Dr. Robert McLean works on a West Nile disease project at the National WIldlife Health Center with a Carolina Chickadee (Photo courtesy of the US Fish and Wildlife Service)
There’s a new online map for tracking
wildlife diseases that threaten animals and
people. Chuck Quirmbach reports:
Transcript
There’s a new online map for tracking
wildlife diseases that threaten animals and
people. Chuck Quirmbach reports:
Diseases such as West Nile Virus, Chronic Wasting Disease, Avian Flu, and
others are now often in the news. A website partly developed by the US
Geological Survey aims to track reports of the disease outbreaks around the
world.
Veterinarian Josh Dein leads the project. He says he hopes both health care
professionals and the general public use the online map.
“One of the things you can do is say ‘what’s happening in my neighborhood,
what’s happening in my state, my country?’ And maybe I’m traveling to
someplace else. Maybe I want to look to see what’s happening somewhere else.”
Dein says the map also allows people to narrow their search to specific countries, types of
disease and affected species.
Clear, colored plastic bottles - such as this one - are made of plastic number 7, which contains BPA (Photo by Rebecca Williams)
Recently there’s been a big concern about
bisphenol-A, or BPA, in some plastics.
Some plastic baby bottles and some water bottles have
been pulled from the shelf by retailers. Grist is an
online environmental news outlet. The journalists
at Grist have been looking at the BPA issue for a few
years. We got a chance to talk with Sarah Burkhalter
at Grist about BPA and why it’s suddenly
in the news:
Transcript
Recently there’s been a big concern about bisphenol-A, or BPA, in some plastics. Some plastic baby bottles
and some water bottles have been pulled from the shelf by retailers. Grist is an online environmental news
outlet. The journalists at Grist have been looking at the BPA issue for a few years. We got a chance to talk
with Sarah Burkhalter at Grist about BPA and why it’s suddenly in the news:
Sarah Burkhalter: “BPA has been in our bottles for a long time, and there have just been some
more high-profile studies in the last year. Back in February 2007, the National Institutes of Health
came out with a report saying that there was a link to BPA and health problems. Even at that point,
people were switching over to glass baby bottles and things like that. But just in the same week,
there was another National Institutes of Health high-profile report, just a few days separate from
when Health Canada – the Canadian Health Department – also expressed concern. So, I just think
it was in the news, and people are suddenly realizing that this is a problem.”
Lester Graham: “So, it was a one-two hit in the media, plus when you mention baby bottles, or
possibly the liners of formula cans, that gets people a little nervous, if there’s something toxic in
that stuff.”
Burkhalter: “Absolutely. And, the thing with BPA is that it’s an endocrine disrupter, it can mimic
estrogen. And so the plastics industry has been saying, ‘well, we use it in such small amounts, no,
it’s no problem’. Other studies have said that even in very, very small amounts, BPA can sneak in
and change cell structure, and really muck-up the reproductive system. And it’s been linked to
early puberty, and breast cancer, and behavioral disorders, and all kinds of things. So when they
hear about this being in, you know, things that we’re regularly eating and drinking from, they pay
attention.”
Graham: “Now, here’s the big question – we’ve seen retailers pull some bottles off of the shelves,
there’s been this controversy with Nalgene, and now even a lawsuit against Nalgene about their
plastic bottles – what plastic bottles are safe to use, what ones can’t I use, how do I tell the
difference?”
Burkhalter: “well, BPA is found in number 7 plastic – that’s also known as polycarbonate or lexan –
and that’s the clear, hard plastic. So Nalgene bottles – not the white ones – but the brightly
colored, clear ones. Those are number 7. There’s also, as you mentioned, plastic adhesive in
linings of cans, some of those, BPA is also in some dental sealants. But when it comes to bottles,
number 7 is the one you want to watch out for when we’re talking about BPA. Number 3 has its
own problems – that’s PVC or vinyl – that’s another one you want to watch out for. If you gotta use
plastic, you’re gonna want to look for numbers 2, 4, and 5.”
Graham: “So we look for those numbers on the bottom of the bottle?”
Burkhalter: “Yup. Those are, I mean, you know, they’re not on every plastic, but if there is a
number on them, its ‘2, 4, and 5 to stay alive’. It’s the rhyme I just made up.”
A layer of smog over upstate New York at sunset on October 21, 2000 (Photo courtesy of the Earth Science and Image Analysis Laboratory, Johnson Space Center)
A new report says smog can contribute to
premature death. Rebecca Williams reports:
Transcript
A new report says smog can contribute to
premature death. Rebecca Williams reports:
Ozone is a main ingredient in smog – it comes from cars and smokestacks and
other sources.
The National Academies of Science report says ozone can send people to the
hospital, and even lead to earlier death. That’s because ozone can damage
your lungs and make it harder to breathe. It can be especially bad for
kids, older people, and people with lung diseases.
Dan Greenbaum is the president of the Health Effects Institute. He worked
on the report.
“It just reinforces the risks of exposure to ozone are there, they’re
significant and people really should be paying attention to alerts when
there are high ozone days.”
Ozone alerts mean even healthy people should avoid working or exercising
outdoors during the day.
The EPA recently tightened the ozone standards. But the agency’s scientific
advisory committee said the standards should be tightened even more.
The back of a female patient with a doctor who is using a stethoscope to listen to her lungs. (Photo courtesy of the National Cancer Institute)
Public health advocates say governments and
individuals should take more precautions as global
warming continues. Chuck Quirmbach has more:
Transcript
Public health advocates say governments and
individuals should take more precautions as global
warming continues. Chuck Quirmbach has more:
Most scientists say a warmer climate will bring some good things for public health, like
longer food growing seasons in parts of the world. But Dr. Georges Benjamin also
believes the forecasts of what bad things might happen.
“We know that climate change certainly could increase air pollution, leading to increases
in things like asthma, allergy and chronic obstructive pulmonary disease”
Benjamin heads the American Public Health Association. The group is issuing a
blueprint for health professionals and the public to combat climate change.
The effort includes calls for government to provide more shelter and health monitoring
during heatwaves, and recommendations for people to be more careful during high
temperatures and heavy rainfalls. The group will also urge Congress to consider health
issues when it debates legislation to curb global warming.
This label on a package of cookies has six foods of the Big Eight. Over 90
percent of food allergies are caused by just eight foods: milk, eggs,
peanuts, tree nuts such as almonds, soy, wheat, fish and shellfish. (Photo
by Lester Graham)
Doctors say problems with allergies are
increasing. Up to 30% of Americans are
allergic to something. Rebecca Williams reports
doctors are trying to figure out why allergies are
on the rise:
Transcript
Doctors say problems with allergies are
increasing. Up to 30% of Americans are
allergic to something. Rebecca Williams reports
doctors are trying to figure out why allergies are
on the rise:
Micaela Keller is ten years old. Her world is full of things that might
make her sick.
“I’m allergic to pollen, ragweed, anything in the daisy family, nuts, all
nuts, dairy, soy, cats and grass.”
Food allergies are usually the worst allergies. Micaela says she knows
right away if she accidentally eats something she’s allergic to.
“When I have soy I will get really itchy and might get red in the face. My
lips might start swelling up or something.”
In the worst cases… allergic reactions can make it hard to breathe.
Sometimes, your airways can shut down, your blood pressure can drop and you
can die.
Experts say cases of food allergies have doubled over the past 10 years.
Kids have seen the highest increases. But no one knows exactly why.
Dr. Marc McMorris treats kids’ allergies. He’s in charge of the Food
Allergy Clinic at the University of Michigan.
He says our immune systems are so complex that there’s probably not a simple
explanation. He says there are probably at least three different things
going on.
First, allergies run in families. If both parents have allergies, there’s a
70 to 80% chance their child will have allergies.
Second, there’s the way we process food in this country. Take peanuts for
example. Dr. McMorris says dry roasting peanuts makes them more likely to
cause reactions.
Then… there’s the third thing and it’s really causing a lot of debate.
It’s called the hygiene hypothesis. The idea is: we might be too clean for
our own good.
“The immune system is put there for survival, to fight
bacteria, viruses and parasites and that type of thing and in the last 50 to 80
years we’ve had antibiotics, vaccines and a much cleaner world, and if the
immune system doesn’t have to worry about those issues as much it’s going to
find something else to do.”
So… instead of constantly fighting off bacteria… the immune system
thinks something as harmless as a peanut butter sandwich… is going to hurt
the body. So the immune system treats the peanut butter like an invader.
Dr. McMorris says there’s evidence that the more germs you’re exposed to
early in life, the less likely you are to have allergies. He says it
doesn’t make sense to go back to a dirtier lifestyle. But he says we should
be careful about some things… like not over-using antibiotics and harsh
antibacterial soaps.
He also says being exposed to some kinds of bacteria might help. He says
there’s evidence that having pets in the house might make you less likely to
develop allergies.
“The data for pets would say if you have three or more cats or dogs within a
household that you have a lower risk for allergies.”
That’s because you’re exposed to a certain bacteria animals carry. It might
help your system fight off allergies.
But Dr. McMorris says it’s not a good idea to rush out and get a litter of
kittens if you already have allergies in the family. That could make the
problem a lot worse.
Remember Micaela, the girl with all the allergies? Her mom thinks having
pets in the house does help.
(Joy to dogs: “Say hi. High five!” dogs bark)
Joy Keller says her kids have grown up with dogs. They’ve been tested and
it turns out they’re not allergic. So their doctor said they should keep
the dogs. Keller says they just have to vacuum more often.
“We’ve been told right from the beginning, keep where they sleep clean but
don’t be obsessive about cleaning, they have to live in this world and so
the world is not a sterile place.”
The world is not a sterile place. But maybe… we’re trying to make it a
little too sterile.
Chronic wasting disease is affecting many captive deer, and has now been found in New York. Some question whether the disease has spread to wild deer. (Photo by Dr. Beth Williams, University of Wyoming, courtesy of CWD Alliance)
Chronic Wasting Disease has now been found in New York
and officials there are killing and testing hundreds of wild deer. They’re trying to keep the fatal brain disease from spreading to other animals. The Great Lakes Radio Consortium’s David Sommerstein reports:
Transcript
Chronic Wasting Disease has now been found in New York and officials there
are killing and testing hundreds of wild deer. They’re trying to keep the
fatal brain disease from spreading to other animals. The Great Lakes Radio
Consortium’s David Sommerstein reports:
Five captive deer in central New York tested positive for chronic wasting
disease earlier this month. It was the first time the neurological sickness
appeared in the Northeast.
Officials’ biggest concern is whether the ailment has spread to the wild. That’s why they’re killing and sampling up to 420 wild deer near where the
disease was detected.
Ward Stone is New York’s lead wildlife pathologist. He says those measures
are important, but they may not help in the long term.
“It would be nice if we could eradicate it in the next few weeks and it
doesn’t take hold, but I think it’s here to stay and I would not be
surprised to one day see it from Boston to Los Angeles.”
Chronic wasting disease has been found in 12 states, including Wisconsin and
Illinois. There’s no evidence it affects humans. Still, the Centers for
Disease Control and Prevention recommends against eating meat from infected
deer.
The U.S. Environmental Protection Agency says it’s ready to take a new look at the science and risks involved in using treated human waste – sewage sludge – as fertilizer on farmland. That’s seen as good news for people who live near farms using sewage sludge. Some of them say the sludge makes them sick. The Great Lakes Radio Consortium’s Amy Tardif reports:
Transcript
The U.S. Environmental Protection Agency says it’s ready to take a new look at the science and
risks involved in using treated human waste – sewage sludge – as fertilizer on farmland. That’s
seen as good news for people who live near farms using sewage sludge. Some of them say the
sludge makes them sick. The Great Lakes Radio Consortium’s Amy Tardif reports:
About three million dry tons of treated sewage – called sludge – is used to fertilize sod, pasture
land and even food crops every year in the United States. As cities sprawl and people move into
rural areas they discover the practice. And many don’t like it.
“We were like what is that smell? This is sick. It makes you want to vomit. Your eyes start
burning and you want to get away from it as quick as you can.”
Molly Bowen is one of a group of homeowners suing the haulers who dump and landowners who
use sewage sludge near their neighborhood. People around the country have blamed the sludge
for causing illnesses and even deaths. They say their wells are contaminated with sludge. They
say they breathe sludge dust blowing from recently treated fields. Bowen and her neighbors
blame the sludge for a lot of health problems.
“Laryngitis, stomach, upper respiratory, not being able to breath well.”
For a while these people thought no one was listening. But cases are coming in from all over and
the Environmental Protection Agency is starting to pay attention. In 2002, the EPA asked the
National Academy of Sciences to study the public health aspects of sludge. Thomas Burke is a
professor and epidemiologist with Johns Hopkins University Bloomberg School of Public Health.
He chaired the study.
“This is poop we’re talking about here. It has the potential to cause serious illness if they’re not treated
appropriately and if there is not appropriate protection of the population.”
Burke and others studied to see if the EPA methods used to determine the limits for chemicals,
viruses and bacteria in sewage sludge were strong enough. Burke says the methods are not strong
enough to use the sludge safely.
“We need to understand better the potential health effects. We need a new national survey to
understand the microbes and the potential pathogens that might be present. And also we need to
better characterize the chemicals that might be present in sludge. The current rules are based upon
work that was done back in the ’80’s.”
The EPA is looking at those concerns. It says it will try to determine if there are contaminants in
the sludge that could cause health problems.
Prior to the National Academies of Sciences report, government regulators, including the EPA,
sewer plant managers, and sludge haulers, insisted sludge was safe when applied according to
the rules.
Houston-based Synagro manages sludge biosolids for municipalities in 35 states. Vice President
for government relations, Bob O’dette says there’s been plenty of studies already.
“If I thought for a moment that this caused anybody any health problems, I wouldn’t be in the
industry. I formed my opinion on biosolids before I came into the private sector.”
Problems have been pointed out. But the Federal Office of Inspector General reported in 2002
that the EPA offers virtually no federal oversight over sludge disposal and the agency is not
protecting the public. Those in the agency that tried to point out the problems were pressured or
fired.
Dr. David Lewis says he warned his bosses that using sludge might cause health problems. He
worked as a research microbiologist at the EPA’s national exposure research laboratory in
Georgia. He was fired last May. He alleges in whistleblower lawsuits that the EPA – which not
only regulates, but also promotes recycling sludge biosolids as fertilizer – wanted his sludge
research stopped.
“I can assure you that many of the issues raised by private citizens are issues that are raised and
that many scientists at EPA share those concerns and have from the beginning because of the
concerns over pathogens, metals and other contaminants in sludge and that concerns the risk that
might be present for public health and the environment.”
Lewis says although many viruses and bacteria die in the field, especially when exposed to
sunlight, the biggest risk of infection comes from what grows in the sludge after it’s put down.
Bacterial pathogens grow when the organic matter decomposes. He says it’s just like meat that’s
cooked and then left out on the counter. Some nasty stuff can start growing.
But now the EPA indicates it is ready to make changes. It plans to spend nearly six-million
dollars over the next three years following some of the advice of the National Academy of
Science study. Geff Grubbs is the EPA’s director of science and technology.
“We’re looking at what are the possible impacts and risks to people who live near and would
otherwise be exposed to pollutants that are emitted into the air from biosolids as they’re applied
to land. We’ll be conducting an analysis of samples of biosolids from various points across the
country to help determine the concentrations of additional pollutants that could impact health.”
The EPA says it will first look at health studies of people who claim to have become sick from
exposure to sludge. And it hopes to work with the Centers for Disease Control and state health
departments to arrange for them to track and investigate alleged cases of sludge sickness.
Environmentalists and others say they hope this is a more science-based look at the issue, but
they remain skeptical.
For the Great Lakes Radio Consortium, I’m Amy Tardif.
Much of the debate over preventing the West Nile virus has focused on when and how to use pesticides to get rid of the mosquitoes that transmit the disease. But one community is trying another approach: increasing stocks of mosquito-eating fish. The Great Lakes Radio Consortium’s Lisa Phillips reports:
Transcript
Much of the debate over preventing the West Nile virus has focused on when and how to use
pesticides to get rid of the mosquitoes that transmit the disease. But one community is trying
another approach – increasing stocks of mosquito-eating fish. The Great Lakes Radio
Consortium’s Lisa Phillips reports:
When Greg Wier was a kid, he spent hours playing in the woods next to his family’s vegetable
farm in Guilderland, New York. He was too busy having fun to pay much attention to
mosquitoes.
“You got woods, you’re a kid. We had trails and forts and everything back here.”
Wier, who now has kids of his own, still lives on the family farm. But a lot has changed. The
woods have been replaced by a subdivision. The mosquitoes he once thought fairly harmless are
now potential carriers of the sometimes-deadly West Nile virus. Wier, the town highway
foreman, is the man in charge of Guilderland’s latest effort to combat the disease. He’s taking a
different approach: stocking ponds with fish that eat mosquito larvae. The effort started in the
subdivision’s drainage pond. On this hot afternoon, Wier watches a few sunfish and tadpoles dart
around the pond’s edge:
“I grew up here. I know this area quite well, and to see something like this happening naturally
instead of chemically is good for me.”
For the past four years, Wier has stocked the pond with several native fish species, including
pumpkin seed sunfish and golden shiner, a type of minnow. Both have a healthy appetite for
mosquito larvae. The town also puts bacterial larvicides, known as “dunks,” in smaller pools of
water, but there has been no pesticide spraying since the 1980’s. Ward Stone heads the Wildlife
Pathology Unit of the New York State Department of Environmental Conservation. He is a big
fan of the Guilderland approach, especially as evidence of West Nile mounts:
“We’re in high danger right now. We’ve had mosquitoes, we’ve had a wet summer. Predictions
are that the United States will have the most severe year for West Nile virus. We need to have a
vaccine and control. This is a little bit of that overall war that the town of Guilderland is waging
and doing it very soundly and ecologically.”
Using fish to fight mosquitoes is not a new idea. But using native fish is different from what’s
been done in the past. Michael Kaufman is an entomologist at Michigan State University. He
says gambusia, a non-native species known as “mosquito fish,” has been used in the American
West and parts of Asia.
“Lots of people, myself included, think it is an unwise idea to use them indiscriminately. There is
an issue with mosquito fish eating the eggs of native species or amphibians. They’ll eat frogs or
salamander eggs. That’s obviously a sensitive issue there, too.”
Guilderland has taken no official steps to research how well the program is working, though there
have been fewer complaints about mosquitoes in the neighborhood near the drainage pond. The
question is whether other communities should follow the town’s lead. Entomologist Michael
Kaufman says there are benefits to doing so – but there are also limits.
“Anything a community can do to reduce mosquitoes coming off any breeding site is a good
thing. The problem is, many mosquitoes don’t breed in ponds that are permanent. There are a
large number of mosquitoes that breed in smaller bodies of water, temporary ponds, very polluted
areas. Things like sewage lagoons.”
In other words, places mosquito-eating native fish are unlikely to thrive. Guilderland Highway
Foreman Greg Wier is well aware that his strategy is no magic bullet against West Nile virus. He
just sees it as one part of an effort everyone has to make.
“By a town taking care of a pond like this, we’re taking care of our own backyard. If everyone else
takes care of their own backyard, cleans the gutters, birdbaths, or empties a tire, that alone will
help control the mosquito population. If every house in the area does it that will be more of an
answer to West Nile virus, I believe.”
Because the fish program is so cheap to implement, Wier has already expanded it to a pond in a
new town park. If all goes well, in a few years there could be another benefit to Guilderland’s
mosquito prevention scheme: a place for anglers to go fishing – perhaps without having to cover
themselves with quite so much bug repellant.
For the Great Lakes Radio Consortium, I’m Lisa Phillips.
With the rapid spread of West Nile, more communities are faced with the question of whether to use pesticides to control mosquitoes, which carry the virus. One town is trying a new approach: fish. The Great Lakes Radio Consortium’s Lisa Phillips reports:
Transcript
With the rapid spread of West Nile, more communities are faced with the question of whether to
use pesticides to control mosquitoes, which carry the virus. One town is trying a new approach –
fish. The Great Lakes Radio Consortium’s Lisa Phillips reports:
Non-native “mosquito fish,” also known as gambusia, have been used for years as a weapon
against the insect in parts of Asia and the American West. One town in upstate New York,
Guilderland, is trying something a little different: stocking a town pond with native species such
as sunfish and golden shiner.
Ward Stone is New York State’s Wildlife Pathologist. He says more communities should
consider doing the same.
“West Nile’s going to be around, and by lowering the mosquito population it makes it a little bit
safer. And they’re not applying any pesticides to it. We should encourage that.”
Stone says the fish program is limited because mosquitoes often breed in pools of water too small
for fish. But complaints about mosquitoes have decreased in the neighborhood near the pond,
and the town has decided to expand the program.
For the Great Lakes Radio Consortium, I’m Lisa Phillips.
Scientists are comparing the effects of West Nile virus to Polio, because they share similar symptoms. The Great Lakes Radio Consortium’s Jenny Lawton has more:
Transcript
Scientists are comparing the effects West Nile Virus to Polio because they share
similar
symptoms. The Great Lakes Radio Consortium’s Jenny Lawton has more:
Researchers say both the West Nile virus and Polio can live in the body for years
before
launching an attack against the nervous system. And there’s evidence both can lead
to other
medical problems years after the initial illness.
In the case of polio, this delay is known as “PPS,” or “post polio syndrome.”
Science journalist, Janet Ginsburg, says those kinds of outbreaks begin with a range
of symptoms.
“And a lot of people had a flu-like illness, just like West Nile fever. These
people today are
showing up with PPS. So you have this model of polio.”
Ginsberg says more research needs to be done before a connection is certain.
There have been fewer than a couple of dozen cases of the West Nile virus in the
Great Lakes
States so far this year.
For the Great Lakes Radio Consortium, I’m Jenny Lawton.
Dr. Robert McLean works on a West Nile disease project at the National WIldlife Health Center with a Carolina Chickadee (Photo courtesy of the US Fish and Wildlife Service)
