More than 1,000 people in Bangladesh have died of dengue fever since the start of the year, official figures showed, in the country’s worst recorded outbreak of the mosquito-borne disease.

Dengue is a disease endemic to tropical areas that causes high fevers, headaches, nausea, vomiting, muscle pain and, in the most serious cases, bleeding that can lead to death.

The World Health Organization has warned that dengue — and other diseases caused by mosquito-borne viruses such as chikungunya, yellow fever and Zika — are spreading faster and further due to climate change.

Figures from the country’s Directorate General of Health Services published on Sunday night said 1,006 people had died, among more than 200,000 confirmed cases.

The agency’s former director Be-Nazir Ahmed told AFP Monday that the number of deaths so far this year was higher than every previous year combined since 2000.

“It’s a massive health event, both in Bangladesh and in the world,” he added.

Among the dead are 112 children aged 15 and under, including infants, according to the official data.

This year’s figures dwarf the previous highest total from 2022 when 281 deaths were recorded.

Scientists have attributed this year’s outbreak to irregular rainfall and hotter temperatures during the annual monsoon season that have created ideal breeding conditions for mosquitoes.

Bangladesh has recorded cases of dengue from the 1960s but documented its first outbreak of dengue haemorrhagic fever, a severe and sometimes fatal symptom of the disease, in 2000.

The virus that causes the disease is now endemic to Bangladesh, which has seen a trend of worsening outbreaks since the turn of the century.

Most cases are recorded during the July to September monsoon season, the months which bring the vast majority of the country’s annual rainfall, along with occasional floods and landslides.

But Bangladeshi hospitals have also begun to admit patients suffering from the disease during winter months in recent years.

Dengue wards in Dhaka’s major hospitals are currently filled with patients being treated beneath mosquito nets under the watchful and worried eyes of family members.

‘Canary in the coal mine’

World Health Organization chief Tedros Adhanom Ghebreyesus said in September that the outbreak was “putting huge pressure on the health system” in Bangladesh.

The agency’s alert and response director Abdi Mahamud said the same month that such outbreaks were a “canary in the coal mine of the climate crisis”.

He said that a combination of factors including climate change and this year’s El Nino warming weather pattern had contributed to severe dengue outbreaks in several areas including Bangladesh and South America.

Countries in sub-Saharan Africa such as Chad have also recently reported outbreaks, he added.

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