Biology Reference
In-Depth Information
Figure 1.10, cont'd
interaction between vector lifespan and the length of the sporogonic cycle;
as temperature varies throughout the year, as does the length of the extrin-
sic incubation period during which the parasite matures to the sporozoite
stage within the gut of the mosquito (
Nikolaev, 1935
). For transmission to
occur, the anopheline population must survive long enough for sporogony
of the parasite to occur. A model that assesses the effects of temperature on
P. vivax
over time (
Gething et al., 2011b
) was used to generate a grid of
temperature suitability proportional to vectorial capacity, a measure of trans-
mission potential (
Garrett-Jones, 1964
;
Smith and McKenzie, 2004
). Daily
vector survival was calculated as a function of local temperature and vector
lifespan was assumed to be 1 month (
Kiszewski et al., 2004
), with excep-
tions being made for areas with longer living species (
Anopheles sergentii
and
