Medical Microbiology — MCQs Biology

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1. Medical microbiology deals with the study of:
(A) Microbes in soil
(B) Industrial microorganisms
(C) Disease-causing microorganisms
(D) Beneficial microbes

2. Which microorganism causes tuberculosis?
(A) Salmonella typhi
(B) Mycobacterium tuberculosis
(C) Vibrio cholerae
(D) Streptococcus pneumoniae

3. Which bacteria causes cholera?
(A) Shigella dysenteriae
(B) Escherichia coli
(C) Vibrio cholerae
(D) Staphylococcus aureus

4. The causative agent of typhoid fever is:
(A) Vibrio cholerae
(B) Salmonella typhi
(C) Clostridium tetani
(D) Bacillus anthracis

5. Which disease is caused by a virus?
(A) Measles
(B) Malaria
(C) Tuberculosis
(D) Cholera

6. The bacterial shape of Streptococcus is:
(A) Spherical in chains
(B) Spiral
(C) Comma-shaped
(D) Rod-shaped

7. Which microorganism causes malaria?
(A) Trypanosoma
(B) Plasmodium
(C) Entamoeba
(D) Giardia

8. Which disease is caused by Clostridium tetani?
(A) Tetanus
(B) Gas gangrene
(C) Botulism
(D) Diphtheria

9. Which bacterium produces diphtheria toxin?
(A) Bacillus anthracis
(B) Mycobacterium leprae
(C) Corynebacterium diphtheriae
(D) Neisseria gonorrhoeae

10. AIDS is caused by:
(A) Retrovirus
(B) Bacterium
(C) Fungus
(D) DNA virus

11. Which microorganism causes leprosy?
(A) Mycobacterium tuberculosis
(B) Treponema pallidum
(C) Mycobacterium leprae
(D) Neisseria meningitidis

12. Which disease is transmitted by female Anopheles mosquito?
(A) Dengue
(B) Yellow fever
(C) Filariasis
(D) Malaria

13. The causative agent of syphilis is:
(A) Neisseria gonorrhoeae
(B) Haemophilus influenzae
(C) Chlamydia trachomatis
(D) Treponema pallidum

14. Which bacterium causes pneumonia?
(A) Streptococcus pneumoniae
(B) Vibrio cholerae
(C) Salmonella typhi
(D) Shigella dysenteriae

15. Which organism causes amoebic dysentery?
(A) Giardia lamblia
(B) Balantidium coli
(C) Entamoeba histolytica
(D) Plasmodium vivax

16. Which virus causes hepatitis B?
(A) RNA virus
(B) Retrovirus
(C) DNA virus
(D) Bacteriophage

17. Which microorganism causes gonorrhea?
(A) Treponema pallidum
(B) Chlamydia trachomatis
(C) Neisseria gonorrhoeae
(D) Haemophilus ducreyi

18. The causative agent of rabies is:
(A) Bacterium
(B) Protozoa
(C) Virus
(D) Fungus

19. Which bacterium causes anthrax?
(A) Corynebacterium diphtheriae
(B) Bacillus subtilis
(C) Clostridium botulinum
(D) Bacillus anthracis

20. Which disease is caused by fungus?
(A) Typhoid
(B) Ringworm
(C) Polio
(D) Cholera

21. Which organism causes whooping cough?
(A) Mycoplasma pneumoniae
(B) Streptococcus pyogenes
(C) Haemophilus influenzae
(D) Bordetella pertussis

22. Which bacteria lack a cell wall?
(A) Mycobacterium
(B) Mycoplasma
(C) Streptococcus
(D) Staphylococcus

23. Which microorganism causes polio?
(A) Virus
(B) Bacterium
(C) Fungus
(D) Protozoa

24. The causative agent of plague is:
(A) Yersinia pestis
(B) Salmonella typhi
(C) Vibrio cholerae
(D) Bacillus anthracis

25. Which disease spreads through contaminated water?
(A) Tuberculosis
(B) Cholera
(C) Influenza
(D) Rabies

26. Which virus causes influenza?
(A) Orthomyxovirus
(B) Rhinovirus
(C) Adenovirus
(D) Retrovirus

27. Which microorganism causes fungal infection of skin?
(A) Candida
(B) Plasmodium
(C) Entamoeba
(D) Trypanosoma

28. Which disease is known as sleeping sickness?
(A) Malaria
(B) Filariasis
(C) Leishmaniasis
(D) Trypanosomiasis

29. Which bacterium causes food poisoning?
(A) Staphylococcus aureus
(B) Lactobacillus
(C) Rhizobium
(D) Nitrosomonas

30. Which microorganism causes meningitis?
(A) Escherichia coli
(B) Vibrio cholerae
(C) Salmonella typhi
(D) Neisseria meningitidis

31. Which disease is caused by Chlamydia trachomatis?
(A) Diphtheria
(B) Tuberculosis
(C) Leprosy
(D) Trachoma

32. Which parasite causes kala-azar?
(A) Trypanosoma
(B) Plasmodium
(C) Entamoeba
(D) Leishmania donovani

33. Which disease affects peripheral nerves?
(A) Tuberculosis
(B) Cholera
(C) Typhoid
(D) Leprosy

34. Which virus causes chickenpox?
(A) Varicella-zoster virus
(B) Epstein–Barr virus
(C) Influenza virus
(D) Poliovirus

35. Which bacterium is acid-fast?
(A) Mycobacterium tuberculosis
(B) Salmonella typhi
(C) Escherichia coli
(D) Vibrio cholerae

36. Which disease is transmitted by dog bite?
(A) Tetanus
(B) Rabies
(C) Plague
(D) Anthrax

37. Which organism causes botulism?
(A) Clostridium botulinum
(B) Clostridium tetani
(C) Bacillus anthracis
(D) Corynebacterium diphtheriae

38. Which disease is caused by Protozoa?
(A) Polio
(B) Cholera
(C) Malaria
(D) Influenza

39. Which microorganism causes candidiasis?
(A) Fungus
(B) Virus
(C) Bacterium
(D) Protozoa

40. Which test is used to diagnose tuberculosis?
(A) Widal test
(B) VDRL
(C) ELISA
(D) Mantoux test

41. Which disease is sexually transmitted?
(A) Typhoid
(B) Cholera
(C) Tuberculosis
(D) Syphilis

42. Which organism causes dysentery?
(A) Giardia lamblia
(B) Plasmodium vivax
(C) Entamoeba histolytica
(D) Trypanosoma gambiense

43. Which disease is caused by HIV?
(A) Hepatitis
(B) Influenza
(C) AIDS
(D) Polio

44. Which bacteria are gram-positive?
(A) Escherichia coli
(B) Vibrio cholerae
(C) Staphylococcus aureus
(D) Neisseria gonorrhoeae

45. Which virus affects liver cells?
(A) Influenza virus
(B) Measles virus
(C) Polio virus
(D) Hepatitis virus

46. Which disease is caused by Treponema pallidum?
(A) Gonorrhea
(B) Syphilis
(C) Chancroid
(D) AIDS

47. Which microorganism causes dengue fever?
(A) Virus
(B) Protozoa
(C) Fungus
(D) Bacterium

48. Which disease is transmitted by Aedes mosquito?
(A) Malaria
(B) Kala-azar
(C) Filariasis
(D) Dengue

49. Which pathogen causes gas gangrene?
(A) Streptococcus pneumoniae
(B) Bacillus anthracis
(C) Clostridium perfringens
(D) Salmonella typhi

50. Which microorganism causes common cold?
(A) Rhinovirus
(B) Adenovirus
(C) Coronavirus
(D) Influenza virus