6. An acute diarrhoeal disease resembling cholera can be caused due to

A. Aeromonas hydrophila
B. Vibrio vulnificus
C. V. alginolyticus
D. All of these

7. The transport medium for Vibrio cholerae can be

A. Venkatraman-Ramakrishnan medium
B. Selenite F broth
C. Tetrathionate broth
D. Nutrient broth

8. Which of the following does not cause wound infection following exposure to seawater or infected shellfish?

A. Vibrio vulnificus
B. V. alginolyticus
C. V. cholerae
D. Aeromonas

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

A. Radioimmunoassay
B. Enzyme-linked immunosorbent assay
C. Morphological changes in Chinese hamster ovary cells
D. All of the above

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

A. phage
B. plasmid
C. chromosome
D. transposon