Modelling and Optimal Control of Typhoid Fever Disease with Cost-Effective Strategies

Table 2

Parameter values for typhoid fever model.

Parameter symbol	Parameter description	Value	Source
	Salmonella ingestion rate	0.9	Assumed
	Concentration of Salmonella bacteria in foods and water	50000	[14]
	Human beings natural death rate	0.0247	Assumed
	Typhoid induced death rate	0.052	Estimated
	Treatment rate of infectious diseases	0.002	Estimated
	Discharge rate of Salmonella from carriers	0.9	Gosh et al., 2006
	Discharge rate of Salmonella from infective	0.8	Assumed
	Removal rate from recovered subclass to susceptible subclass	0.000904	Adetunde, 2008
	Screening rate of carriers	0.2	Assumed
	Removal of carriers by natural immunity	0.0003	Assumed
	Probability of susceptible joining carrier state	0.3	Assumed
	Natural/drug induced death rate of bacteria	0.001	Gosh et al., 2006
	Recruitment of human beings	100	Assumed