Biology · Science General

Disease Causative Agents

2,531 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

______________ is a viral disease.

  1. Pneumonia

  2. Leprosy

  3. Plague

  4. Influenza

  5. Amoebic dysentery
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Influenza – Viral disease; caused by orthomyxovirus (paramyxovirus).

Multiple choice

What is germ theory?

  1. It states that a disease-causing microorganism should be present in animals infected by the disease and not in healthy animals.

  2. It states that a disease-causing microorganism should be present in healthy animals and not in infected animals.

  3. It states that a disease-causing microorganism should be destroyed.

  4. It states that a disease-causing microorganism cannot be destroyed.

  5. Both 2 and 4 are correct.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Germ theory states that a disease-causing microorganism should be present in animals infected by the disease and not in healthy animals.

Multiple choice

Match the following microorganisms to the diseases caused by them:

Column I
Column II
W. Rhabdovirus 1. Anthrax
X. Bacillus 2. Rabies
Y. Streptococcus 3. Skin infection
Z. Staphylococcus 4. Pneumonia
A. Orthomyxoviridae 5. Influenza

  1. W - 4, X - 1, Y - 3, Z - 2, A - 5

  2. W - 2, X - 1, Y - 4, Z - 3, A - 5

  3. W - 2, X - 1, Y - 3, Z - 4, A - 5

  4. W - 4, X - 3, Y - 2, Z - 1, A - 5

  5. W - 5, X - 1, Y - 4, Z - 3, A - 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rhabdovirus is bullet shaped virus that causes rabies. Bacillus anthracis causes anthrax. Streptococcus pneumoniae is the causative agent of pneumonia. Staphylococcus aureus causes skin infection and Orthomyxoviridae is the family of virus that causes Influenza.

Multiple choice

All of the following diseases are caused by virus, except

  1. typhoid

  2. jaundice

  3. mumps

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

Typhoid fever is a severe infection caused by a bacterium, Salmonella typhi. S. typhi is in the same family of bacteria as the type spread by chicken and eggs, commonly known as salmonella poisoning or food poisoning. S. typhi bacteria do not have vomiting and diarrhea as the most prominent symptoms of their presence in humans. Instead, persistently high fever is the hallmark of S. typhi infection.

Multiple choice

Pea soup diarrhea is the feature of which disease?

  1. Typhoid fever

  2. TB

  3. Cholera

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

Pea soup diarrhea is the feature of Typhoid fever. This is an acute bacterial disease caused by Salmonella typhi. Typhoid germs are passed in the feces and, to some extent, the urine of infected people. The germs are spread by eating or drinking water or food contaminated by feces (or urine) from the infected individual.

Multiple choice

If one can diagnose urethritis and cervicitis, the disease is most likely to be

  1. Bells palsy

  2. Syphilis

  3. Hyper sclerosis

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

If one can diagnose urethritis and cervicitis, the disease is most likely to be Gonorrhea. Most of the time, a urine test can be used to test for gonorrhea. However, if a person has had oral and/or anal sex, swabs may be used to collect samples from the throat and/or rectum. In some cases, a swab may be used to collect a sample from a man's urethra (urine canal) or a woman's cervix (opening to the womb).

Multiple choice

If a woman gets a gonorrhea infection, the most probable site of the infection is

  1. rectum

  2. vagina

  3. cervix

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

Gonorrhea is a sexually transmitted disease (STD) caused by a bacterium. Gonorrhea can grow easily in the warm, moist areas of the reproductive tract, including the cervix (opening to the womb), uterus (womb), and fallopian tubes (egg canals) in women, and in the urethra (urine canal) in women and men. The bacterium can also grow in the mouth, throat, eyes, and anus.

Multiple choice

Which of the following is not a contagious disease?

  1. Thalassemia

  2. Measles

  3. Influenza

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

Thalassemia is an inherited autosomal recessive blood disorder affecting hemoglobin synthesis. It is genetic, not infectious. Measles, influenza, and typhoid are all contagious diseases caused by pathogens (viruses or bacteria) that can spread between individuals.