A Multiscale Model for the World’s First Parasitic Disease Targeted for Eradication: Guinea Worm Disease

Table 2

Number of possible positive roots of .

Cases					Number of sign changes	Number of possible real roots (endemic equilibrium)
1					0	0
2					1	1
3					2	0, 2
4					1	1
5					2	0, 2
6					1	1
7					2	0, 2
8					3	1, 3