SPREAD OF MAJOR TROPICAL
VECTOR-BORNE DISEASES
"You take the blue pill and the story ends. You wake in your bed and you believe whatever you want to believe."
"You take the red pill and
you stay in Wonderland and I'll show you how deep the
rabbit-hole goes."
Vital Climate Graphics :
Potential Impacts
of Climate Change
Next: Potential dengue
transmission in case of temperature rise
38. The transmission of many infectious diseases is affected by
climatic factors. Infective agents and their vector organisms are
sensitive to factors such as temperature, surface water, humidity,
wind, soil moisture, and changes in and forest distribution. This
applies particularly to vector-borne diseases (VBD) like malaria. It
is therefore projected that climate change and altered weather patters
would affect the range (both altitude and latitude), intensity, and
seasonality of many vector-borne and other infectioius diseases. In
general, increased warmth and moisture would enhance transmission of
VBDs. However, it should be noted that any such climate-related
redistribution of disease may also entail, perhaps in conjunction with
other environmental stresses, some localized reductions in rates of
infection.
In tropical countries, VBDs are a major cause of illness and death.
For the major VBDs, estimates of numbers of people at risk and
infected, and of VBD sensitivity to climate are shown in the figure.
While the potential transmission of many of these diseases increase in
response to climate change, the capacity to control the diseases will
also change. New or improved vaccination can be expected; some vector
species can be constrained by use of pesticides. Nevertheless, there
are uncertainties and risks here, too: for example long term pesticide
use breeds resistant strains and kills many predators of pests.
Next: Potential dengue
transmission in case of temperature rise
Vital Climate Graphics :
Potential Impacts
of Climate Change
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