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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Cataract formation in the eyes
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Forming of blood clots in a vein or artery
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Inflammation of the lungs
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Blood poisoning
D
Correct answer
Explanation
Septicemia is the medical term for blood poisoning - a serious bloodstream infection caused by bacteria. It occurs when bacteria enter the bloodstream from an infection site and spread throughout the body. Cataracts involve the eye, blood clots are thrombosis, and lung inflammation is pneumonia.
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Human immunodeficiency virus (HIV)
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Chlamydia trachomatis
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Neiserria gonorrhoeae
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Treponema pallidum
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HCMV
C
Correct answer
Explanation
Gonococci develops resistance to antibiotics through plasma-mediated mechanisms.
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Neisseria gonorrhoeae and chlamydia trachomatis can both result in neonatal eye infections.
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Infection with the lymphogranuloma (LGV) strain of chlamydia is the most common cause of pelvic inflammatory disease (PID).
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Antibiotic resistance is more common after infection with Chlamydia trachomatis than after infection with Neisseria gonorrhoeae.
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Chlamydia trachomatis is a gram-negative diplococcus.
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In women, chlamydial infection usually affects clitoris and vagina.
A
Correct answer
Explanation
Both gonorrhea and chlamydia can cause neonatal eye infections.
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Typhoid
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Cholera
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Malaria
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Tuberculosis
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Anthrax
C
Correct answer
Explanation
Malaria is caused by protozoan.
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They are spread by microbes.
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They spread very quickly.
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They have mild symptoms and last for a long time.
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Both 1 and 2
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1, 2 and 3
D
Correct answer
Explanation
Infectious diseases are spread by microbes and spread very quickly in a community. This is the correct answer.
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Viruses
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Protozoa
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Worm
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Bacteria
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Fungi
C
Correct answer
Explanation
Elephantiasis is caused by worms and is a chronic disease.
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a, b and d
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b, c and d
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a and c
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Only b
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Only d
D
Correct answer
Explanation
Viruses are the disease-causing microbes that live and remain active inside the host cells.
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Communicable diseases are transferred from a patient to a healthy person.
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Communicable diseases are caused by pathogens.
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Communicable diseases spread through some agent.
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Communicable diseases can be caused by nutritional deficiency.
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Communicable diseases can be caused due to infection.
D
Correct answer
Explanation
This is incorrect. Non-communicable diseases are caused by nutritional deficiency. Communicable diseases can be due to degeneration of organs or malfunctioning of organs due to infection.
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AIDS
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Common cold
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Influenza
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Malaria
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Dengue
D
Correct answer
Explanation
This is caused by a protozoan.
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Brain
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Liver
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Lungs
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Kidneys
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All the lymph nodes
A
Correct answer
Explanation
The virus causing Japanese encephalitis or brain fever enters through a mosquito bite and it goes on to infect the brain.
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Only a
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Only b
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Both a and c
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Both b and c
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All a, b and c
E
Correct answer
Explanation
This is the correct answer as communicable diseases can be spread by air, contaminated drinking water, vectors such as mosquitoes and other animals, and sexual contact.
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Lyme disease
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Yaws
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Kawasaki disease
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Relapsing fever
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Syphilis
C
Correct answer
Explanation
Kawasaki disease is an acute febrile illness with inflammation of small and medium sized blood vessels throughout the body, in particular, the coronary arteries (blood vessels around the heart).
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Pregnancy
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Lymphoma
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Diabetes mellitus
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Broad-spectrum antibiotics
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Vegetarian diet
E
Correct answer
Explanation
There is no evidence that this leads to excess Candida infections.
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It only affects the elderly.
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It affects the peri-arteriolar connective tissues of the body.
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It is believed to be caused by antibody cross-reactivity.
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It shows no evidence of genetic susceptibility.
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The recurrence of rheumatic fever is relatively common in the absence of maintenance of low dose antibiotics.
A
Correct answer
Explanation
Rheumatic fever usually affects young children and adolescents.
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Erysipelas
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Tropical pyomyositis
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Impetigo
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Cellulitis
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Folliculitis
E
Correct answer
Explanation
Folliculitis is the name given to a group of skin conditions in which there are inflamed hair follicles. The result is a tender red spot, often with a surface pustule. Acne and its variants are also types of folliculitis.