Mathematical Model of MDR-TB and XDR-TB with Isolation and Lost to Follow-Up

Table 1

Variables and parameters description of model (2).

Variable	Description
	Susceptible individuals
	Latently infected individuals with drug sensitive, MDR, and XDR strains
	Symptomatically infectious individuals with drug sensitive, MDR, and XDR strains
	Symptomatically infectious individuals who are lost to sight with drug sensitive, MDR, and XDR strains
	Isolated individuals
	Recovered individuals
Parameter	Description
	Recruitment rate
	Natural death rate
	TB reinfection rate
	Transmission probability
	Infectivity modification parameter
	Fraction of fast disease progression
	Fraction that failed treatment
	Disease progression rate
	Recovery rate
	Isolation rate
	Disease-induced death rate
	Lost to follow-up rate
	Return rate from lost to follow-up
	Disease-induced death rate in individuals who are lost to follow-up