Mcq Subject: Microbiology
Toxic shock syndrome is due to the following virulence factor:
A. M protein
B. Pyrogenic exotoxin
C. Streptolysin 0
D. Carbohydrate cell wall
View DescriptionA type of immediately occurring 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
View DescriptionIn which of the following ways is CLED medium better than MacConkey agar?
A. It prevents proteus swarming
B. Inhibits growth of other commensals
C. It allows Staphylococcus and Candida to grow
D. It differentiates lactose fermenters from non-fermenters
View DescriptionA patient in an ICCU is on CVP line. His blood culture shows growth of Gram +ve cocci which are catalase positive and coagulase negative. The most likely etiological agent is:
A. Staph. aureus
B. Staph. epidermidis
C. Streptococcus pyogenes
D. Enterococcus faecalis
View DescriptionWhich of the following malignancy is not caused by Human Papilloma Virus (HPV) infection?
A. Carcinoma base of tongue
B. Cervical carcinoma
C. Tonsillar carcinoma
D. Nasopharyngeal carcinoma
View DescriptionAbout 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
View DescriptionAutoinfection can be caused by all the following helminths except:
A. Enterobius vermicularis
B. Hymenolepis nana
C. Taenia solium
D. Ascaris lumbricoides
View DescriptionNot true about vibrio cholera is
A. Increase water and sodium loss by debilitating diarrhoea
B. Toxic protein is cholera toxin
C. Activate adenylatecyclase
D. Gram positive rod
View DescriptionThe virus HIV is produced and propagated in:
A. Dendritic cells of the lymphnode germinal epithelium
B. Circulating T4 lymphocytes
C. B- lymphocytes
D. Epithelial cells of the sex organs
View DescriptionThe following is characteristic feature of staphylococcus food poisoning except:
A. Optimum temperature for toxin production is 370C
B. Intradietic toxin are responsible for intestinal symptoms
C. Toxin can be destroyed by boiling for 30 minutes
D. Incubation period is 1-6 hours
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