Wednesday, 18 November 2015

Vibrio, Aeromonas and Plesiomonas

Vibrio, Aeromonas and Plesiomonas

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The halophilic bacteria is/are ____________.

a. V. vulnificus
b. V. alginolyticus
c. All of these
d. Vibrio parahaemolyticus

Which of the following toxin resembles cholera toxin?

a. Labile toxin of Escherichia coli
b. Stable toxin of E. coli
c. Tetanus toxin
d. Diphtheria toxin

Which of the following biotypes of Vibrio cholerae are prevalent in India?

a. None of these
b. EI Tor
c. Both (a) and (b)
d. Classical

Which of the following bacteria is associated with food poisoning due to consumption of sea fish?

a. V alginolyticus
b. Vibrio parahaemolyticus
c. All of these
d. V vulnificus

The transport medium for Vibrio cholerae can be ____________.

a. Nutrient broth
b. Selenite F broth
c. Venkatraman-Ramakrishnan medium
d. Tetrathionate broth

Which of the followings can be used to differentiate between classical and El Tor biotypes of Vibrio cholerae?

a. All of these
b. Agglutination of fowl RBCs
c. Sensitivity to Mukerjee's group IV phage
d. Sensitivity to polymyxin B

Which of the following does not cause wound infection following exposure to sea water or infected shellfish?

a. V. cholerae
b. V. alginolyticus
c. Aeromonas
d. Vibrio vulnificus

The test(s) used for the assay of cholera toxin is/are ____________.

a. Enzyme-linked immunosorbent assay
b. Radioimmunoassay
c. All of the above
d. Morphological changes in Chinese hamster ovary cells

Which of the following medium are used to differentiate the colonies of Vibrio cholerae and V parahaemolyticus?

a. All of the above
b. Alkaline bile salt
c. Thiosulphate-citrate-bile-sucrose
d. MacConkey

Which of the following conditions can be caused by Plesiomonas?

a. Cellulites
b. All of these
c. Gastroenteritis
d. Septicaemia

Acute diarrhoeal disease resembling cholera can be caused due to ____________.

a. V. alginolyticus
b. Aeromonas hydrophila
c. All of these
d. Vibrio vulnificus

The DNA coding for the production of cholera toxin in Vibrio cholerae is on the ____________.

a. phage          
b. chromosome           
c. transposon
d. plasmid
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