Biology ยท 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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Only 1 and 2
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Only 1 and 3
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Only 2, 3 and 5
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Only 1 and 4
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Only 3 and 4
D
Correct answer
Explanation
Yes, both are non infectious diseases.
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AIDS
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Tetanus
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Ring Worm
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Rheumatoid Arthritis
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Amoebic Dysentry
D
Correct answer
Explanation
Rheumatoid Arthritis is an autoimmune disease.
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Syphilis
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Genital herpes
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Hepatitis B
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Molluscum contagiosum
A
Correct answer
Explanation
Syphilis is a sexually transmitted disease caused by bacteria. The highly infectious disease may also be passed through blood transfusions or from mother to her developing embryo in the womb.
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Trichomoniasis
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Jock itch
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Vaginal candidiasis
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Scabies
D
Correct answer
Explanation
It is a very contagious skin disease being caused by a mite, which is visible under only magnifying glass or under a microscope.
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haemophilia B
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hepatitis B
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the Down's syndrome
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sleeping sickness
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None of these
A
Correct answer
Explanation
It is a blood clotting disorder caused by a mutation of the Factor IX gene, leading to a deficiency of Factor IX. It is the second most common form of haemophilia, rarer than haemophilia A. It is sometimes called Christmas disease
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kidneys
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liver
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heart
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brain
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none of these
D
Correct answer
Explanation
Meningitis is inflammation of the meninges. The meninges is the collective name for the three membranes that envelope the brain and spinal cord (central nervous system), called the dura mater, the arachnoid mater, and the pia mater. The meninges' main function, alongside the cerebrospinal fluid is to protect the central nervous system.
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Syphilis
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Gonorrhea
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Typhoid
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AIDS
C
Correct answer
Explanation
Syphilis, Gonorrhea, and AIDS (HIV) are sexually transmitted infections. Typhoid fever is caused by Salmonella typhi bacteria transmitted through contaminated food and water, not sexual contact.
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bacteria
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fungi
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virus
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worm
A
Correct answer
Explanation
Gonorrhea is caused by the bacterium Neisseria gonorrhoeae, which is a gram-negative diplococcus. It primarily infects the mucous membranes of the reproductive and urinary tracts. Unlike fungal, viral, or worm infections, gonorrhea responds to antibiotic treatment targeting bacterial cell structures.
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Diabetes
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Diarrhoea
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Brain fever
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Malaria
C
Correct answer
Explanation
Japanese encephalitis is a viral brain infection transmitted by mosquitoes, often colloquially called 'brain fever' due to the inflammation and swelling of brain tissue it causes. Diabetes is a metabolic disorder, diarrhoea is a gastrointestinal condition, and malaria is a blood infection affecting different systems entirely.
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Kala-azar
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Hepatitis
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SARS
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Amoebiasis
B
Correct answer
Explanation
Hepatitis specifically causes inflammation of the liver, whether from viral infection (Hepatitis A, B, C), alcohol, toxins, or autoimmune conditions. Kala-azar primarily affects the spleen and liver but is a parasitic disease called visceral leishmaniasis, SARS is a respiratory illness, and amoebiasis mainly infects the intestines.
A
Correct answer
Explanation
When microbes enter through the nose, they travel down the respiratory tract and primarily infect the lungs and respiratory system. The heart is vascular and not directly accessible this way, while the gut requires swallowing through the mouth, and the liver would require bloodstream circulation from the lungs.
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gastrointestinal disorder
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brain disorder
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lung disorder
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kidney disorder
A
Correct answer
Explanation
Diarrhoea is fundamentally a gastrointestinal disorder involving frequent loose or watery bowel movements, typically caused by infections, toxins, or malabsorption in the digestive tract. It does not involve the brain, lungs, or kidneys as primary affected organs.
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Bacteria
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Virus
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Protozoa
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Fungi
B
Correct answer
Explanation
Brain fever (Japanese encephalitis) is caused by a flavivirus transmitted by mosquitoes, not by bacteria, protozoa, or fungi. The virus directly infects and inflames brain tissue, causing the characteristic symptoms of encephalitis.
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bacteria
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fungi
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virus
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protozoa
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By accidents
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By animal bite
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By sexual contact
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By physical contacts
B
Correct answer
Explanation
Rabies virus is transmitted through the saliva of infected animals, typically entering the body through a bite wound. It does not spread through accidents, sexual contact, or casual physical touching.