The Influence of Climate Change on global distributions of Dengue and Chikungunya Vector Species

by Kaylee Anderson

The global distribution of human cases of dengue and other mosquito-transmitted disease presents a serious health problem, especially considering the diseases have spread significantly in recent years. Although there is considerable research on the global distribution of these diseases, there is a second concern: range expansion by vector species. In recent years, the two main mosquito vectors, Aedes aegypti and albopictus have spread to more regions, including lower and middle latitudes, introducing ‘forest diseases’ to humans. Ae. aegypti is thought to be responsible for most massive outbreaks of dengue, so its future geographical distribution is important to predict. Continue reading

Hayfever in the UK Extends to Autumn Months

by Kaylee Anderson

Hayfever is one of the most common allergic conditions, affecting as many as 10 million people in the United Kingdom. It is most well-known to be triggered by ragweeds in the United States and by grasses in the UK. Ragweeds were introduced to Europe in the 19th century, rapidly spreading by 1940.

It is believed that the threshold for clinical symptoms of hayfever is as low as 1-3 ragweed pollen grains/m3, which is significantly lower than other well-known pollen allergens, like grass and birch. Continue reading

Health Impacts of Flooding

by Kaylee Anderson

An effect of climate change is an increase in the occurrence of floods. Particularly, in Canada flooding is five times more frequent than the occurrence of the next most common natural disaster. In addition to the obvious risk of drowning, toxin and pathogen exposure, and stress increase during flooding. A past study by Nakamura, et al. (2012) revealed an association between acute cardiovascular disease and natural disasters, such as the Japanese tsunami in 2011. Vanasse et al. (2016) examines the effect of flooding on acute cardiovascular disease in Saint-Jean-sur-Richelieu. Continue reading