Beware Of Peak Mosquito Hours
Posted 13 July 2012 - 12:51 PM
It is a myth that mosquitos only bite in the morning and evening. Many falsely believe that it is dusk and dawn (sunrise and sunset). But the peak time is the hours between dusk and dawn. But the dengue mosquito is very active during the day.
This is from the Center for Disease Control and Prevention
Be aware of peak mosquito hours. The peak biting times for many mosquito species is dusk to dawn. However, Aedes aegypti mosquitos feeds during the daytime. Take extra care to use repellent and protective clothing during daytime as well as during the evening and early morning.
There has been alot of missinformation put forth. It is important to get the facts!
Dengue virus is primarily transmitted by Aedes mosquitoes, particularly A. aegypti. These mosquitoes usually live between the latitudes of 35° North and 35° South below an elevation of 1,000 metres (3,300 ft). They bite primarily during the day
According to the CDC it is important to apply a repellent with DEET any time you are outside, not just morning and evening. And weather permitting wear protective clothing.
Posted 13 July 2012 - 01:08 PM
We went over to the east side once, and drove back the 4 wheel drive road, during the afternoon. I had NEVER encountered so many HUGE beasts in my life. They where horrible, and we had to turn around and run for our lives.
Mosquito are our enemy.
The most important thing in life is not knowing everything, it's having the phone number of somebody who does!
Posted 13 July 2012 - 01:11 PM
Just wanted to clarify this. It was said in another thread that the dengue mosquito mainly bites in the morning and evening (sunrise and sunset).
THIS IS FALSE!
I just wanted to clear this up in a new thread. So that there is absolutely no confusion. I figured it would get lost in the other thread.
Posted 13 July 2012 - 01:34 PM
Posted 13 July 2012 - 01:38 PM
One of the worst places I have experienced mosquitos during the middle of the day was at the Belizean border.
The thing is the mosquito that carries dengue is smaller than some and less noticeable than some other larger species. They are very fast and quiet. They do not make the buzzing sound as some do,
But they most definitely bite during the day. In fact that is when they are more likely to bite you. Not at dusk or dawn. But stay protected all day long to be safe. Just because they primarily bite during the day does not make you immune at night or early morning.
Many species feed from dusk until dawn but will feed during the day in shady areas, indoors or on cloudy days. The dengue mosquito feeds during the day primarily (they like sunlight) but will also feed from dusk until dawn. And will feed in artificial light inside or outside.
Posted 13 July 2012 - 03:09 PM
Posted 14 July 2012 - 12:53 AM
From the New England Journal Of Medicine
Our study shows that only products containing
DEET offer long-lasting protection after a single application.
Certain plant-derived repellents may provide
short-lived efficacy, which may be sufficient when
arthropod bites are primarily a nuisance. Frequent reapplication
of these repellents would partially compensate
for their short duration of action. However,
when one is traveling to an area with prevalent mosquito-
borne disease that could be transmitted through
a single bite, the use of non-DEET repellents would
seem to be ill-advised. Given our findings, we cannot
recommend the use of any currently available non-
DEET repellent to provide complete protection from
arthropod bites for any sustained outdoor activity.
Although this study shows that DEET-based products
can be depended on for long-lasting repellent
effect, they are not perfect repellents. DEET may be
washed off by perspiration or rain, and its efficacy
decreases dramatically with rising outdoor temperatures.
Despite the substantial attention paid by the lay
press every year to the safety of DEET, this repellent
has been subjected to more scientific and toxicologic
scrutiny than any other repellent substance. The extensive
accumulated toxicologic data on DEET have
been reviewed elsewhere.
DEET has a remarkable
safety profile after 40 years of use and nearly 8 billion
Fewer than 50 cases of
serious toxic effects have been documented in the
medical literature since 1960, and three quarters of
them resolved without sequelae.
Many of these
cases of toxic effects involved long-term, heavy, frequent,
or whole-body application of DEET. No correlation
has been found between the concentration
of DEET used and the risk of toxic effects. As part
of the Reregistration Eligibility Decision on DEET,
released in 1998, the Environmental Protection Agency
reviewed the accumulated data on the toxicity of
DEET and concluded that “normal use of DEET
does not present a health concern to the general U.S.
When applied with common sense,
DEET-based repellents can be expected to provide a
safe as well as a long-lasting repellent effect. Until a
better repellent becomes available, DEET-based re-pellents
remain the gold standard of protection under
circumstances in which it is crucial to be protected
against arthropod bites that might transmit disease.
DEET is also recommended by the World Health Organization, the EPA and the Center for Disease Control and Prevention
Posted 16 July 2012 - 10:27 AM
Remember, you've never seen a grouper with a mosquito bite
Posted 16 July 2012 - 10:56 AM
Posted 16 July 2012 - 07:47 PM
Posted 16 July 2012 - 10:38 PM
Those eastside SOBs will just drain you in three bites or carry you off.....
Posted 16 July 2012 - 11:05 PM
Lets say we cut all those numbers in half. Lets say an infected female lives for two week and lays two batches of eggs of 100. Lets say half of those are females. That would be 100 and lets say each of those lays an additional 200 eggs and of those half are female which would be 100 each. That would be 100,000 dengue transmitting mosquitoes in a little over a month from one infected female with more conservative numbers of half of the max potential.
But if a female lived her maximum life and had availability of a rich blood supply and laid her maximum potential of eggs and all survived and the same thing happened which each female. Then one female could produce an maximum of 250,000 females which could carry the disease, with a ratio of 1:1 male to female. But if you factor in even a 1% reproduction and survival rate one female could produce over 2000 offspring, and consecutive offspring, in her lifetime capable of spreading the disease. And each of those 2000 the same.
Of course all these numbers are the maximums and would be way way over inflated, and understanding statistics could never happen. Obviously not all females will live for a month and will not lay 5 batches and not all of those batches will be 200 eggs ( depending on amount of blood ) and not all those will survive and of the ones that do not all will be females. And the one month figure would be longer when you add in incubation periods, I believe one to two weeks, and depending on how long each batch of eggs stay dormant before hatching. But it is possible that from one infected female it can spread over twelve blocks within a short time. And one female could lay up to a maximum of 1000 eggs during that time, and each surviving female from those potential 1000 eggs would continue to spread it through her offspring of a potential 1000 eggs. This is why it is almost impossible to eradicate. It has been done in some places. But it takes a huge commitment of resources. I read somewhere that when China was looking at a program to eradicate mosquito transmitted disease it would require, if my memory serves me correct, up to 50% of their entire health services budget. Something which is impossible for most countries. But dengue and malaria had been all but eradicated in some parts of the world. But later to make a comeback in others.
Eradication efforts like spraying of pesticides do very little to control the mosquito population. It will only kill the mosquitoes that are in sight at the time and that come in contact with the pesticide. Studies have shown that in some cases spraying actually increases the mosquito population because it indiscriminately kills other beneficial insects. Same with bug lights and "zappers". Studies have shown that homes with bug lights have more mosquitoes than homes without. They draw more insects to the area. Kill more beneficial insects and leave more mosquitoes to feed. Ultrasonic devices do not work. In studies mosquitoes will actually land on the devices and probe them. They are supposed to simulate the sound of dragonfly or bat wings or other insects that feed on mosquitoes. They do not work. The others that are supposed to emit a sound which drives the mosquitoes away do not work either. But it's your money. The only repellent that has been proven to provide long term protection are products containing DEET. As has been discussed before there are natural oils that repel mosquitoes. But at the concentrations that work they are toxic. So when they are diluted to levels that are safe they only provide short term protection requiring the user to reapply every 10 to 20 minutes depending on the product. DEET is the safest and most effective product.
Interestingly perhaps the best chance of significantly reducing the disease may be introducing more dengue mosquitoes. Genetically altered mosquitoes. The method has had some real promise in areas with high percentages of malaria. But the biggest drawback is there are some who refuse to trust science and research. The biggest obstacle is a skeptical public. Some will never trust in the best research and development available. There will always be doubters. Some people refuse to believe in global warming which has been a real contributing factor in the spread of mosquito born illnesses.
Posted 17 July 2012 - 10:48 AM
Posted 17 July 2012 - 01:34 PM
Posted 17 July 2012 - 01:54 PM
I am pretty sure it would be because they would be sterile and the female would not lay eggs so the disease slowly goes away with each cycle. That would be my educated guess. But I would have to confirm that. This method has allready been in use in other parts of the world with the malaria carrying mosquito with success.
It would appear to be males shooting blanks. Here is an article from the Keys.
Posted 17 July 2012 - 02:18 PM
An update: I just read that the average female will lay from 1000 to 3000 eggs in her lifespan. So if you interupt just one female with a sterile male you start reducing the spread. And they do have a longer range than was was previously thought. Can be as far as 250 meters and possibly more. So if each female offspring from those 3000 surviving eggs can lay the same amount of eggs and they can survive a year or more in the dry state and travel up to three blocks or so, you can see how you would be at risk if bitten in your own backyard.
Posted 17 July 2012 - 03:02 PM
The indication, or sign, of global warming is that the globe is "warming". Simply put heat is the indication of global warming. Rising temperature of the Earth. But I assume you meant to phrase your question differently?
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