(a(i))[1]
Name the bacterium responsible for cholera.
(a(ii))[2]
Describe how cholera is passed from an infected person to a person who is not infected.
(b)[2]
Suggest how choleragen interacts with gangliosides on intestinal epithelial cells.
(c)[1]
Name the process shown in Fig. 6.1 by which choleragen enters the intestinal epithelial cell.
(d)[2]
Suggest and explain the likely effects on the intestinal epithelial cells of chloride ions being lost through the channel proteins.
(e)[3]
Health authorities advise that antibiotics, such as tetracycline, should be used only to treat people with severe cases of cholera. Explain why antibiotics should not be given to people with mild cholera or used to protect people from cholera.