Biology · Science General

Disease Causative Agents

2,258 Questions

Disease causative agents questions test your understanding of viral, bacterial, and fungal infections, along with their transmission methods. These are common topics in general science sections of SSC and railways exams. Practice these questions to accurately identify disease pathogens and symptoms.

Viral diseasesFoodborne illnessesDisease transmission methodsExtrinsic disease factorsCommon pathogens

Disease Causative Agents Questions

Multiple choice

Which of the following set of diseases are caused by the protozoans?

  1. Kala-azar, poliomyelitis, chikungunya, amoebiasis

  2. Influenza, poliomyelitis, mumps, chikungunya

  3. Measles, giardiasis, ascariasis, AIDS

  4. Anthrax, malaria, tuberculosis, diphtheria

  5. Kala-azar, giardiasis, balantidiasis, malaria,
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Balantidiasis is a protozoan infection caused by infection with Balantidium coli. Malaria parasites belong to the genus Plasmodium (protozoan). Kala-azar (Leishmaniasis) is caused by Leishmania donovani (protozoan). Giardiasis is caused by microscopic protozoan parasites known as Giardia intestinalis.

Multiple choice

Which of the following set of diseases are caused by nematodes?

  1. Trypanosomiasis, giardiasis, ascariasis, amoebiasis

  2. Trypanosomiasis, balantidiasis, enterobiasis, filariasis

  3. Filariasis, ascariasis, ancylostomiasis, enterobiasis

  4. Filariasis, balantidiasis, ancylostomiasis, tuberculosis

  5. Filariasis, giardiasis, ancylostomiasis, trypanosomiasis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

All are caused by nematodes. Ascariasis is an infection caused by Ascaris lumbricoides, giant roundworm of humans belonging to the phylum Nematoda. Ancylostomiasis is the condition of infection by Ancylostoma hookworms. Enterobiasis (pinworm infection) is caused by a small, thin, white roundworm called Enterobius vermicularis. Wuchereria bancrofti is a human parasitic roundworm that is the major cause of filariasis.

Multiple choice

Which among the following set of diseases are caused by the different type of bacteria?

  1. Malaria, lockjaw, visceral leishmaniasis, African trypanosomiasis

  2. Anthrax, Egyptian chlorosis, malaria, cholera

  3. Ascariasis, rabies, lockjaw, trypanosomiasis

  4. Tuberculosis, anthrax, tetanus, cholera

  5. Anthrax, tetanus, trypanosomiasis, breakbone fever
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tuberculosis (TB) is an infectious disease that is caused by a bacterium called Mycobacterium tuberculosis. Anthrax is an infection that is caused by the bacteria Bacillus anthracis. Tetanus or lockjaw is a serious infection caused by Clostridium tetani bacteria. Cholera is an acute epidemic infectious disease caused by the bacterium Vibrio cholerae.

Multiple choice

Which of the following diseases are caused by viruses?

  1. Chikungunya
  2. Kala-azar
  3. Enterobiasis
  4. Malaria
  5. Poliomyelitis
  6. Rabies
  7. Tuberculosis
  8. Enterobiasis
  9. Common cold

  1. 1, 2, 3 and 4

  2. 5, 6, 7 and 8

  3. 1, 5, 6 and 9

  4. 5, 7, 8 and 9

  5. 1, 2, 7 and 9
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chikungunya is a viral disease transmitted to humans by infected mosquitoes. Rabies is a viral disease that is spread most often from the bite of a rabid animal to another animal or to a human. Poliomyelitis is a highly contagious infectious disease caused poliovirus. Common cold is a mild viral infection of the nose, throat, sinuses and upper airways.

Multiple choice

Chicken pox is caused by _______.

  1. Dengue virus

  2. Varicella- zoster virus

  3. Rhino virus

  4. Corona virus

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chicken pox is a highly contagious disease caused by the varicella-zoster virus (VZV). Other options like Dengue, Rhino, and Corona viruses cause different illnesses such as dengue fever, the common cold, and COVID-19, respectively.

Multiple choice

Which of the following diseases is/are caused by viroids?

  1. Potato spindle tuber

  2. Cholera

  3. Tobacco mosaic disease

  4. All of the above

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Potato spindle tuber disease is a classic example of a disease caused by a viroid. Cholera is caused by bacteria, and tobacco mosaic disease is caused by a virus.

Multiple choice

Oriental sore is caused by

  1. bacteria

  2. virus

  3. protozoan

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

Oriental sore (cutaneous leishmaniasis) is caused by the protozoan parasite Leishmania tropica.

Multiple choice

Which of the following is a pair of diseases caused by Gram-positive bacteria?

  1. The clap and Typhoid fever

  2. Cholera and Botulism

  3. Typhoid and Listeriosis

  4. Gonorrhoea and Cholera

  5. Botulism and Listeriosis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, Botulism is a rare and potentially fatal paralytic illness caused by a toxin produced by the Clostridium botulinum (Gram-positive bacterium). Listeriosis is a bacterial infection most commonly caused by Listeria monocytogenes, (Gram-positive bacterium).

Multiple choice

Which of the following diseases is/are caused by viruses with single stranded RNA genome?

  1. Rabies
  2. Breakbone fever
  3. Infantile paralysis

  1. Only 1

  2. Only 2

  3. Only 3

  4. Only 2 and 3

  5. All of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, it is correct. Rabies virus is a neurotropic virus that causes rabies in humans and animals. These viruses are enveloped and have a single stranded RNA genome with negative-sense. Dengue virus single stranded RNA virus of the family Flaviviridae. Poliovirus is composed of an RNA genome and a protein capsid. The genome is a single-stranded positive-sense RNA genome.

Multiple choice

Which one of the following sets of diseases is caused by different types of harmful viruses and mainly affects the human brain?

  1. Rabies, meningitis, encephalomyelitis

  2. Encephalomyelitis, meningitis, Alzheimers

  3. Serum hepatitis, meningitis, rabies

  4. Query fever, Alzheimers, Parkinsons

  5. Influenza, Parkinsons, Huntington's chorea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because this set of diseases is caused by the different types of harmful viruses and mainly affects the human brain.