Mosquito army to be released in Zika fight in Brazil, Colombia

Updated 26 October 2016
Follow

Mosquito army to be released in Zika fight in Brazil, Colombia

LONDON: Scientists are planning to release an army of millions of modified mosquitoes in areas of Brazil and Colombia, reports the BBC.
They say the unusual approach is an attempt to provide “revolutionary protection” against mosquito-borne diseases such as Zika and chikungunya.
Health authorities in Colombia and Brazil will launch campaigns using a naturally occurring bacteria known as Wolbachia to fight the spread of dengue and Zika viruses among people.
Small-scale trials of the technique, which involves infecting mosquitoes with Wolbachia to prevent them from spreading the viruses, have shown a significant reduction in their ability to transmit Zika and dengue, prompting donors to back scale-up plans.
“The use of Wolbachia is a potential ground-breaking sustainable solution to reduce the impact of these outbreaks around the globe and particularly on the world’s poorest people,” said Britain’s international development secretary Priti Patel as the larger project was announced in London.
The control campaigns, scheduled to begin early next year in Colombia’s Antioquia and Brazil’s Rio de Janeiro, will be funded with $18 million from the British and United States governments, the Wellcome Trust global health charity and the Bill & Melinda Gates Foundation.
Zika has been linked to the birth defect microcephaly, characterised by an abnormally small head, that has been sweeping through South and Central America and the Caribbean and making its way north to the United States.
In February, the World Health Organization declared Zika a global health emergency. The connection between Zika and microcephaly came to light last year in Brazil.
Brazil has now confirmed more than 1,800 cases of babies with microcephaly that it considers are linked to Zika infections in the mothers.
The Wolbachia bacteria is occurs naturally in many insect species worldwide, and research has shown that it can significantly reduce the capacity of mosquitoes to transmit viruses to humans. But it doesn’t occur naturally in Aedes aegypti, the mosquito species largely responsible for transmitting a range of diseases including Zika, dengue, chikungunya and yellow fever.
Over the past decade, international researchers working with the Australian-led non-profit Eliminate Dengue Program (EDP) have found a way to transfer Wolbachia into Aedes aegypti mosquitoes and get them to pass it on to their offspring.
When mosquitoes with Wolbachia are released into an area, they breed with local mosquitoes and pass the bacteria on to future generations. Within a few months, the majority of mosquitoes carry Wolbachia and the effect is then self-sustaining.


Chinese villagers struggle for heat as gas subsidies fade

Updated 5 sec ago
Follow

Chinese villagers struggle for heat as gas subsidies fade

XUSHUI: Almost a decade after China began curbing coal burning to stop thick winter smog, villagers in northern Hebei province are struggling to afford their heating bills with most gas subsidies now phased out.
In 2017, Beijing mandated that dozens of northern areas wind down the use of coal-fired stoves in favor of electric and natural gas-powered systems.
China’s central government allocated funds to refit stoves, but subsidies faded after three years and additional aid has drastically declined, local media reported this week.
In Xushui, a district in Hebei roughly 100 kilometers (62 miles) outside Beijing, villagers told AFP they avoided turning on the heating because it drained their incomes.
“Regular folks can’t afford it... Spending 1,000 yuan ($143) per month on heat — no one can stand that,” a resident in his 60s told AFP at a farmers’ market.
“Everyone likes that (the air) is clean. There’s not one person that doesn’t like it,” he said, asking not to be named for fear of “trouble.”
“But... the cost of clean (air) is high,” he added.
On the clear, sunny day AFP visited, the warmest temperature was just under six degrees Celsius, with lows of minus seven.
Restaurant worker Yin Chunlan said that her elderly in-laws need to pay up to 7,000 yuan per year to heat their six-room village home.
Yin, 48, lives in an apartment in town and says her annual bill is a third of that.
“But it’s not the same in the village,” she told AFP.
“They have to set their heating much higher, and the temperature still isn’t as warm, so it wastes gas and wastes money.”
Yin’s in-laws often pile on extra blankets to stay warm.
“When I see it, it’s quite pitiful,” said Yin, wiping away a tear. “Nothing can be done.”
In one village, a woman in her 70s wore a green padded jacket underneath an apron as she crossed her outdoor courtyard.
Heating in her home is not turned on during the daytime, she said, showing AFP the system’s switchboard mounted above her stove displaying “off.”
The woman, who did not give her name, said the dial could reach 60C. When asked if the temperature inside could feel as warm, she laughed.

- Articles taken down -

Reports that villagers in Hebei were layering up under quilts to avoid costly heating peppered Chinese social media in the first week of the new year.
An article by Farmers’ Daily reshared in state media CCTV’s opinion section said in rural Hebei natural gas costs up to 3.4 yuan per cubic meter compared to 2.6 yuan in rural areas of Beijing.
Villagers told AFP they felt the huge price gap was unfair.
But the original article was quickly taken down, with republications, including the CCTV article, inaccessible days later.
China’s Ministry of Finance said in 2021 a total of 13.2 billion yuan in funds had been distributed for clean heating across Hebei.
But subsidies to support the installation of new systems and for gas bills, which had lasted three years, would not be renewed, it said in a letter.
The move came around the same time that international gas prices were driven up by Russia’s war in Ukraine. Last year, Chinese authorities reported national gas consumption growth had slowed.
The ministry, responding to a local proposal to increase financial support for provincial pollution control, said special funds would be arranged for additional subsidies in rural areas, but gave no details of the rollout.
A local Xushui government platform said in 2017 that some households would be eligible to receive 300 yuan in gas subsidies.
For villager Zhang Yanjun, that amount hardly made a dent in his bill of several thousand yuan per season.
The 55-year-old laborer said he had already spent more than 5,000 yuan on heating his home since October.
“If you give 300 or 200 yuan or something, it’s the same as if you gave no subsidies at all,” he said.