Quantifying the effects of environmental temperature on parasite development (Extrinsic Incubation Period)
The extrinsic incubation period is the reciprocal of the parasite development rate (PDR). A convenient representation of the PDR follows from the Briére equation (Briére et al . 1999)
PDRparasite (T) = c * T * (T – Tmin) * √ (Tmax – T) (1)
where Tmin and Tmax are the minimum and maximum temperatures that can sustain
parasite development and c is a constant, the scaling parameter. These parameters must
be estimated or fit against experimental data. This model was based on thermodynamic
principles and shown to capture accurately the form of the EIP inPlasmodium falciparum and Plasmodium vivax as described previously by others (Paaijmans et al . 2009, Cator et al.2013).