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

Multiple choice

Which among the following infections spreads through vaginal intercourse, oral-to-genital contact, and vertically from mother to her infant in utero?

  1. Herpes

  2. Micoplasma hominis

  3. Crypto

  4. Shigellosis

  5. Giardiasis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micoplasma hominis infection spreads through vaginal intercourse, oral-to-genital contact, and vertically from mother to her infant in utero or by the colonization by the bacteria as the baby descends through the birth canal or by nosocomial acquisition through transplanted tissues.

Multiple choice

Which of the following is a sexually transmitted infection in humans caused by bacterium Treponema pallidum and transmitted from mother to fetus during pregnancy or at birth?

  1. Gonnococcal infection

  2. Trichomoniasis

  3. Syphilis

  4. Chlamydia infection

  5. Herpes simplex
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Syphilis is a sexually transmitted infection caused by the spirochete bacterium Treponema pallidum subspecies pallidum. The primary route of transmission is through sexual contact; it may also be transmitted from mother to fetus during pregnancy or at birth, resulting in congenital syphilis.

Multiple choice

Which of the following is an acute inflammation of the protective membranes covering the brain and spinal cord?

  1. Rabies

  2. Meningitis

  3. Anthrax

  4. Epilepsy

  5. Migraine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Meningitis is an acute inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria or other microorganisms, and less commonly by certain drugs.

Multiple choice

Which of the following viral and viroidal disease(s) of citrus is/are caused by CPV? P. Psorosis Q. Blind pocket R. Cochexia S. Concave gum

  1. Only P

  2. Only Q

  3. R only

  4. Only S

  5. Q and S
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In citrus, psorosis disease is caused by Citrus Psorosis Virus (CPV), blind pocket disease is caused by Viroids and graft-transmissible pathogens (GTP), cochexia disease is caused by Citrus cachexia viroid (CCVr) and concave gum disease is caused by Viroids and graft-transmissible pathogens (GTP). Hence, psorosis disease is caused by CPV.

Multiple choice

Which of the following sets represents bacterial diseases only?

  1. Malaria, Pneumonia, Tetanus, Typhoid

  2. Clonorchiasis, Malaria, Meningitis, Pneumonia

  3. Meningitis, Pneumonia, Tetanus, Typhoid

  4. Ateliosis, Malaria, Meningitis, Typhoid

  5. Ateliosis, Clonorchiasis, Pneumonia, Tetanus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Meningitis, Pneumonia, Tetanus, Typhoid: All are bacterial diseases. Causative agent of meningitis is Neisseria meningitidus (Bacteria). Causative agent of pneumonia is Diplococcus pneumoniae (Bacteria). Causative agent of tetanus is Clostridium tetani (Bacteria). Causative agent of typhoid is Salmonella typhi (Bacteria).

Multiple choice

Which of the following sets represents communicable diseases?

  1. Osteoporosis, Hypertension, Cancer

  2. Hypertension, Cancer, Tuberculosis

  3. Tuberculosis, Measles, Osteoporosis

  4. Tuberculosis, Pertussis, Cancer

  5. Tuberculosis, Measles, Pertussis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Tuberculosis is a communicable disease that is caused by bacteria that attack the lungs or other parts of the body such as the kidney, spine or brain. TB spreads from person-to-person through the air. When a person with active TB coughs or sneezes TB bacteria get in the air. Anyone who has close and frequent contact with a person with active TB disease can breathe in the bacteria and become infected. Measles is a highly contagious respiratory illness caused by a virus. Measles is spread person-to-person when an infected person coughs, sneezes, or shares food or drinks. Pertussis (whooping cough) is a very contagious bacterial disease of the lungs and respiratory system. Pertussis spread by tiny wet drops produced when an infected person coughs, sneezes or talks.