CLIMATE CHANGE/VARIABILITY

Climate has a significant role in mosquito distribution due to emerging favourable conditions especially rising temperatures. Globally, climate change projections indicate an increase in mean temperatures ranging between 1.8ยฐC and 4ยฐC by the end of the 21st century Climate change is likely to affect human health from impacting food insecurity and malnutrition to increasing in risk areas for vector-borne diseases.

How Climate influence Vector-borne Diseases

Climatic change creates new ecological niches for vectors hence altering temporal and spatial distribution of vector-borne disease. Climate change has been implicated as a contributing factor in dengue globally and the first outbreak of Chikungunya virus in temperate climate. Studies indicate that climate change and variability influence dynamics and potential spatio-temporal distribution of dengue vectors and hence potential of disease endemicity.

Climate sensitive vector-borne diseases

Humans have known that climatic conditions affect epidemic diseases from long before the role of infectious agents was discovered, late in the nineteenth century.

Vector-borne diseases sensitive to changes in climatic conditions include Dengue, Rift Valley Fever (RVF), Chikungunya, Onchocerciasis, Malaria, Zika, Yellow Fever, Filariasis, Leishmaniasis, Japanese Encephalitis etc.