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 evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit

Communicable diseases spread through ___________.

  1. Water

  2. Food

  3. Air

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

There are several ways disease-causing agents get from one person to another:

  • Airborne or droplet infection (e.g. colds, flu).
  • Animal borne or insect borne infection (e.g. rabies, malaria, Lyme Disease).
  • Blood borne infection (e.g. HIV, hepatitis).
  • Food borne or water borne infection (e.g. salmonella, giardia).
  • Sexually transmitted (e.g. chlamydia, gonorrhea, syphilis).
  • Other direct contact (e.g. some kinds of warts, scabies).
  • Indirect contact (e.g. colds and flu carried from person to person on dirty tissues, money, door knobs, phones, computer keyboards).
Multiple choice plant diseases keeping diseases away biology

Which of the following diseases is caused by bacteria?

  1. Tobacco mosaic

  2. Black rot of crucifers

  3. Red rot of sugarcane

  4. Late blight of potato
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Black rot of crucifers is caused by Xanthomonas campestris pv. campestris a bacterial disease common to all cruciferous plants like Broccoli, cabbage, Kale etc. Infecting the stem, leaf, inflorescence and roots.

So, the correct answer is 'Black rot of crucifers'

Multiple choice plant diseases keeping diseases away biology

Which of the following diseases is caused by virus?

  1. Tabacco mosaic

  2. Late blight of potato

  3. Turnip mosaic

  4. Both (a) and (c)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tobacco mosaic virus (TMV) is a rod shaped virus, infecting tobacco leaves. It symptoms are mottled appearance that is patches of yellow and green, dwarfing etc. It spreads by mechanical abrasion of the infected tissue with a healthy one.

Turnip mosaic virus (TuMV) is a virus that causes diseases in members of Cruciferae family. It is spread by aphids.
So, the correct answer is 'Both (a) and (c)'

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Contamination of water with mercury causes which disease ?

  1. Typhoid

  2. Minamata disease

  3. Syphilis

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

The best known example of heavy metal pollution in the oceans took place when Japanese factory discharged a significant amount of mercury metal into Minamata Bay, contaminating the fish stocks there. By that time, many local people had eaten the fish and around 2000 were poisoned. Hundreds of people were left dead or disabled.

Multiple choice zoology diseases and hygiene health introduction to health health and its maintenance

Which of the following diseases is due to an allergic reaction ?

  1. goitre

  2. enteric fever

  3. skin cancer

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

Hay fever is a form of allergy due to the pollen of grasses, trees, and other plants, characterized by inflammation of the membrane lining the nose and sometimes of the conjunctiva.

Multiple choice zoology cell structure and micro-organisms health introduction to health health and its maintenance

____________  is the spread of disease from animal to a person.

  1. Non-communicable

  2. Endemic

  3. Communicable

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

Communicable diseases spread from one person to another or from an animal to a person. The spread often happens via airborne viruses or bacteria, but also through blood or other bodily fluid. The terms infectious and contagious are also used to describe communicable disease. For example- HIV/AIDS. 

Multiple choice zoology why do we fall ill health introduction to health health and its maintenance

Schizophrenia is a .......... disease.

  1. Communicable

  2. Non-communicable

  3. Gene related

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

Schizophrenia is a mental disorder characterized by abnormal social behaviour and failure to recognize what is real. The word schizophrenia translates as 'splitting of mind.' The symptoms include false beliefs, unclear or confused thinking, auditory hallucinations, reduced social engagement and emotional expression and inactivity. It is non-infectious and non-communicable disease. 

Thus the correct answer is option B.

Multiple choice zoology why do we fall ill health introduction to health health and its maintenance

When children play bare footed in pools of dirty water and flood water, they may suffer from diseases like

  1. Leptospirosis and bilharzia

  2. Malaria, amoebic dysentery and leptospirosis

  3. Bilharzia, infective hepatitis and diarrhoea

  4. Guinea worm infection, elephantiasis and amoebic dysentery
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Leptospira is a genus of Spirochaete. It usually spreads from rodents to man. They are excreted in urine. Transmission to man may follow direct contact with urine, blood or tissue from an infected animal or exposure to a contaminated environment. Therefore, the epidemic may result from exposure to flood water contaminated by urine from infected animals. The spirochaete may enter through skin abrasions or even through intact mucus membranes of the mouth, oropharynx or oesophagus on swallowing.
Bilharziasis is the older name of Schistosomiasis. Portal of entry into man is through the skin when wading or swimming in water infested with cercariae larvae
So, the correct answer is 'Leptospirosis and bilharzia'
Multiple choice introduction to twentieth century and world war one the twentieth century and great war history

Why is the 1918 Influenza Pandemic known as Spanish Flu?

  1. It was discovered by Spanish doctors

  2. The flu first occurred in Spain

  3. It hit Spain the hardest

  4. Spain had a free press and was the first to report it
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The 1918 Influenza Pandemic had previously surfaced in the United States and France (where it was known by the code name disease XI), but as both were fighting in World War I, it was kept quiet. Spain, which was neutral, had a free press and so was the first to report the existence of the pandemic.

Multiple choice some infectious diseases infectious diseases health and diseases biology

The bacterial disease cholera is accompanied by 

  1. Peptic ulcers

  2. Rapid loss of fluid from the intestine

  3. Infection of heart muscles

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

Cholera is caused by the bacterium Vibrio cholerae. It can cause severe diarrhea, which comes on suddenly and may quickly cause dangerous fluid loss - as much as a quart (about 1 liter) an hour.
Therefore, the correct answer is option B.

Multiple choice some infectious diseases infectious diseases health and diseases biology

A person is suffering from muscle cramps, vomiting, acute diarrhoea, dehydration and passage of rice water like stool. Which of these diseases has the maximum possibility to occur?

  1. Diptheria

  2. Tuberculosis

  3. Cholera

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

Vibrio cholerae is the bacterium which is responsible for the disease cholera. This is a disease which is transmitted due to contaminated water with feces containing the bacteria. The symptoms of the disease are frequent muscular cramps due to loss of electrolytes in acute diarrhea, vomiting, dehydration, passage of watery stools, etc.

Thus, the correct answer is option C. 

Multiple choice some infectious diseases infectious diseases health and diseases biology

Rehydration therapy is a must for 

  1. Diarrhoea

  2. Cholera

  3. Both A and B

  4. Diarrhoea, Cholera and Dysentry

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

  • Cholera is an infection of the small intestine. The symptom includes large amounts of watery diarrhoea that lasts a few days, vomiting and muscle cramps may also occur. Diarrhoea can be so severe that it leads to severe dehydration and electrolyte imbalance.
  • Diarrhoea is the condition of having at least three loose or liquid bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss.
  • Dysentery is an inflammatory disease of the intestine, especially of the colon, which always results in severe diarrhoea and abdominal pains.
  • Hence, rehydration therapy is a must for diarrhoea, cholera and dysentery.
So, the correct answer is 'Diarrhoea, Cholera and Dysentery'.