From: How do biting disease vectors behaviourally respond to host availability?
 | Definition | Plasmodium falciparum | Trypanosoma cruzi | Borrelia burgdorferi |
---|---|---|---|---|
b i | Transmission coefficient (vectors→hosts) = bite rate x transmission probability | 0.1 = 1/3 × 0.3 (humans) [42]; 0 (non-humans) | 2 × 10-5 = ¼ × 8 × 10-5 (humans) [43, 44]; 2.5 × 10-4 = ¼ × 0.001 (non-humans) [45] | \( 0.003=\frac{1}{365}\kern0.5em \times \kern0.5em 1.0\ \left(\mathrm{humans}\ \mathrm{and}\ \mathrm{n}\mathrm{o}\mathrm{n}\hbox{-} \mathrm{humans}\right) \) [46] |
b Vi | Transmission coefficient (hosts→vectors) = bite rate x transmission probability | \( 0.007=\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$3$}\right.\kern0.5em \times \kern0.5em 0.02\kern0.5em \left(\mathrm{humans}\right) \) [47]; \( 0\kern0.5em \left(\mathrm{n}\mathrm{o}\mathrm{n}{\textstyle \hbox{-}}\mathrm{humans}\right) \) | 0.015 = ½ × 0.03 (humans); 0.25 = ½ × 0.49 (non-humans) [48] | \( 0\ \left(\mathrm{humans}\right); \) \( 0.003\kern0.5em =\kern0.5em \frac{1}{365}\kern0.5em \times \kern0.5em 1.0\ \left(\mathrm{n}\mathrm{o}\mathrm{n}\hbox{-} \mathrm{humans}\right) \) [46] |
γ | Recovery rate (no immunity) | 0 (humans and non-humans) | 0 (humans and non-humans) | 1/28 (humans)a; 0 (non-humans) [31] |
ε | Clearance rate of symptomatic infection | 1/200 (humans) [49]; 0 (non-humans) | 0 (humans and non-humans) | 0 (humans and non-humans) |
κ | Clearance rate of asymptomatic infection | 1/200 (humans) [49]; 0 (non-humans) | 0 (humans and non-humans) | 0 (humans and non-humans) |
Ï€ | Asymptomatic primary infection rate | 0Â (humans and non-humans) | 0 (humans); 1/28 (non-humans) [31] | |
θ | Asymptomatic secondary infection rate | 0.5 (assumed for humans); 0 (non-humans) | 0 (humans and non-humans) | 0 (humans and non-humans) |
Ï„ | Full susceptibility reversion rate | 1/1000 (humans)Â [52]; 0 (non-humans) | 0Â (humans and non-humans) | 0Â (humans and non-humans) |
μ | Birth (or maturation) and death rate of vectors (i.e. stable population) | 1/10 [53] | 1/365 [54] | 1/365 [55] |
σ | Adjustment factor for asymptomatic transmissibility to vector | 0.25 (humans) [56]; 0 (non-humans) | ≈0 humans [30]; ≈1 non-humans [57]b | 0 (humans); ≈1 (non-humans) |
ζ | Rate of parasite development within vector | 1/10 [58] | 1/10 [59] | 1/365 [60]c |