Low in the Vitamin D Department

  • How much sun you need to get enough Vitamin D depends on where you live, the time of year, how much skin you're exposing - and even the color of your skin. (Photo source: Kallerna at Wikimedia Commons)

According to two recent studies,
most kids in this country aren’t
getting enough Vitamin D. Scientists
say a lot of adults are low in the
vitamin, too. Ann Dornfeld looks
at whether the solution is as simple
as spending more time in the sun:

Transcript

According to two recent studies, most kids in this country
aren’t getting enough Vitamin D. Scientists say a lot of
adults are low in the vitamin, too. Ann Dornfeld looks at
whether the solution is as simple as spending more time in
the sun:

(sound of kids building sandcastles on the beach)

If you’ve been to the beach this summer, or anywhere
outdoors, you probably slathered on the obligatory
sunblock. If you were extra-careful, you wore a wide-
brimmed hat, or made sure your kids wore t-shirts in the
water instead of a skimpy suit.

Thing is, the solar radiation you work so hard to avoid is
also kind of healthy. That’s because it creates Vitamin D
through a chemical reaction in your skin.

“Vitamin D is essential.”

Susan Ott is a professor of medicine at the University of
Washington.

“It’s actually a steroid hormone that helps you absorb
calcium from your diet. And it works in your intestines so
the calcium can get into your system and become
available to the bones.”

Ott specializes in bone diseases like osteoporosis and
osteomalacia – both diseases that Vitamin D helps
prevent.

When you slather on sunblock, you’re also blocking the
creation of Vitamin D.

Before you run outside to soak up the last few rays of
summer unprotected, there’s a catch. Ott says no one
knows how much sun you need to get enough Vitamin D.
It depends on where you live, the time of year, how much
skin you’re exposing – and even the color of your skin.

“People with dark skin do not make as much Vitamin D
with the same amount of sunlight exposure – they need to
be out in the sunlight longer to get the same amount of
Vitamin D as a fair person.”

Scientists don’t have a way to recommend how much sun
you need to get enough D.

Kim Nowak-Cooperman is a nutritionist at Seattle
Children’s Hospital. She says a recent study looked at
people who live in Honolulu.

“They looked at 93 people who got three or more hours of
sun every day for five days a week. And they actually
found that half of those people were Vitamin D insufficient,
when you would think that they would be very, very high in
Vitamin D.”

Getting your Vitamin D from food can also be hard. It’s
naturally abundant only in oily fish like sardines, salmon
and mackerel. Since the 1930s, Vitamin D has been
added to milk to prevent the bone-softening disease
rickets in children. Now rickets is making a comeback.

Nowak-Cooperman says that’s because most kids don’t
drink enough milk to get the recommended daily
allowance of Vitamin D. And even that recommendation
might not even be enough.

“Originally that number was derived from the amount of
Vitamin D that would prevent rickets. We are now seeing
that Vitamin D has a more important role and that the
insufficiency of Vitamin D can be implicated in other
disease processes.”

Studies show Vitamin D might prevent everything from
rheumatoid arthritis to diabetes to tuberculosis. So the
American Academy of Pediatrics now recommends kids
get twice the US RDA for Vitamin D. That means 400 IU from either four glasses of milk or a
supplement.

Professor Susan Ott says adults should take a
supplement, too. She recommends 800 to 1000 IU. Any more than that, she says, and you risk
absorbing too much calcium.

“I think right now there’s a fad and people are taking too
much. I just went to the drugstore the other day and I saw
pills that were 5000 units. That’s enough to last you a
week! And I have patients that are taking that every day.
I’m worried they’re gonna get kidney stones.”

Ott says there’s also a trend for people to get blood tests
to determine whether they’re getting enough Vitamin D.
She says unless you’re elderly or have other serious
health problems, it probably isn’t necessary.

So what should you do? Ott says just pop that daily
supplement – 400 IU for kids, 800 for adults – and
keep slathering on the sunblock.

For The Environment Report, I’m Ann Dornfeld.

Related Links

Not All Sunscreens Created Equal

  • The Environmental Working Group is critical of the Food and Drug Administration for not requiring sunscreens to filter out UVA rays (Photo courtesy of the National Cancer Institute)

Labor Day weekend means backyard
grilling, maybe some time at the
beach. The last holiday of summer
usually includes a lot of time outside.
Lester Graham reports sunscreen
seems like a good idea, but there’s
some controversy about what works:

Transcript

Labor Day weekend means backyard
grilling, maybe some time at the
beach. The last holiday of summer
usually includes a lot of time outside.
Lester Graham reports sunscreen
seems like a good idea, but there’s
some controversy about what works:

The Environmental Working Group issued a report saying not all sunscreens are equal. The group is critical of the Food and Drug Administration for not requiring sunscreens to filter out one kind of solar radiation.

“There currently are no requirements for UVA filters in sunscreens. And they’ve been working on sunscreen standards since 1978.”

David Andrews is a senior scientist with the group. He’s says with a gap in FDA regulation, the industry is making unverified statements about how well sunscreens protect.

“So these are claims that are very misleading to the consumer and it makes it hard for everyone to get adequate protection.”

The Personal Care Products Council is a trade group for sunscreen makers. It says the Environmental Working Group’s report is – quote – “unscientific and unsubstantiated.”

Bottom line: look for a sunscreen that does protect you from both UVB and UVA rays, reapply often, and stay out of the sun as much as possible.

For The Environment Report, I’m Lester Graham.

Related Links

Getting Water to the Dry, Dry West

  • Colorado Springs pumps water through the Rocky Mountains into town (Photo courtesy of the Colorado Springs Convention and Visitors Bureau)

Out West, a lot of cities figure many more people will be moving in over the next few decades. Water engineers wish those people would bring along all the water they’ll need, but of course they won’t. Shawn Allee reports these cities want to pipe more water from far away, and some people think that’s a bad idea:

Transcript

Out West, a lot of cities figure many more people will be moving in over the next few
decades. Water engineers wish those people would bring along all the water they’ll
need, but of course they won’t. Shawn Allee reports these cities want to pipe more
water from far away, and some people think that’s a bad idea:

The air in Colorado Springs is usually so dry it quickly chaps your lips.

What gives? Colorado Springs sounds wet enough.

“There’re really no springs in Colorado Springs, so when you start talking
about water, it’s a divergence between our name and reality. Sounds like we
had a lot, and in reality we didn’t.”

This is Matt Mayberry, Colorado Spring’s historian.

I’ve heard about this massive water pipeline project the town’s cooking up, and I was
curious just how long the city’s worked to quench its thirst.

Mayberry’s got an exhaustive book on that with an exhaustive title.

“Blah, blah, blah … the emergence and appropriation of rights in Colorado
Springs.”

The crib notes version?

Early on, buffalo manure poisoned Colorado Spring’s creek, so people dug wells.

Then, the wells got infested with grasshoppers.

And the town grew, and grew, and grew again.

“Very soon you had to bring water from further away, and ultimately to the
Western Slope which is a couple hours drive of here.”

Today, Colorado Springs pipes water through the Rocky Mountain range.

Doing the extraordinary for water is kinda ordinary for Colorado Springs.

Its latest pipeline project is called the Southern Delivery System, and it’ll pump nearly
80 million gallons into town each year – and it’ll pump that water forty five miles –
completely uphill.

Impressive, but some people are asking tough questions about it.

“Our concern with this project is the greenhouse gas emissions that it would
contribute to.”

Stacy Tellinghuisen is with Western Resource Advocates, a Colorado environmental
group.

She says there’s a connection between pumping water uphill and a large carbon
footprint.

“Water is heavy. Pumping it over a great distance takes a lot of energy, and
in the process it would require something along the lines of 60 MW of power,
which is about a tenth of a power plant.”

And, for the most part, the utility burns natural gas and coal to generate power. Both
emit carbon dioxide, a greenhouse gas.

Tellinghuisen says Western cities are considering at least five other water pipeline
projects, some with even larger carbon footprints.

She wants Colorado Springs to set an example by using dedicated low-carbon sources
like wind power for its water pumps.

I ask the Colorado Springs Utilities about that.

Keith Riley helped plan the Southern Delivery System.

“We think there are some ways we can minimize the carbon footprint by
looking at some new technologies.”

Riley says there were lots of environmental regulations to wade through before the
Southern Delivery System got approved.

But a large carbon footprint doesn’t disqualify utility projects.

Riley says, even if carbon were considered, the project might have gone forward
anyway because the city’s expected to grow over the next few decades.

“Water is the essential element for all of us, so when it comes to that level of
sustaining our own lives, then you get to some trade-offs on what we’re
willing to do to keep ourselves alive where we we live, where our cities are.
No matter what happens, we’ve got to move water to Colorado Springs, and
we’re uphill from the river, so we’ve got to get the water uphill one way or
another.”

Riley says Colorado Springs Utilities is considering low-carbon renewable power for its
new pipeline.

But it’ll be expensive, and no one’s stepped forward with all the money.

Other Western cities are engineering clever ways of moving loads of water around,
too. And it’ll be a political and financial challenge for them to pay for the carbon
footprint.

For The Environment Report, I’m Shawn Allee.

Related Links

Sagging Mattress Recycling

  • The city of Toronto has started collecting old mattresses at a central recycling center. (Photo by Julie Grant)

One of the bigger things we
throw away are old mattresses. Landfills
are stuffed full of them. Julie Grant
reports that new companies are springing
up to recycle the steel and cushioning
from old mattresses. They say the government
could help, but it’s lying down on the job:

Transcript

One of the bigger things we
throw away are old mattresses. Landfills
are stuffed full of them. Julie Grant
reports that new companies are springing
up to recycle the steel and cushioning
from old mattresses. They say the government
could help, but it’s lying down on the job:

(sound of a mattress factory)

Simon Zysman has been working with mattresses for more
than half-a-century. For the past 16, he’s been running a
business in Toronto that tears old mattresses apart so the
pieces can be reused.

“i’ve only dismantled with my own hands 3,000 used
mattresses and my enterprize in the 16 years has only
dismantled 40,000 mattresses, and therefore i know very
little. I’m just learning.”

Yeah, like Lance Armstrong is just learning to ride a bike.

Now, apparently dismantling mattresses is not a cushy job.

(sound of mattress deconstruction)

Workers pull mattresses from a big pile. I watch one as he
makes a long cut all around the edge, snips material where
it’s connected to the coils. And then pulls the entire face of
the cushioning away from the springs. It’s kind of like
filleting the mattress.

When he’s done, the cushioning goes on one pile. The steel
springs on another.

Zysman sells the different parts to companies in the U.S.
that rebuild mattresses. Other people in the business just
recycle the steel and sell the cushioning for things like
carpet-padding and oil filters.

Zysman used to toss and turn when he thought about the
huge numbers of mattresses out there, but his supply’s not
been steady.

When you buy a new mattress, a lot of times the company
that delivers it will pick up your old mattress. Most
companies just send them to the dump. Only a few pay
people like Zysman to have them dismantled.

Until recently those few have provided Zysman’s only
supply.

But the city of Toronto has started a pilot program to collect
old mattresses from residents at the curbside for companies
like Zysman’s.

“The city’s pioneering mattress recycling program has been
a great boost to us and a great help to us. That is a
wonderful development.”

(sound of a recycling center)

The mattresses the city picks up are stockpiled at a recycling
center.

Bryan Farley runs the city’s new program. He says Zysman
and other people like him are getting paid to keep
mattresses from stuffing the landfill.

“Landfill space in Ontario is a premium. It’s hard to find.
And there are laws and regulations that are more focused on
not putting materials into the landfill.”

Farley figures getting mattresses out of the waste stream will
help the city to meet its ambitious goal of reducing trash by
70%.

Mattresses take up a lot of space. They’re big and bulky and
don’t smash down all that well in a landfill.

South of the Canadian border, in Ohio, Chuck Brickman has
been piecing together a mattress recycling business.

He wishes the government here would help increase the
supply of used mattresses. Brickman can get some from
local hotels and furniture stores, but it’s not enough so far to
run a steady business.

“There’s two companies right now in New Jersey that are
sending 2 to 5 thousand mattresses a month by rail from
New Jersey to a landfill in Michigan.”

Why? It’s cheap.

A few cities and states have special landfill fees for bulky
items like mattresses, but most don’t. So, it’s usually
cheaper just to dump them.

Brickman wants local or state governments to create more
‘incentives’ for the mattresses to be recycled. In other
words, higher fees to dump mattresses.

“It’s easier and more economically feasible for them to throw
them in a couple rail cars and send them a couple states
over because there are no established tipping fees in some
of the Midwestern states like Ohio and Michigan.”

Mattress recyclers say government officials can raise those
fees on dumping mattresses. That would make the mattress
recycling business less of a dream, and more of a reality.

For The Environment Report, I’m Julie Grant.

Related Links

Active Spring Flooding Season

  • Dutchtown, MO, March 20, 2008 -- Areas remain under flood water. Much of Missouri has been affected by recent flooding. (Photo by Jocelyn Augustino, courtesy of FEMA)

Spring floods are hitting some parts of the country,
and the National Weather Service predicts high waters might hit
more states. Chuck Quirmbach reports:

Transcript

Spring floods are hitting some parts of the country,
and the National Weather Service predicts high waters might hit
more states. Chuck Quirmbach reports:

There were record snowfalls in some northern, eastern and western states during the winter. Soil
moisture in some areas is very high. With the potential for spring rainstorms, the National
Weather Service says conditions are above average for flooding. Deputy Director Vickie Nadolski
says the threat will last a while.

“As you see the temperatures start to warm up in the summer, then certainly the ground will start
to dry out a bit more, but right now it’s quite saturated.”

Nadolski urges the public to listen to warnings of flash floods and river flooding. She warns
against driving or walking into flood waters.

The National Weather Service says soil moisture is not as high in states with prolonged droughts,
and that a lot of rain or snow there will bring temporary improvement to local reservoirs.

For The Environment Report, I’m Chuck Quirmbach.

Related Links

Manure Spreading Pollutes

The government is studying ways to reduce water pollution from
spreading manure on farm fields. Lester Graham reports some experts
believe the way many farmers spread manure is more likely to pollute
lakes and streams:

Transcript

The government is studying ways to reduce water pollution from
spreading manure on farm fields. Lester Graham reports some experts
believe the way many farmers spread manure is more likely to pollute
lakes and streams:


A lot of times, farmers don’t spread manure for fertilizer in the spring because
it can get in the way of opportunities to plant. So, a lot of farmers
spread manure in the winter. But spreading liquid manure on the frozen
ground means it doesn’t get plowed into the soil. Snow and rain can
wash the manure over the frozen dirt and into waterways.


Steve Jann is involved in a study by the Environmental Protection
Agency and the U.S. Department of Ag:


“When that runoff occurs it can carry manure pollutants with it. And
those pollutants when they enter surface waters can kill fish or allow
pathogens to enter surface water.”


And if that river or lake supplies drinking water, it can make people
sick. The study will compare pollution levels in waterways from
manure-spreading in the winter and the spring to see if pollution
from farm fields can be reduced.


For the Environment Report, this is Lester Graham.

Related Links

Mysterious Disappearing Bees

  • Brownish-orange bumps on the backs of these bees are Varroa jacobsoni mites, a possible cause of CCD. (Photo courtesy of the USDA)

Millions of honeybees across the country are dying
mysteriously. Entire hives or colonies of bees are
collapsing. Scientists say it’s some new threat. They’re scrambling to find answers.
As Bob Allen reports, bees are crucial in pollinating billions of dollars worth
of crops every spring:

Transcript

Millions of honeybees across the country are dying
mysteriously. Entire hives or colonies of bees are
collapsing. Scientists say it’s some new threat. They’re scrambling to find answers.
As Bob Allen reports, bees are crucial in pollinating billions of dollars worth
of crops every spring:


That fresh crisp apple you bite into for lunch comes from
a bee pollinating an apple blossom, but honeybees in the
U.S. are under tremendous stress. A new threat is
devastating them. It can wipe out entire colonies.


There’s plenty of honey still left in the hives to feed
the bees, but the bees have vanished. Scientists are
baffled. They’re calling it “Colony Collapse Disorder.”


Dennis van Englesdorp is bee inspector for the state of
Pennsylvania. He says the disorder first showed up in his
state last fall. But it’s now threatening the entire
beekeeping industry:


“We could not sustain the level of loss we’re seeing this
year several years in a row. And there are crops that are
90 to 100% reliant on honeybees for pollination. You need
bees for apples. And if you don’t have bees you don’t have
apples.”


A research team at Penn State University has given
themselves until fall to come up with some answers.


On a hilly farm in northern Michigan, Julius Kolarik raises
apples, cherries and honeybees. It’s a sunny day with the
temperature nudging near 50 degrees:


“So, no, it’s a beautiful day for bees. Makes you feel
good when you see bees flying. Makes me feel good
(laughs).”


This is the first time Kolarik has checked his bee yard
since fall. He uses his hive tool to pry the top off each
three-foot high colony to see how the bees are doing:


“We can see that they’re alive and that’s the main thing.”


It used to be considered an embarrassment if a beekeeper lost more
than 10% or so of his bees annually, but things have
gotten a lot tougher in recent years.


Parasitic mites have infested honeybees just about
everywhere. They’ve weakened the bees and left them
vulnerable to diseases and that’s meant annual losses
double what they used to be.


Now on top of that, there’s this new disorder. But Julius
Kolarik is not so sure how new it is. He’s been
raising honeybees since he was a kid:


“We’ve seen some of the same symptoms, so uh, through the
years. Even before we finally said that we have mites, uh.
We were getting unexplained losses. But now it’s come back
again. ‘Cause other years guys have lost whole yards but
left one or two hives.”


Bee researchers say previous outbreaks of colony collapse
were isolated incidents. This time it’s spread across the
country.


Tom McCormick’s small beekeeping operation supplies honey
to local markets in western Pennsylvania. That is, it did
until two years ago. That’s when he says collapsing
disorder killed half his colonies, so he bought more bees
to replace them. They did OK last year, but this spring
he’s looking at an 80% loss:


“To me it doesn’t make sense to go buy more bees and throw
them right back into the same situation without any idea
what the cause is.”


McCormick says two of his beekeeping friends have been
totally wiped out. And they’ve been seeing more than one
thing going on in their hives:


“One, we see hives full of honey and no bees. Totally
gone. We see other situations where we have a nice large
cluster of bees with honey all surrounding them and the
bees dead.”


When he reported this two years ago, he says, state
officials ignored him. Pennsylvania state beekeeper Dennis van Englesdorp admits
he thought McCormick had a serious mite problem at first.


But now researchers at Penn
State are checking other possible
environmental stresses that could be killing honeybees.
van Englesdorp says pinpointing the cause can be just
as difficult with bees as it is with humans:


“You can get a heart attack if you don’t eat well, if you
drink too much, if you smoke, you’re genetically disposed
to a heart attack. It could be one of those factors. It
could be a lot of those factors combining together.”


For this year, he says, the disorder means the number of honeybee colonies will be lower,
but he expects there to be enough to meet pollination
demands.


For The Environment Report, I’m Bob Allen.

Related Links

Restoring Streams in the Heartland

  • Settlers dug ditches and straightened rivers to drain the fields they needed for planting. (photo by Mark Brush)

Today, we wrap up our series on pollution in the heartland.
To farm in the nation’s heartland, people first had to drain the water from the land. In a lot of places, that meant dredging rivers to get them to move along faster and carry water off the fields. But straight, fast rivers aren’t healthy rivers. And the rushing water carries pesticides and fertilizers off of fields and deposits them downstream. But in some places, farmers are starting to repair rivers. The GLRC’s Rebecca Williams has the final story in our week-long series:

Transcript

Today, we wrap up our series on pollution in the heartland. To farm in the nation’s
heartland, people first had to drain the water from the land. In a lot of places, that meant
dredging rivers to get them to move along faster and carry water off the fields. But
straight, fast rivers aren’t healthy rivers. And the rushing water carries pesticides and
fertilizers off of fields and deposits them downstream. But in some places, farmers are
starting to repair rivers. The GLRC’s Rebecca Williams has the final story in our week-long series:


From an airplane, the land below it looks like it was drawn in geometry class. Fields
of corn and soybeans look almost like perfect squares. Rivers seem as straight as a ruler’s
edge.


When rivers have their way, they’re unruly. They have lots of twists and bends, but people have straightened a lot of rivers and streams to make it easier to grow crops
and raise animals. European settlers forging their way West got stuck in huge swamps.
The mosquitoes were terrible. But the settlers’ chances of raising food in the swampland
were even worse.


“In order to reclaim that land, muckland, for raising vegetable crops, they had to drain it.”


Barb Cook owns a farm here in fertile southwest Michigan. Her grandfather farmed here
in the early 1900s, back when the rivers were being straightened.


(sound of river)


Cook’s standing on the bank of the Dowagiac River. Right now it’s as straight as a canal
and it’s moving fast. But it’s about to get some of its curves back.


Barb Cook says she was skeptical when she heard about the plan to coax the river back to
its original path.


“Well, they want to put the wiggles back. Well, why? Were they trying to hoodwink
anyone or were their objectives pure? And I got involved and felt they were really truly
trying to improve things.”


Cook’s now the vice president of the group. It calls itself MEANDRS. It’s made up of
farmers and biologists and fishermen. People who all have a stake in what happens to the
river.


They’re carving out one of the curves the river used to follow.


Jay Wesley is a biologist with the Department of Natural Resources. He says even
though this new meander isn’t connected to the river yet, little springs are bubbling up.


“We’ve actually even seen trout in here since this first part of the project’s been done.
They’ve come up through the culvert from the river and have found their way up here.
So it’s pretty cold, high quality water.”


That’s exciting news for fishermen. A river fed by cold groundwater can be a mecca for
trout. The pools and riffles sculpted into the new meander will give fish places to hide.


These small signs of hope are a pretty big deal. This project is a very long labor of
love 12 years in the making.


That’s because there are lots of hurdles. For one thing, meander restorations are
expensive. Half a million dollars at the low end.


There are piles of paperwork.


And some farmers worry that restoring meanders will flood their fields.


In this project, the MEANDRS group surveyed nearby farmers early on about their
concerns and included them in the planning process. Bill Westraight is the President of
MEANDRS. He’s also a farmer who owns land along the river.


“I think what I say holds more weight with farmers than if somebody had come down and
was mandating that they participate in some way.”


Westraight says they had some major critics in the beginning. But he says they’ve gotten
almost all the neighbors on board. He says it was crucial that they gave everyone a say.
They also commissioned feasibility studies to make sure upstream farmers wouldn’t be
flooded.


All these hurdles mean that projects like these aren’t very common.


Andrew Fahlund is with the nonprofit group American Rivers. He says big projects like
meander restorations almost always need government funding. And that funding’s been
cut dramatically over the past few years. Fahlund says those cuts are short-sighted
because healthier rivers can actually save money in the long run.


“One of the reasons you get such an economic benefit from river restoration is that you
reduce the costs of having to treat water, filter
that water and clean it up for human consumption.”


(river sound up under)


The MEANDRS group says there’s no way they can restore the entire river. But they
hope mending just this small section will help revive the river a bit.


The group points out that this type of restoration won’t work everywhere. They say in
many places, channelized rivers are still crucial for keeping fields drained.


Farmer Barb Cook says even now, she sees this project as an experiment. In a few
months, she’ll get to see whether all her hard work will pan out, when they’ll try to force
water from the straight channel into the new meander.


“As you look at the stream behind us, it’s quite a volume of water. Water has its own
way. Mother Nature has something to say about this too. She may say no.”


Cook says nothing ever runs smoothly. But she says they’ll just be flexible and this time
around, let the river choose its course.


For the GLRC, I’m Rebecca Williams.

Related Links

Bumper Crops of Mosquitoes

  • A mosquito taking a blood meal. Only a tiny fraction carry West Nile virus, but health officials say it's best to avoid being bitten. (Photo by Lester Graham)

With above normal rain in much of the country this spring… mosquitoes have been heavier in many areas. The quick warm up after a cool spring has also helped hatch out a lot of the pests. The GLRC’s Lester Graham reports you only have to step out your door to see the result:

Transcript

With above normal rain in much of the country this spring mosquitoes have been heavier in many
areas. The quick warm up after a cool spring has also helped hatch out a lot of the pests. The
GLRC’s Lester Graham reports you only have to step out your door to see the result:


It’s not so much hot days, but the fact that the nights are warmer that’s helping the skeeter broods
hatch out in hordes. I’ve been painfully aware of the mosquitoes this year because I live right next
to a river in a year where there’s been plenty of rain to make little pools of stagnant water
everywhere. It’s a real nuisance.


(sound of mosquitoes)


“I’m in a very hot car and a lot of mosquitoes are trapped in here with me.
(pause) All these mosquitoes got here, just because I opened my hatchback and took
some groceries out, and they just swarmed in.”


(sound continues… smack!)


I don’t like ‘em much. Most people don’t have a very high tolerance for mosquitoes. They’ve
actually studied that. John Witter is a biologist with the University of Michigan who spends a lot of
time in the woods, studying bugs. He says there was a Michigan State University study that tracked
interaction of people and mosquitoes while camping.


“If you have more than about four mosquitoes landing on your body per minute, the people leave
the hiking trail. They go back to their campers because they just cannot handle that annoyance.
So, higher population numbers of mosquitoes, more bites, more annoyance.”


But not everyone, or everything, can get away from the pests. Jenny Barnett works at the Binder
Park Zoo in Battle Creek, Michigan. The zoo is in the middle of a forest. The mosquitoes love it
there.


(sound of birds)


The zoo’s tried to use different kinds of fumigation in past years, but with sensitive animals and birds
like the ones we’re watching there was a lot of concern; and really it just didn’t work.


“With 430 acres and a lot of it being wetland, we didn’t even make a dent on it. So, after a couple
of years, we stopped doing anything.”


The mosquitoes weren’t always that bad, and guests at the zoo didn’t seem to mind that much. A
little mosquito repellant and everyone was good to go.

Then along came West Nile virus. Like a lot of zoos, Binder Park put its birds inside – not good for
the birds – not good for the people who wanted to see the birds. A couple of years after West Nile
was detected, a vaccine that was developed for horses and it was used on birds, too. Jenny Barnett says it
seems to work.


“So far we’ve had success with it and we are continuing to do testing on their blood to check for
West Nile virus and we’ve been successful so far, but we will continue to vaccinate. We’ll
vaccinate our horses, and we’ll always worry about it, but a lot of the birds do have immunities right
now.”


And it’s assumed a lot of people also have immunity to the West Nile virus. They probably have been
infected and didn’t even know it. People with immune deficiencies are at much greater risk, but
many healthy adults can contract it and dismiss it as a summer cold or bad allergies, but health
officials say do what you can to avoid being bitten. Now, they’re not saying that you shouldn’t go
outside. They’re just saying if you do go outside, you should use a mosquito repellant with DEET.
Natasha Davidson is with the Health Department in Ingham County Michigan. She says don’t
douse yourself in repellant. A light spray will do.


“And if you’re applying it to your face, you should really put it on your hands first and then apply it.
And even applying it to children, it’s better an adult put on their hands first and then apply it to a
child.”


Davidson says don’t use DEET on children six months of age and younger, and don’t put it on
toddler’s hands because they’ll just put them in their mouths. Ugh… not good to ingest DEET.
Some advise using a cream based repellant because it doesn’t go into the skin as easily, and stays
on the surface where it can do some good. It’s also a good idea to wear loose fitting clothes with
long sleeves and long pants. I know it’s hot, but it beats scratching mosquito bites for days on end.
Natasha Davidson says even on heavy mosquito years like this one you can help reduce your
exposure to the pest.


“Other things that people can do is to make sure they have no standing water in their yard,
whether it’s at home or at a vacation property. Empty your gutters. Make sure that they’re clean
so that the water flows through. Make sure that you don’t have flower pots that have standing
water in it, old tires, different things like that. If you have a bird bath, change the water in the bird
bath once a week.”


Beyond that there’s not much you can do. Mosquitoes aren’t going away and with a little
preparation…


(sound of spray)


…you should just go ahead and enjoy the outdoors.


For the GLRC, I’m Lester Graham.


(sound of door opening and closing)

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BUMPER CROPS OF MOSQUITOES (Short Version)

You might be seeing more mosquitoes this year. Conditions are right in many areas to see a bigger than normal crop of mosquitoes. The GLRC’s Lester Graham reports:

Transcript

You might be seeing more mosquitoes this year. Conditions are right in many areas to see a
bigger than normal crop of mosquitoes. The GLRC’s Lester Graham reports:


The mosquito populations in a lot of places are high this year because of above normal rainfall.
Although you don’t hear as much about West Nile virus these days, it’s still a threat, especially
to those with compromised immune systems, particularly older people. Natasha Davidson is with
the Health Department in Ingham County, Michigan where there’s been a bumper crop of
mosquitoes lately. She says the best prevention is avoid getting bitten:


“Well, you want to make sure you’re wearing an insect repellant. And also when you’re outdoors
when mosquitoes are active been dusk and dawn, wear long sleeves; wear long pants; wear
socks. And apply the insect repellant to your clothing.”


So far there’s no West Nile vaccine for people. Researchers are working to come up with one.
They believe healthy people who’ve already contracted the virus and built up antibodies might be a
source for a successful vaccine in a couple of years or so.


For the GLRC, this is Lester Graham.

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