Bacterial spores are destroyed by_______________?
(A) Boiling at 100°C
(B) Disinfection by hypochlorite solution
(C) Autoclave
(D) Pasteurisation
Which of the following is not a feature of anaphylaxis ?
(A) Delayed reaction
(B) Immediate reaction
(C) passive transfer by serum
(D) None of the above
compared with autoclave, use of a dry heat over for sterilization has the following disadvantages______________?
(A) Time-consuming
(B) Less effective
(C) Causes instruments to rust
(D) Causes sharp instruments to dull
Sterilisation is______________?
(A) Pathogens killed but spores are not affected
(B) Only pathogenic micro-organisms killed
(C) Non-pathogenic killed
(D) All pathogenic and non-pathogenic microorganisms killed
About Bacteroids True are all Except_______________?
(A) Susceptible to many antibiotics
(B) Present mainly in mixed infections
(C) Most common species is B fragilis
(D) Bile resistant anerobes
Which is not true about vibrio cholera_________________?
(A) It is non-halophilic
(B) Grows on simple media
(C) Man is the only natural host
(D) Cannot survive in extracellular environment
Pseudomonas aeruginosa_________________?
(A) Produces heat stable enterotoxin
(B) Causes Shangai fever
(C) Cannot be destroyed at 55 degree at 1 hr.
(D) Does not produce any pigment
Which of the following is true about tetanus acquired through traumatic wound ?
(A) Clostridium tetani travels via the nerves to the anterior horn dells in spinal cord
(B) The tetanospasmin component of the exotoxin act on the post-synaptic neurones and prevents impulse transmission
(C) The patient should be given tetanus toxoid intravenously
(D) Causes positive Nagler reaction
Actinomycosis is a_________________?
(A) Aerobic bacterial disease
(B) Anaerobic bacterial disease
(C) Aerobic fungal disease
(D) Anaerobic fungal disease