One of the most important variables in vectorial capacity is mosquito life span, because vectorial capacity is strongly influenced by vector longevity through an exponential, power and logarithmic relationship when considered epidemiologically.
These analyses, in conjunction with observations on vector longevity (26 ), vector competence (8, 25, 27 ), and prevalence of EEEV infection in Cs. melanura mosquitoes (ArboNET), suggest that this species could serve as an enzootic and epidemic/epizootic bridge vector of EEEV.
However, the models mostly focused on the effect of temperature on parasites development and vectors' longevity and should now evaluate the impact of climate warming on Anopheles density.
More research too on the ability of human schistosome eggs to hatch, miracidia to survive and infect snail vectors, longevity of snail hosts, and infectivity of cercariae released by snails in brackish water, and also the possibility of trematode parasites and their snail hosts adapting to brackish water in the long term is required.
Indeed, climate change could not only directly increase JE vector proliferation and longevity but could also indirectly increase disease because of changing patterns of agricultural practices such as irrigation (Technical Appendix, supplementary references 47,48).
Therefore, the capacity of transmission of the disease by the tsetse fly is influenced by different factors, such as the density of tsetse populations, the tsetse fly's longevity, the vector's susceptibility to infection, the tsetse fly's infestation rates, the availability of other sources of a blood meal, and the factors that determine the frequency and intensity of the host-fly's contacts.
Mosquitos' longevity, man-vector contact and mosquito density determine the transmission capacity of a vector population.
Longevity of vectors and the process of parasite development are sensitive to temperature.
Pathogen transmission and patterns of emerging disease may become further altered through spatial and temporal shifts in geographic range, patterns of reproduction, and longevity for vectors (Patz et al., 2000; Hoberg et al., 2008b).
Although malaria transmission is determined by both the longevity of vectors and the productivity of parasites (presence and density of salivary gland sporozoites), the latter is rarely studied (but see Sinden et al. 2007), and the potential interactions between density-dependent factors are largely ignored (but see Dawes et al. 2009a; Churcher et al. 2010).
Plasmodium infection has been shown to compromise the fitness of the mosquito vector, reducing its fecundity and longevity.
