Malaria and dengue the sting in climate change
Reuters News Service,
SYDNEY (Reuters) -
A new report titled "The Sting of Climate Change," said recent data suggested that since the 1970s climate change had contributed to 150,000 more deaths every year from disease, with over half of the deaths in
"Projections of the impact of climate change on malaria and dengue are truly eye-opening," said the Lowy Institute report released in
According to the World Health Organization, rising temperatures and higher rainfall caused by climate change will see the number of mosquitoes increasing in cooler areas where there is little resistance or knowledge of the diseases they carry.
The Lowy report said early modeling predicted malaria prevalence could be 1.8 to 4.8 times greater in 2050 than 1990. The share of the world's population living in malaria-endemic zones could also grow from 45 percent to 60 percent by the end of the century.
By 2085, an estimated 52 percent of the world's population, or about 5.2 billion people, will be living in areas at risk of dengue.
It also said diseases will spread once climate change forces people to flee their homes, such as low-lying islands or coastal land swamped by rising sea levels.
For example, in the Pacific nation of
"The number of environmental refugees as a whole may reach 50 million by 2010, with small, low-lying island populations at the greatest risk. Displaced people from lowland areas could well provide the human reservoir for the spread of malaria and dengue," said the report.
"Global climate change will intensify the already significant malaria and dengue problems in maritime
"Those countries with the fewest resources and poor public health infrastructure are likely to feel the impact of increasing disease the most acutely," said the report.
Up to half a billion new cases of malaria and as many as two million deaths, mostly children, are recorded each year. There are an estimated 50-100 million cases of dengue fever annually and approximately 25,000 deaths.
MAJOR HEALTH PROBLEM
Malaria is a major health problem for
Indonesia had an estimated 6 million to 15 million registered malaria cases in 2005 and it is estimated that almost half of its population of over 225 million people will eventually be at risk from malaria due to climate change, said the Lowy report.
Australia, free of malaria and dengue fever, is also at risk because it is a "fringe country" to the expanding endemic zone of mosquito-borne diseases to its north, said the report.
"Mosquitoes are very sensitive to changes in climate. Warmer conditions allow the mosquitoes and the malaria parasite itself to develop and grow more quickly, while wetter conditions let mosquitoes live longer and breed more prolifically," it said.
"The sting of climate change is an international public health crisis being felt on
Climate change also threatens to increase the spread of dengue fever. The South Pacific's scattered island nations of
Modeling showed that dengue fever could increase by 20 to 30 percent in