalitis(inflammation of the brain).
  • 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 is a vector of 'Encephalitis and Dengue'.
  • So, the correct answer is 'Encephalitis and Dengue'.
Multiple choice classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Aedes is the carrier of

  1. Dengue fever

  2. Relapsing fever

  3. Malaria

  4. None of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The dengue virus is transmitted to humans via the bite of an infected mosquito. Only a few mosquito species are vectors for the dengue virus. The dengue virus is carried and spread by mosquitoes in the genus Aedes, which includes a number of mosquito species. Of these species, the primary vector of the dengue virus is the species Aedes aegypti.

So, the correct answer is 'Dengue fever'.
Multiple choice classification of microbes living world and classification of microbes useful and harmful microbes harmful microorganisms biology

Aedes aegypti is vector of

  1. Yellow fever

  2. Dengue fever

  3. Both A and B

  4. Japanese encephalitis.
Reveal answer Fill a bubble to check yourself
C 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 of Yellow fever and Dengue fever.
  • So, the correct is 'Both A and B'.
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'.