31. The most frequently encountered clostridial species in gas gangrene is______________?
A. Clostridium botulinum
B. Clostridium welchii
C. Clostridium tetani
D. Clostridium difficile
✅ The correct answer is option Clostridium welchii.
Microbiology MCQs
32. Killer and Helper cells are part of_______________?
A. B cells
B. T cells
C. Monocytes
D. Macrophage
✅ The correct answer is option T cells.
33. A type of immediately occuring reaction in which antigens combine with antibodies already attached to the surface of mast cells and basophils is called_____________?
A. Type I hypersensitivity
B. Type II hypersensitivity
C. Type III hypersensitivity
D. Type IV hypersensitivity
✅ The correct answer is option Type I hypersensitivity.
34. Actinomycosis is a_________________?
A. Aerobic bacterial disease
B. Anaerobic bacterial disease
C. Aerobic fungal disease
D. Anaerobic fungal disease
✅ The correct answer is option Anaerobic bacterial disease.
35. Virus is cultured in_______________?
A. Saubourd’s agar
B. Rogosa medium
C. Nonembryonated egg
D. Embryonated egg
✅ The correct answer is option Embryonated egg.
36. Which component of the cell wall is responsible________________?
A. Region I
B. Region II
C. Region III
D. Boivin antigen
✅ The correct answer is option Region III.
37. Staphylococcal food poisoning includes the following features_______________?
A. Incubation period of 24 hours
B. Requires immediate antibiotics
C. Common with dairy products
D. Heat labile enterotoxin
✅ The correct answer is option Common with dairy products.
38. Enterically transmitted NANB hepatitis B_____________?
A. Hepatitis C
B. Hepatitis D
C. Hepatitis E
D. Hepatitis F
✅ The correct answer is option Hepatitis E.
39. The most common pathogens responsible for nosocomial pneumonias in the ICU are______________?
A. Gram positive organisms
B. Gram negative organisms
C. Mycoplasma
D. Virus infections
✅ The correct answer is option Gram negative organisms.
40. In transmission of malaria, mosquito bite transfers_______________?
A. Sporozoite
B. Merozoite
C. Hypnozoite
D. Gametocyte
✅ The correct answer is option Sporozoite.