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

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A viral disease of poultry is:

  1. Coryza

  2. New castle disease

  3. Pasteurellosis

  4. Salmonellosis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Newcastle disease is an infection of domestic poultry caused by the Newcastle disease virus (NDV).
Coryza is an infectious disease is caused by the bacterium Haemophilus paragallinarum.
Pasteurellosis is an infection caused by the bacterial genus Pasteurella, which is found in humans and other animals.
Salmonellosis is caused by the bacterium Salmonella.
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Which of the following disease is not related with fisheries?

  1. Fin rot

  2. Gill rot

  3. Dropsy

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

Anthrax is a highly contagious and infectious soil-borne disease caused by Bacillus anthracis, a relatively large spore-forming bacteria that can infect mammals. Anthrax is primarily a disease of herbivores, particularly bison and beef cattle. Anthrax infections are rare in humans. Beef cattle and bison are most likely to contract the disease because they graze lower to the ground than many other herbivores, often due to drought or management practices. It is also believed that the abrasive forages they consume can injure the mouth and allow the bacteria quick access to the bloodstream. 

So the correct option is D, Anthrax

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Infectious diseases are also caused by ____ and _____

  1. Bacteria

  2. Viruses

  3. Above both options are correct

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct answer is 'Above both options are correct'

Infectious diseases are the ones which spread from one person to another by a causative organism which can be bacterial, virus , fungi , parasites etc.

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A disease that infects camel is

  1. Pullorum

  2. Surra

  3. Rinderpest

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

Among camels, trypanosomiasis is sometimes also referred to as surra. It is caused by Trypanosoma evansi, present in most areas where camels are found. Surra in camels is usually a chronic wasting disease. Striking clinical symptoms develop a month or so after infection, with acute bouts of fever, associated with dullness, lack of appetite and lacrimation, coinciding with peaks of high parasitaemia. Gradually the animal loses condition, the hump shrinks and progressive weakness becomes noticeable. Oedemas may occur. 

Therefore, the correct answer is option B.

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Put a tick mark against the correct alternative in the following statements :
Which one of the following is a bacterial disease of cattle in which the animal gets swelling on body parts, especially on the neck ?

  1. Cow pox

  2. Anthrax

  3. Salmonellosis

  4. Rinderpest
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice evs production of food from animals dairy farm management cattle farming uses of animals contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

Select the viral disease of cattle.  

  1. foot and mouth disease of cattle

  2. anthrax

  3. aspergillosis

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

Foot and mouth disease is an infectious and fatal viral disease that affects domestic and wild cows. The viral causes, high fever for two to three days. It is a severe plague for animal farming.

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If a cattle is showing increased respiration and blood mixed foamy discharge from mouth, nose and anus, it is likely to be suffering from

  1. Rinderpest

  2. Mad cow disease

  3. Ranikhet

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

Anthrax is a fatal disease which commonly effects humans and cattle. It is caused by spores of bacteria Bacillus anthracis. These spores remain in soil for decades and are also found in bloody discharges of infected animals and can spread to other animals easily.

Clinical signs depend on species of cattle effected. If infection occurs through mouth or nose the symptoms are shown immediately and death occurs rapidly. If infection occurs through skin there will not be acute symptoms but later becomes generalized. If infection is less acute symptoms may be having difficulty in breathing, tremble, collapse and die. Nearby death blood oozes from openings of animal. When infection is localized to throat area, the neck swells and bloody discharge comes from mouth. 

So, the correct answer is 'Anthrax'.


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Anthrax is a serious disease of

  1. Cattle

  2. Poultry

  3. Fish

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

Anthrax is a serious infectious disease caused by gram-positive, rod-shaped bacteria known as Bacillus anthracis. Anthrax can be found naturally in soil and commonly affects domestic and wild animals around the world. Domestic and wild animals such as cattle, sheep, goats, antelope, and deer can become infected when they breathe in or ingest spores in contaminated soil, plants, or water. People get infected with anthrax when spores get into the body. 

Therefore, the correct answer is option A.

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Put a tick mark against the correct alternative in the following statement:
Which one of the following is a viral disease of poultry?

  1. Ranikhet disease

  2. Cholera

  3. Coryza

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

  • Ranikhet disease is a disease caused by viruses. It is the most fatal disease of poultry. 
  • Cholera and coryza are bacterial diseases.
  • Aspergillosis is a fungal disease.
Hence, the correct answer is 'Ranikhet disease'

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In which of the following disease, yellow pigmentation of skin is seen?

  1. Jaundice

  2. Chickenpox

  3. Plague

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

Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by high blood bilirubin levels. This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma is normally below 1.2 mg/dL (<25µmol/L). A concentration higher than approx. 3 mg/dL (>50µmol/L) leads to jaundice.

Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.

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Epidemic jaundice can occur in which of the following conditions?

  1. Hepatitia A

  2. Hepatitia B

  3. Hepatitia C

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

Hepatitis A is a disease caused by infection from the hepatitis A virus (HAV). HAV has been called as epidemic hepatitis, epidemic jaundice, infectious hepatitis, catarrhal jaundice, HA and type A hepatitis in the past.
Therefore, the correct answer is option A.

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Diarrhea can be caused by 

  1. Bacteria

  2. Virus

  3. Both A and B

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

Diarrhea is a condition that’s characterized by the appearance of loose, watery stools or a frequent need to have a bowel movement. Diarrhea can be related to a viral or bacterial infection, or it can be the result of food poisoning. Rotavirus, norovirus and adenovirus are the common viruses which causes diarrhea. Campylobacter, Shigella are the common bacterias which causes diarrhea. Hence option C is correct.

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Diarrhoea:: Constipation :: Enteritis:: 

  1. Diarrhoea

  2. Typhoid

  3. Tetanus

  4. Malaria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Diarrhoea is a condition in which faeces are discharged from the bowels frequently and in a liquid form. 
  • Diarrhoea is one of the most common health complaints. It can range from a mild, temporary condition, to a potentially life-threatening one. 
  • Most cases of diarrhoea are caused by an infection in the gastrointestinal tract. The microbes responsible for this infection include:
  1. bacteria
  2. viruses and
  3. parasitic organisms
So, the correct answer is 'diarrhoea'.
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The jaundice is a physiological liver disease. It is most commonly caused by a

  1. Bacterium

  2. Virus

  3. Both A and B

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

Jaundice is a disease which causes yellowing of skin and eyes which occurs due to the presence of the excess of pigment bilirubin. Pigment bilirubin is formed in the body as a result of the breakdown of worn out RBCs in the liver and is regularly excreted through kidneys. Jaundice occurs if the liver is not able to metabolize bilirubin and is caused by the virus. It can also lead to inflamed liver or obstructed bile duct. Too much bilirubin can leak into the tissues and causes yellowing of skin and eyes.

Thus, the correct answer is option B.