Table 1. Parameter definitions and the values used in the simulations.

Parameter	Definition	Value
	Number of eggs laid per female tick	2000
	Fraction of eggs that produce viable active larvae	0.4
	Probability of female nymph-to-adult molting	0.5·exp(−0.09)
	Probability of larva-to-nymph molting	exp(−0.9)
	Mortality rate of unfed larvae	−log((1−0.0067)30)
	Mortality rate of fed larvae	−log((1−0.00208)30)
	Mortality rate of unfed nymphs	−log((1−0.0021)30)
	Mortality rate of fed nymphs	−log((1−0.0007)30)
	Mortality rate of unfed adults	−log((1−0.00095)30)
	Mortality rate of fed adults	−log((1−0.0006)30)
	Survival probability of host 1 (H1)	exp(−0.25)
	Number of ticks feeding on a H1 individual	27.8 (L), 5 (N), 0 (A)
	Number of ticks feeding on a H2 individual	239 (L), 20 (N), 30 (A)
	Number of questing days per month	30 (L, N, A)
	Number of days ticks remain attached on a host	3 (L), 5 (N), 10 (A)
	Recovery rate of H1	0.3·(30)
	Probability of vertical transmission	0.001* [0,0.02]
	Probability of larva-nymph trans-stadial transmission	0.22
	Probability of nymph-adult trans-stadial transmission	0.54
	Probability of H1-to-tick systemic transmission	0.9* [0,0.9] (L, N)
	Probability of tick-to-H1 systemic transmission	0.8 (L, N), 0 (A)
	Aggregation parameter	1.19 (L), 0.56 (N)
	Correlation coefficient (LL:larva-larva, NN: nymph-nymph, LN: larva-nymph)	1 (LL, NN), 0.2 (LN)
	Probability of cofeeding transmission on a recovered H1 (LL: from a larva to a larva, LN: from a larva to a nymph, etc)	0.24* [0,0.24] (all)
	Probability of cofeeding transmission on a susceptible or infected H1	0.72* [0,0.72] (all)

The superscript Z specifies age class (L, N, or A). All the rates are per month. Parameters with an asterisk (*) were varied in simulations (the ranges in brackets). Sources from which the values are taken are listed in the extended version of this table in Table S1.