Equation (1) describes the dynamics of susceptible in the community of size p . The birth and death rate of the susceptible individuals is represented by n , np is the rate of recruitment into susceptible class α is the rate of exposure to contaminated food and water, αBS/(K+B) is the probability of susceptible catching cholera.
S is the susceptible and B is the concentration of toxigenic Vibrio Cholerae bacteria in food and water.