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 disorders of muscular system disorders of muscle and skeleton movement and locomotion in man locomotion and movements biology

Which one of the following diseases is caused due to immunological disorder against an unknown antigen?

  1. Stroke

  2. Tuberculosis

  3. Rheumatic arthritis

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

  • Rheumatic arthritis is an example of an autoimmune disease that affects the joints.
  • The autoimmune diseases are generated due to the activity of the immune cells against the self-cells. 
  • The immune cells are not able to distinguish between the self and the non-self cells. 
  • There is no known antigen that can provoke the immune cells to show an immune response against the cells of the body. 
Thus, the correct answer is option C. 

Multiple choice evs safety and first aid community health hygiene first aid

Diseases that get transmitted from one person to another is known as

  1. Congenital diseases

  2. Non communicable diseases

  3. Communicable diseases

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

A communicable disease is one that is spread from one person to another through a variety of ways that include: 

  • contact with blood and bodily fluids; 
  • breathing in an airborne virus; or 
  • by being bitten by an insect.
 Some examples of the communicable diseases include Hepatitis A, B & C, influenza, measles, and salmonella and other food-borne illnesses. Hence, Diseases that get transmitted from one person to another is known as Communicable diseases.
 So, the correct answer is 'Communicable diseases'.

Multiple choice common respiratory diseases respiratory disorders respiratory system respiratory system of human biology

Which of the following two diseases together are referred to as chronic obstructive lung disease (COLD) or chronic obstructive airways disease?

  1. Acute bronchitis and chronic bronchitis

  2. Chronic bronchitis and emphysema

  3. Tuberculosis and emphysema

  4. Tuberculosis and chronic bronchitis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  1. Chronic bronchitis is a disease caused by the inflammation of bronchitis which secretes mucous leads to coughing and breathing difficulty and commonly observed in smokers.
  2. Emphysema is a disease in which alveolar sacs get damage which results in the deficiency in the amount of oxygen required by the body and its common cause is also smoking.
When these two diseases found together in a patient it is referred to as chronic obstructive lung disease (COLD) or chronic obstructive airways disease.
So the correct option is 'Chronic bronchitis and emphysema'.

Multiple choice common respiratory diseases respiratory disorders respiratory system respiratory system of human biology

Which of the following virus dosen't cause pneumonia ?

  1. adenovirus

  2. influenza virus

  3. respiratory syntitial virus

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

Pneumonia is an infectious disease of lungs caused by bacteria, fungi, parasites or viruses. Viruses like adenoviruses, Varicella zoster virus, influenza viruses, respiratory syncytial virus cause pneumonia. 

Thus, the correct answer is option D.

Multiple choice common respiratory diseases respiratory disorders respiratory system respiratory system of human biology

Which of the following is not a water borne disease?

  1. Asthma

  2. Cholera

  3. Amoebiasis

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

Cholera is the infection of the small intestine by some strains of the bacteria Vibrio cholerae. The bacteria are transmitted between humans through fecal-oral route, a bite of contaminated food or a sip of contaminated water.
Amoebiasis is an infection caused by the amoebas of the Entamoeba group. Amoebiasis can be transmitted by ingestion of water contaminated with feces containing amoebic cysts.
Asthma, however, cannot be transmitted from person to person.
Therefore, the correct answer is option A.

Multiple choice common respiratory diseases respiratory disorders respiratory system respiratory system of human biology

During _________ blood particles are observed along with sputum or cough.

  1. Typhoid

  2. TB

  3. Hepatitis

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

Tuberculosis is caused by Mycobacterium tuberculosis. It tends to infect the mucous layer of the lungs and causing lung infection. This results in invasion of alveoli releasing blood droplets along with cough.

Multiple choice biology food and health adulteration of food food adulteration food and human health

Which of the following disease is caused by the consumption of adulterated food?

  1. Typhoid

  2. Dropsy

  3. Botulism

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

Oedema is also called dropsy and hydropsy. It is an abnormal accumulation of fluid in the interstitium, located beneath the skin and in the cavities of the body. It occurs due to poisoning by Argemone mexicana. Argemone mexicana seed oil is generally added as an adulterant into the edible oil.

Thus, the correct answer is option B.

Multiple choice biology food and health adulteration of food food adulteration food and human health

Select the correct pair of adulterants and diseases caused by them.

  1. Kesari dal- cancer

  2. Chalk powder- glucoma

  3. Tapioca powder- diarrhoea

  4. Argemone oil- ulcer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Adulteration is a process of mixing undesirable and inferior materials in food. The material or substance which is added to food is called as adulterants. Kesari dal is used as an adulterant in pulses and besan. Kesari dal has dangerous effects on the health including paralysis and cancer. 

Thus, the correct answer is option A.

Multiple choice evs - i drugs effects of smoking smoking tobacco busy at work - our internal organs

Smoking can cause 

  1. Bronchitis

  2. Tuberculosis

  3. Malaria

  4. Influenza
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Chronic bronchitis occurs when the bronchial tubes are constantly irritated and inflamed. When inflammation of the bronchial tubes occurs, the lining of the airways swells and produces an excess amount of mucus. Both of these issues obstruct airflow and make breathing more difficult. Cigarette smoke contains thousands of chemical components. When we breathe in cigarette smoke, the chemicals irritate and activate certain white blood cells (macrophages) and cells that make up the lining of the airways (epithelial cells). This causes the cells to release multiple types of cytokines, which are small signaling proteins that cause the airway lining to thicken and airways to become inflamed. The persistent airway inflammation caused by cigarette smoke can cause a cycle of injury and repair that changes the structure of the airways and makes them narrower.
Therefore, the correct answer is option A.
Multiple choice biology environmental pollution control of water pollution protecting our environment rules are for everyone

What are indicator organisms?

  1. Organisms which cause disease

  2. Organisms which prevent disease

  3. Organisms which analyse sample

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

Indicator organisms are organisms used as a sign of quality or hygienic status in food, dietary supplements, water or the environment for example algal bloom is an indicator of eutrophication. The presence of E.coli is an indicator for water pollution.

So, the correct answer is option C.

Multiple choice hunger and dehydration from tasting to digestion digestion of food digestion evs

ORS is given in case of .................... infection/s

  1. Vibrio cholerae

  2. Entamoeba histolytica

  3. Clostridium botulinum

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

Season change increases the chance of various infection like cholera, dysentery, food poisoning, respiratory tract infections, gastrointestinal infections (acute gastroenteritis) etc which are characterized by the dehydration and diarrhea. The use of oral rehydration solutions (ORS) can help the body to regain lost minerals or electrolyte and water. ORS contain specific concentrations of carbohydrate, sodium, potassium, chloride, base (as citrate, acetate or lactate) with a defined osmolarity (240-300 mOsm/L). ORS function to support the coupled transport of sodium and glucose across the bowel wall (intestinal brush border), along with water, into systemic circulation. Systemic absorption of water and electrolytes is maximized when the ratio of carbohydrate to sodium is approximately 1:1.

Multiple choice common health problem international health bodies health organisation biology

Contagious disease is spread by 

  1. Infected droplets in exhaled air

  2. Mosquitoes or other biting, insects

  3. Contaminated food

  4. Direct contact with an infected person
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The diseases which are more infectious called as a contagious disease. It can be transmitted through direct contact with infected person. It is also called as a communicable disease. 
Mosquitoes and other biting insects do spread diseases but not by mere contact. They need to insert their proboscis into the infected person to pick up and transmit the disease.
Contaminated food can cause the spread of disease but not by contagion. The food has to be ingested to cause the disease.
Thus, the correct answer is option D.

Multiple choice common health problem international health bodies health organisation biology

Which of the following is a transmissible disease? 

  1. Scurvy

  2. Food poisoning

  3. Diabetes

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

Food poisoning is caused either by one of a number of viruses or the bacteria Salmonella typhimurium or S.enteritidis. It is spread by contact with an infected person or via food which has been handled by an infected person. The bacterial form may also come from animals, e.g. chickens, which carry the bacteria. Whereas scurvy is caused due to deficiency of vitamin C, diabetes is a metabolic disorder caused either by insufficient production of insulin and cancer occurs when the normal control of cell division in a tissue fails. Thus, the correct answer is option B.