Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
- armchairlawyer
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Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
Mosquitoes that are extremely resistant to insecticides have been discovered in Cambodia and Vietnam, raising concerns about the implications for controlling infectious diseases.
Aedes aegypti mosquitoes are major carriers of yellow fever, dengue fever and the Zika virus. The insects are found widely in tropical and subtropical regions of the world and their population numbers are largely controlled using insecticides.
Many of these belong to a class of chemicals called pyrethroids, which target the insects’ nervous systems, causing paralysis and death.
Pyrethroid resistance is a widely acknowledged issue when trying to control mosquito populations, but it is unclear how big a problem it actually is.
Shinji Kasai at the National Institute of Infectious Diseases in Tokyo and his colleagues sampled 23 populations of mosquitoes from Ghana, Taiwan, Vietnam and Indonesia.
The team sprayed mosquitoes in each population with a large dose of permethrin, a commonly used pyrethroid insecticide, that should in theory kill 99 per cent of the insects.....
Full article:
https://www.newscientist.com/article/23 ... -cambodia/
Aedes aegypti mosquitoes are major carriers of yellow fever, dengue fever and the Zika virus. The insects are found widely in tropical and subtropical regions of the world and their population numbers are largely controlled using insecticides.
Many of these belong to a class of chemicals called pyrethroids, which target the insects’ nervous systems, causing paralysis and death.
Pyrethroid resistance is a widely acknowledged issue when trying to control mosquito populations, but it is unclear how big a problem it actually is.
Shinji Kasai at the National Institute of Infectious Diseases in Tokyo and his colleagues sampled 23 populations of mosquitoes from Ghana, Taiwan, Vietnam and Indonesia.
The team sprayed mosquitoes in each population with a large dose of permethrin, a commonly used pyrethroid insecticide, that should in theory kill 99 per cent of the insects.....
Full article:
https://www.newscientist.com/article/23 ... -cambodia/
- John Bingham
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Re: Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
Has anyone on here ever contracted Malaria in Cambodia? Many friends have gotten Dengue and even Chikungunya (sp) but only one I remember got Malaria, and he hadn't been in the provinces for over a year. I'm not denying it's a big problem, just interested.
I've never had any of these myself.
I've never had any of these myself.
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- CEOCambodiaNews
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Re: Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
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- Jerry Atrick
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Re: Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
I had malaria but contracted it near the Thai border in a forested area, nasty illnessJohn Bingham wrote: ↑Tue Dec 27, 2022 6:08 pm Has anyone on here ever contracted Malaria in Cambodia? Many friends have gotten Dengue and even Chikungunya (sp) but only one I remember got Malaria, and he hadn't been in the provinces for over a year. I'm not denying it's a big problem, just interested.
I've never had any of these myself.
Have suspected dengue a few times but only ever had it confirmed once
- Freightdog
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Re: Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
I’ve been curious about this, too, as I’ve not heard any reports of Malaria. I worked a brief gig in West Africa at the beginning of the year, and every week someone in the team was being diagnosed and treated for Malaria.John Bingham wrote: ↑Tue Dec 27, 2022 6:08 pm Has anyone on here ever contracted Malaria in Cambodia? Many friends have gotten Dengue and even Chikungunya (sp) but only one I remember got Malaria, and he hadn't been in the provinces for over a year. I'm not denying it's a big problem, just interested.
I've never had any of these myself.
2 of the kids have had Dengue confirmed, here. Working in SE Asia before, companies would be concerned about Malaria, but I only ever heard of Chikungunya and later, Dengue cases among colleagues.
- Jerry Atrick
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Re: Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
Malaria is virtually non existant in any city or large town in Cambodia. Most cases are in more forested rural areas with a particularly nasty drug resistant strain on the western and North western Thai bordersFreightdog wrote: ↑Wed Dec 28, 2022 2:20 amI’ve been curious about this, too, as I’ve not heard any reports of Malaria. I worked a brief gig in West Africa at the beginning of the year, and every week someone in the team was being diagnosed and treated for Malaria.John Bingham wrote: ↑Tue Dec 27, 2022 6:08 pm Has anyone on here ever contracted Malaria in Cambodia? Many friends have gotten Dengue and even Chikungunya (sp) but only one I remember got Malaria, and he hadn't been in the provinces for over a year. I'm not denying it's a big problem, just interested.
I've never had any of these myself.
2 of the kids have had Dengue confirmed, here. Working in SE Asia before, companies would be concerned about Malaria, but I only ever heard of Chikungunya and later, Dengue cases among colleagues.
Re: Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
I have gotta say I have noticed when I spray the bedrooms at night because we get a lot of mossies living next to river i guess, when I go back into the room I can see the same mosquitos in the same spot it seems the spray has little or no effect on them . Even when I spray them direct hit they fly off . I remember years ago they would drop to the floor on the spot, I've tried three or four typical supermarket brands. Having had both Malaria and Dengue its not something I take lightly for the kid and lady living here with me and the old burning coils do zero just stink the place up.
- CEOCambodiaNews
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Re: Many mosquitoes are now insecticide-resistant in Vietnam and Cambodia
Kampong Speu at high risk of malaria
Chea Sokny | Publication date 28 December 2022 | 21:29 ICT
The people of Kampong Speu province are at increased risk of contracting malaria, say provincial authorities. They are not following the recommendations of medical professionals, using their prescribed medication irregularly or stopping taking it entirely.
Long Bonareth, deputy governor of Kampong Speu province, said that thanks to the cooperation of health officials, local authorities and volunteers, malaria had almost been eradicated from the province in the past, but these efforts were now likely to be undone by the irresponsible actions of some members of the community.
“We are unlikely to completely eradicate malaria cases because some people have given up treatment. Some of the people who have had the disease relapse, because they do not follow the instructions of their doctor,” she added.
“Many people live and work in the forest, or collect non-timber forest products there, and the life cycle of mosquitoes revives whenever the rainy season arrives,” she continued.
She said many resources had been used to try to solve the problem of malaria, and it would be a shame to see the good work done by health officials, volunteers and local authorities be undone.
Hok Kry, director of the Kampong Speu provincial Health Department, said malaria was still a concern for the province as was unlikely to be eradicated. He agreed with Bonareth’s assessment, saying that many of the people who entered the forest were failing to follow doctor’s instructions.
“Many of the residents of the most remote villages still have the habit of going into the forest to find non-timber forest products to sell. They stay in the forest for a long time, but do not follow the instructions of the village’s volunteer doctors. They often sleep without a mosquito net or fail to take the anti-malarial medicine they are given. This makes them more vulnerable to malaria,” he added.
He said that in some cases, they did not seek treatment after becoming infected, which could lead to the disease recurring and even endanger their lives.
“In addition, there is a new strain appearing near the border with Pursat province. Known as malariae, it is not possible to diagnose with rapid tests. This makes preventative measures even more important, as we cannot begin to treat it until we can diagnose it,” he added.
According to the Kampong Speu Health Department, in 2022, there were 808 cases of malaria in the province. Four were reported as malariae, the first instances of the strain in the province. The six health centres with the highest number of malaria cases were Oral, Trapeang Cho, Chambok, Tang Samrong, Omlaing and Monorongroeung.
https://www.phnompenhpost.com/national/ ... sk-malaria
Chea Sokny | Publication date 28 December 2022 | 21:29 ICT
The people of Kampong Speu province are at increased risk of contracting malaria, say provincial authorities. They are not following the recommendations of medical professionals, using their prescribed medication irregularly or stopping taking it entirely.
Long Bonareth, deputy governor of Kampong Speu province, said that thanks to the cooperation of health officials, local authorities and volunteers, malaria had almost been eradicated from the province in the past, but these efforts were now likely to be undone by the irresponsible actions of some members of the community.
“We are unlikely to completely eradicate malaria cases because some people have given up treatment. Some of the people who have had the disease relapse, because they do not follow the instructions of their doctor,” she added.
“Many people live and work in the forest, or collect non-timber forest products there, and the life cycle of mosquitoes revives whenever the rainy season arrives,” she continued.
She said many resources had been used to try to solve the problem of malaria, and it would be a shame to see the good work done by health officials, volunteers and local authorities be undone.
Hok Kry, director of the Kampong Speu provincial Health Department, said malaria was still a concern for the province as was unlikely to be eradicated. He agreed with Bonareth’s assessment, saying that many of the people who entered the forest were failing to follow doctor’s instructions.
“Many of the residents of the most remote villages still have the habit of going into the forest to find non-timber forest products to sell. They stay in the forest for a long time, but do not follow the instructions of the village’s volunteer doctors. They often sleep without a mosquito net or fail to take the anti-malarial medicine they are given. This makes them more vulnerable to malaria,” he added.
He said that in some cases, they did not seek treatment after becoming infected, which could lead to the disease recurring and even endanger their lives.
“In addition, there is a new strain appearing near the border with Pursat province. Known as malariae, it is not possible to diagnose with rapid tests. This makes preventative measures even more important, as we cannot begin to treat it until we can diagnose it,” he added.
According to the Kampong Speu Health Department, in 2022, there were 808 cases of malaria in the province. Four were reported as malariae, the first instances of the strain in the province. The six health centres with the highest number of malaria cases were Oral, Trapeang Cho, Chambok, Tang Samrong, Omlaing and Monorongroeung.
https://www.phnompenhpost.com/national/ ... sk-malaria
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