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

Which of the following is a communicable disease?

  1. Cancer

  2. Malaria

  3. Heart attack

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

Any disease that can be transferred from infected person to healthy is called as communicable disease such as malaria because malaria is caused by Plasmodium and transferred from infected to healthy by the help of vector i.e., mosquitoes. Whereas cancer (caused by abnormal cell growth), Heart attack (caused by abnormal metabolism) and diabetes (caused by abnormal secretion of hormone) are the non-communicable disease

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

Which option is correct for the disease caused by protozoans?

  1. Treponema pallidum - White patches on the tongue or roof of the buccal cavity

  2. Herpes simplex - Itching in the genital or and area

  3. Neisseria gonorrhoeae - Pain during passing urine

  4. Trichomonas vaginalis - Pain during passing urine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Trichomonas vaginalis is an anaerobic protozoan parasite. It causes trichomoniasis. It is a sexually transmitted infection. Symptoms include inflammation, itching and soreness around vaginal area, changes in vaginal discharge like profuse, yellowish to greenish, frothy discharge and pain during passing urine. While Treponema and Neisseria are bacteria Herpes simplex is a virus. Thus, the correct answer is option D.

Multiple choice biology wastewater story basics of water pollution sewage treatment wastewater treatment - need and methods personal and public cleanliness who will do this? water borne disease hygiene - a key to healthy life

Which of the following is not a water borne disease?

  1. Diarrhoea

  2. Typhoid

  3. Hepatitis

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

Diarrhea, typhoid, and hepatitis are classic water-borne diseases. Conjunctivitis is an eye infection typically spread by direct contact or contaminated surfaces, not primarily through drinking water.

Multiple choice biology wastewater story basics of water pollution sewage treatment wastewater treatment - need and methods personal and public cleanliness who will do this? water borne disease hygiene - a key to healthy life

Disease caused by the use of untreated water is

  1. Tuberculosis

  2. Typhoid

  3. Cholera

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Tuberculosis is caused due to Mycobacterium tuberculosis. It is caused due to the infection of lungs due to inhaling the contaminated air.
Typhoid is mainly caused due to bacteria Salmonella typhimurium. The intestine and bloodstream of humans is the main source of proliferation of bacteria. The direct contact with the untreated water containing the feces of an infected person is the main cause of the spread of the disease. 
Cholera is a disease which causes severe dehydration due to infection of the bacterium called Vibrio cholerae. Consumption of contaminated food and water mainly causes the disease. 
So, the correct answer is option D.
Multiple choice biology classification of plants monera five kingdoms of living organisms biodiversity and need of classification

Syphilis causing bacterium Treponema pallidum belongs to the group

  1. Rickettsiae

  2. Bacillus

  3. Actinomycetes

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

Treponema pallidum is a motile spirochaete bacterium that causes sexually transmitted disease syphilis.  It is a helically coiled microorganism. It belongs to the group Spirillum. It is a gram-negative bacteria. 

Thus, the correct answer is 'Spirillum'.

Multiple choice biology human health and disease drug, tobacco and alcohol consumption addiction and dependence community health and hygiene

Liver-cirrhosis is caused by

  1. Excess alcoholism

  2. No alcohol

  3. Due to bacterial infection

  4. Due to viral infection
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cirrhosis is an abnormal liver condition in which there is irreversible scarring of the liver. The main causes are sustained excessive alcohol consumption and fatty liver disease. Symptoms include loss of appetite, yellowing of the skin, fluid retention (oedema) and swelling in ankles, legs and abdomen. So, the correct answer is option A.

Multiple choice evs who will do this? personal and public cleanliness basics of water pollution sewage treatment

An example of water-borne disease is 

  1. Scabies

  2. Influenza

  3. Trachoma

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

Typhoid is a classic example of a water-borne disease caused by the bacterium Salmonella Typhi, typically spread through contaminated water or food. Scabies is a skin infestation, influenza is respiratory, and trachoma is an eye infection.

Multiple choice oil, fibres, spices and medicine producing plants plant kingdom and the environment around us some important plants uses of plants as medicine

Nobel prize for medicine was given for confirming the role of Helicobacter pylori in causing

  1. Bronchitis

  2. Peptic ulcer

  3. Nephritis

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

Helicobacter pylori is a spiral shape bacteria that resides in the digestive tract ad attacks the stomach lining. It is responsible for peptic ulcers. It was discovered my Marshall and Warren in the stomach of patients with ulcers and so they were awarded nobel prize in 2005. 

Thus, the correct answer is option B. 

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

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.
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

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

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

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.

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

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.

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

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
B Correct answer
Explanation

Anthrax is a serious bacterial disease caused by Bacillus anthracis that affects cattle and other livestock, characterized by fever, swelling on various body parts especially the neck and chest, and sudden death. Cow pox and Rinderpest are viral diseases, and salmonellosis is a gastrointestinal bacterial infection without this specific localized neck swelling presentation.