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 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'.

Multiple choice evs let's clean together cleanliness who will do this work? personal and public cleanliness

Which of the following diseases can be prevented with proper sanitation?

  1. Malaria

  2. Dengue

  3. Cholera

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

Lack of sanitation results in contamination of water, food and soil. Proper sanitation practices will result in proper disposal of waste and reduce contamination of water and food to a large extent. The list of diseases that could be reduced with proper access to sanitation and hygiene practices is very long some of which can be Hepatitis, cholera, dengue, malaria, malnutrition, typhoid etc. Polio is another disease which is related to improper sanitation and hygiene. 

Therefore, the correct answer is option D.

Multiple choice evs let's clean together cleanliness who will do this work? personal and public cleanliness

Fecal transmission of diseases can be reduced by

  1. Medical check-up

  2. Frequent hand washing

  3. Both B and D

  4. Proper sewage disposal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fecal or oral transmission can be prevented by proper sewage treatments, water filtration before use, thorough hand washing, good hygiene practices, and public awareness, etc. Therefore, (c) is the correct answer.

Multiple choice biology animals in daily life animal breeding animal husbandry and its importance introduction to animal husbandry

Bird flu is also known as

  1. Avian influenza.

  2. Hepatitis A.

  3. Hepatitis B.

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

Avian influenza caused by infection with avian (bird) influenza (flu) Type A viruses. These viruses occur naturally among wild aquatic birds worldwide and infect domestic poultry and other bird and animal species. 

So, the correct answer is 'Avian influenza'

Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

Prolonged use of seeds of Lathyrus sativus causes a debilitating disorder due to presence of

  1. Amygdalin

  2. Cyanogenic glucosides

  3. Neurotoxin

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

Lathyrism is a disease caused by eating seeds of species of Lathyrus (the grass pea), mainly L. sativus (the chickpea or khesari), L. cicera (flat-podded vetch) and L. clymenum (Spanish vetchling). It affects mostly people in Bangladesh, India, Pakistan, Nepal and Algeria but is sometimes found in France, Italy, Spain and Australia. This disease affects horses and cattle as well as in man.
Beta-Oxalyl-amino-L-alanine acid (BOAA), an excitatory neurotoxin and glutamate agonist, has been identified as the constituent of the chick pea responsible for the disease. BOAA appears to exert its effects through mitochondrial toxicity.
Prolonged use of seeds of Lathyrus sativus causes a debilitating disorder is not due to presence of glucodsinolates, amygdalin and cyanogenic glucosides. 
Therefore, the correct answer is option C.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

A fungus which grows on a host but can also subsist on organic matter is

  1. Obligate parasite

  2. Obligate saprophyte

  3. Facultative saprophyte

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

A facultative saprophyte is an organism that is primarily a parasite but can survive as a saprophyte if a living host is unavailable.

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Given below is a list of few sexually transmitted diseases. Identify the diseases caused by bacteria among these.
(i) Gonorrhoea,  (ii) Giardiasis,  (iii) Trichomoniasis,  (iv) Chancroid,  (v) Syphilis

  1. (i) and (ii)

  2. (i), (iv) and (v)

  3. (iii) and (v)

  4. (ii), (iii) and (iv)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gonorrhoea is caused by Neisseria gonorrhoeae. Chancroid, is caused by Haemophilus ducreyi. Syphilis is caused by Treponema pallidum. Giardiasis and trichomoniasis are protozoan diseases.