Stochastic Periodic Solution of a Susceptible-Infective Epidemic Model in a Polluted Environment under Environmental Fluctuation

Table 1

Biological meanings of the parameters in model (1).

Parameters	Biological meanings	Unit
	The intrinsic growth rate in absence of the toxicant
	Carrying capacity of the population in absence of the toxicant	Person
	Probability of infection	-
	The population natural death rate
	The death rate caused by disease
	The dose-response rate due to uptake of pollution for the susceptible
	The dose-response rate due to uptake of pollution for the infected
	The organisms net uptake rate of pollution from environment
	The egestion rate of pollution in the organism (metabolism)
	The depuration rate of pollution in the organism
	The environmental pollution loss rate due to natural degradation
	The exogenous rate of pollutant input into the environment