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Mosquito Control Ideas
#11
PauHana:

A woman came to the meeting and while asking her question said she has been tested for Dengue!!
For heavens sake if you suspect you have it don't go where you can spread it to lots of people.


Thanks for the report about the meeting. The pest companies not spraying for mosquitos is kinda reminiscent of them not spraying for fire ants outside. Probably folks will start offering these services in the gray market, so to speak.

Not understanding the bit about the woman who was _tested_ for Dengue, though. I would assume if she had it she would be too sick to go to the meeting unless it was in the early days before she was symptomatic--in which case how would she know to get tested? Of course, people's reaction to being infected are subject to a bell shaped curve, even if the SD would be kinda small, so who knows?

Are you suggesting that people with dengue be quarantined? There seems to be a day or two when they may be infected but not symptomatic, so I guess they could go out and about, get bit by a mosquito and then you could get bit by that mosquito. This is how it spreads apparently. With symptoms most folks infected are in bed I would imagine, usually not exposed to more mosquitos.

In any case, you're not going to catch Dengue from a person directly, even if they are frightened enough to get tested without symptoms. (I thought even those _with_ symptoms are having trouble getting tested...?)

Please share your experiences of what works and what does not.

Maybe I am ignorantly cavalier, but having lived/traveled for several years in areas where dengue (as well as yellow fever, malaria, and many other non-mosquito bourne tropical diseases) are endemic--and seeing life go on as normal--it really appears to be a numbers game. Chances are slim of contracting mosquito-bourne diseases with a few bites per month. Hundreds of bites per day for folks in particular circumstances mean much higher chances, obviously.

Hawaii seems to have dengue outbreaks with years of not much in between. I have always been surprised that many tropical diseases like Dengue aren't endemic in Hawaii. I know a woman who got dengue 3 different times in Tahiti (where it is endemic). She has no fond memories of it but it is rarely fatal in a healthy person.

So what has worked for me? Not worrying about it so much, and using sprays when mosquitos are annoying enough to notice. I figure if I worry instead about rat-lung disease and the warm pond flesh-eating bacteria, that will keep the Dengue at bay. Wink

In northern Wisconsin many live in fear of Lime Disease, even if the serious warrior mosquitos there make the Hawaiian mosquitos appear as the miniature offspring of Hello Kitty and My Little Pony. The tropics likely harbor more infectious disease than the temperate regions, and at the risk of paraphrasing dakine Wink, if someone is living in great fear of Dengue, maybe the tropics isn't for them.

Mosquito nets are cheap and effective if people are getting bit at night.

for a map and overview: http://www.cdc.gov/dengue/epidemiology/

Cheers,
Kirt

typo
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#12
Originally posted by PauHana
I attended the Keaau Dengue meeting, put on by Dept of Health and Civil Defense.

The Dept of health is spraying Aguastar with the active ingredient Bifenthrin. (They said individuals cannot buy this.)


Thanks for the run down! It's interesting that at the Hilo meeting (and referenced by the Trib) they said they are spraying Aqua-Reslin (with Permethrin). As these are both pyrethroid compounds they will be quite similar in action, just noting the difference in information given at each meeting.

http://www.hawaiitribune-herald.com/news...ng-weekend

HOTPE - One dengue infected person (known or unknown) may be bit multiple times by multiple mosquitoes, which then fan out through the crowd to infect many others. Who then go home and transmit the virus to family and neighbors.

Carey - the mosquitos are just carriers (vectors) for the vectors, they do not actually "get" the virus

Of course it's best not to mingle or travel if you think you're infected, but there is actually a 8-12 day incubation period in the mosquito for the dengue virus so a mosquito that bites an infected person (with high levels of the virus and likely symptomatic) would not immediately transfer the virus to others bit at the same time.

http://www.nature.com/scitable/topicpage...n-22399758
"The mosquito must take its blood meal during the period of viremia, when the infected person has high levels of the dengue virus in the blood. Once the virus enters the mosquito's system in the blood meal, the virus spreads through the mosquito's body over a period of eight to twelve days. After this period, the infected mosquito can transmit the dengue virus to another person while feeding. Does a mosquito infected with the dengue virus only transmit the virus to the next person it feeds on? No, once infected with dengue, the mosquito will remain infected with the virus for its entire life. Infected mosquitoes can continue transmitting the dengue virus to healthy people for the rest of their life spans, generally a three- to four-week period."
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#13
In northern Wisconsin many live in fear of Lime Disease, even if the serious warrior mosquitos there make the Hawaiian mosquitos appear as the miniature offspring of Hello Kitty and My Little Pony.

I lived in west central Wisconsin years ago during a period of a mosquito borne encephalitis outbreak. One evening while doing dishes I paused at the sink trying to identify and locate an unusual humming sound. After a few moments I looked up at the open window behind the sink, and nearly the entire screen was filled with hundreds? even thousands? of commando sized skeeters trying to get at me.

I didn't go out much that summer, and didn't contract encephalitis either.
"I'm at that stage in life where I stay out of discussions. Even if you say 1+1=5, you're right - have fun." - Keanu Reeves
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#14
there is actually a 8-12 day incubation period in the mosquito for the dengue virus

Thanks ironyak, if the incubation period is 8-12 days (longer than I realized), allow me to correct my original statement to:

One dengue infected person (known or unknown) may attend a meeting, be bit multiple times by multiple mosquitoes, which after 8 -12 days could infect people at subsequent meetings at the same location.
"I'm at that stage in life where I stay out of discussions. Even if you say 1+1=5, you're right - have fun." - Keanu Reeves
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#15
Fair enough HOTPE - just sort of agreeing with Kirt that it's unlikely she would be likely to transfer the virus if she's already been symptomatic and had been tested (although can easily imagine those seated nearby edging away and whipping out the DEET after her announcement Smile
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#16
quote:
Originally posted by PauHana

Lavender oil: Wholesale Direct From The Manufacturer
http://www.bulkapothecary.com/essential-...ender-oil/
$46.58 for 16 oz (Lavender Essential Oil
I didn't price shipping)


Yeah except I believe that's for a life time supply. ya need to google it because, ya sposta mix a little, 15 mil makes an 2% solution of 750 mil (average wine bottle size) with whatever you're making it with. use undiluted in infrequent aides as for a bite and such otherwise you can get a severe reaction.

There's bunches of different mixtures adding other oils too, that seem to be offered by a ka-zillion sales sites but thinning it out so ya can spray it on like a commercial bug repellent seems to be the ancient trick.
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#17
I initially used a 24" diameter exercise ball that I got from WalMart for $10 but it was too big. The shade cloth fits very well and is pulled tight like a trampoline by bungee cords around the perimeter. The larger ball would stretch the cover and then it would sag more when the level was lower. I replaced it with an inflatable plastic ball also from WalMart that cost $1.99. It lasted a couple of years until I upgraded my floating intake. I now use a 24" x 24" x 1" piece of pink foam from Home Depot. When the tank is overflowing as it is right now you can see the outline of the square of foam under the mesh. As soon as it stops raining the shade cloth drips dry, gets lighter, and lifts off the foam. Granted my cover fits very well. I often lay out clean laundry on it to dry.
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#18
Chart with estimated protection times for mosquito repellents.

https://cdn.shopify.com/s/files/1/0236/7...4155318772

jpg is from this link.


http://www.travmed.com/pages/health-guid...prevention
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#19
From the bits and pieces of information the DOH puts out, plus some research on my own, my understanding is that once the skeeter bites someone it takes about 5 days for the viral load in the mosquito to get high enough to reach the salivary glands (gross, right?) After that the mosquito is a carrier who can give the virus to others. These mosquitos live about 2 weeks, occasionally 3. When that mosquito bites a person the viral load has to get high enough in their blood stream to make them a carrier, but another mosquito then has to bite them and then go through the same process before it is an effective carrier. So the best thing about this is that it isn't super easy to get, but people can be infectious before they are symptomatic by a day or two, so that is the narrow window when they can carry the virus into new areas.

I really wish the DOH would publish a simple clear illustrated flow chart showing how this all works, I had to go through a bunch of articles that would each mention one small part of the cycle, but nowhere had a simple clear explanation that the average resident of Hawaii Island could understand. That information needs to be widely disseminated and translated into the commonly used languages here on the island, especially for the coffee pickers and other ag workers who go from area to area to work and are often housed in conditions that could lead to infection. We do not want people to end up spreading Dengue just due to ignorance.
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#20
Thanks, ironyak you are correct.

The State is spraying Aqua-Reslin by Bayer Environmental Science Active(s) - Piperonyl butoxide + Permethrin.

Aquastar was mentioned in another conversation with an entomologist and I stated it's use by mistake. Apologies.
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