Lyme Epidemic Spreads Worse Than Ever
By Clara Chaisson
In the summer of 2013, I was changing into pajamas when an irritated blotch of skin caught my eye. My rib cage looked like a miniature advertisement for Target: There was a near-perfect circle of red, a smaller, concentric ring of clear skin, and then a red dot right in the middle. Bull's-eye.
In medical jargon this distinctive rash is called erythema migrans, and it's the calling card of Lyme disease. Fittingly enough, I was spending this particular peak tick season in Old Lyme, Connecticut—where it was first discovered in 1975. Luckily, I knew to be on the lookout for this exact symptom, and a course of antibiotics knocked it out of my system. I experienced no further problems.
But cases of Lyme disease aren't always so straightforward. According to the Centers for Disease Control and Prevention (CDC), somewhere around a quarter of infected people never get the bull's-eye rash, and other early signs, like headache and fatigue, can be easy to misinterpret. If Lyme progresses untreated, it can spread to the joints, heart and nervous system, sometimes triggering problems like meningitis, arrhythmias, or Bell's palsy. Later stages of the disease can cause symptoms that are more difficult to treat, like arthritis and memory loss.
Worryingly, more and more people are experiencing Lyme's ravages as environmental conditions help Borrelia burgdorferi, the disease-causing bacterium carried by ticks, spread into new areas.
"It's a huge problem, it's growing, and we really are concerned about the lack of prevention tools that are available," said C. Ben Beard, deputy director of the CDC's Division of Vector-Borne Diseases.
Unlike the tiny ticks that carry the troublesome bacteria, Lyme's rise is easy to spot in the CDC's incidence maps from the past couple of decades. Since the early 1990s, the annual number of officially reported cases of Lyme has tripled to 30,000, but studies suggest the actual number is 10 times higher than that. Climate change, suburban land development, and habitat change are creating conditions that not only allow the ticks to thrive, but also put more people into contact with them and their harpoon-like mouthparts.
Black-legged ticks (also known as deer ticks) feed exclusively on blood and need three meals over a two-year period to complete the four stages of their life cycle; otherwise, they starve to death (good riddance). As winters warm, milder seasons are giving the bloodsuckers a larger window of opportunity to find hosts to dine on, allowing them to survive in greater numbers. Meanwhile, higher temperatures are enabling the ticks to spread to parts of the map that have historically been too cold to sustain them. (These arachnids also depend on a high baseline of relative humidity, which explains why residents of drier regions of the country don't have to worry about the disease.)
A black-legged tick's four stages lifePamela Freeman
Climate change isn't the only thing humans are causing to make the environment more hospitable to these parasites. Forest fragmentation is giving a boost to populations of white-footed mice, the primary carriers of B. burgdorferi, and suburbanization puts humans into closer contact with these and other tick-hosting wildlife like chipmunks and deer.
Almost half of all U.S. counties reported the presence of black-legged ticks as of 2015, up 45 percent from 1996. Still, Lyme is mostly a regional threat—95 percent of confirmed cases occur in just 14 states in the Northeast and upper Midwest. And within those states, Lyme is sickening more and more people. The upsurge is especially pronounced in the Northeast, where the number of counties with high incidence of the disease increased 320 percent between 1993 and 2012.
As Lyme moves into new communities, residents often don't know how to protect themselves, and local doctors aren't always familiar with the symptoms and best treatment practices. On top of that, bad advice on how to treat Lyme is swirling around on the Internet. According to one study, more than 30 untested alternative therapies are marketed to Lyme sufferers online, including drinking urine, sleeping on a bed of 70 magnets, and blowing gaseous ozone into the rectum. Yup. (Just to be crystal clear: Do not try any of this at home ... or anywhere else.)
"The misinformation persists at almost all levels of the Lyme epidemic," said Richard Ostfeld, a disease ecologist at the Cary Institute of Ecosystem Studies.
Richard Ostfeld tags a white-footed mouse as part of field research on the ecology of Lyme disease.Pamela Freeman
Combine inadequate prevention with serious—but sometimes enigmatic—symptoms, widespread misinformation, and a steady creep into new areas, and you've got a recipe for a population increasingly vulnerable to a Lyme epidemic. "I would characterize our preparedness as very poor," said Ostfeld. "And that needs to be rectified."
So, what can be done? A lot, actually. Beard said the CDC is working to educate health care providers in Lyme-prone areas on how to recognize the symptoms. The National Institutes of Health is also supporting research into more rapid diagnostic tests. The current approach detects antibodies that the immune system produces in response to the bacteria, but the antibodies can take a few weeks to show up.
Ostfeld thinks diagnosing Lyme will remain difficult for some time, and avoiding infections in the first place through tick checks, proper clothing, and potential vaccines may still be the best strategy. "What if we lived in a world in which [diagnosis] was less important because we were preventing so many potential cases of tick-borne disease?" he asked.
Last summer, the FDA fast-tracked the approval process for VLA15, a potentially safe and effective Lyme disease vaccine. (A pharmaceutical company discontinued an earlier vaccine, introduced in 1998, after some recipients claimed it gave them arthritis. Clinical data did not support these claims; the same vaccine is now used to protect dogs from the disease.)
Ostfeld, along with his research partner and wife, Bard College ecologist Felicia Keesing, is leading the Tick Project, a five-year study to see if environmental interventions can protect communities from Lyme disease. A thousand households (and their pets) in 24 neighborhoods in Dutchess County, New York, have signed up to participate. The researchers began deploying two tick control methods last summer: bait boxes that apply a small dose of fipronil—the main ingredient in Frontline—to small animals like chipmunks and mice, and a fungal spray that kills ticks. Over the next few years, they hope to find out whether these methods can effectively lessen a neighborhood's exposure to Lyme.
On a larger scale, it will be critical to curb climate change and the other forces that drive Lyme disease and other vector-borne illnesses, like the Zika virus and malaria, into new areas.
"We absolutely need to be pushing our leaders at all levels of government to cut carbon pollution," said Juanita Constible, senior advocate for climate and health for NRDC's Climate and Clear Energy program. "We're setting up the backdrop for ticks to take over parts of the country where they never were before."
Constible speaks from the heart. She lives in Loudoun County, Virginia, a Lyme hot spot, and has had the disease three times in the past six years. And though she has made a full recovery after each bout with Lyme, the experiences have left their mark on her work. "It makes it a lot more deeply personal for me, and it heightens the urgency to do something about climate change," she said. "I certainly don't want my friends and family and coworkers to face this."
Climate Change Harms Human Health https://t.co/ChUuuQVVOD @NRDC @YEARSofLIVING @greenpeaceusa @billmckibben @CleanAirMoms— EcoWatch (@EcoWatch)1521049045.0
- The best of EcoWatch, right in your inbox! - EcoWatch ›
- 3 Ways Climate Change Affects Our Health Today ›
By Dana M Bergstrom, Euan Ritchie, Lesley Hughes and Michael Depledge
In 1992, 1,700 scientists warned that human beings and the natural world were "on a collision course." Seventeen years later, scientists described planetary boundaries within which humans and other life could have a "safe space to operate." These are environmental thresholds, such as the amount of carbon dioxide in the atmosphere and changes in land use.
The Good and Bad News<p><span>Ecosystems consist of living and non-living components, and their interactions. They work like a super-complex engine: when some components are removed or stop working, knock-on consequences can lead to system failure.</span></p><p>Our study is based on measured data and observations, not modeling or predictions for the future. Encouragingly, not all ecosystems we examined have collapsed across their entire range. We still have, for instance, some intact reefs on the Great Barrier Reef, especially in deeper waters. And northern Australia has some of the most intact and least-modified stretches of savanna woodlands on Earth.</p><p><span>Still, collapses are happening, including in regions critical for growing food. This includes the </span><a href="https://www.mdba.gov.au/importance-murray-darling-basin/where-basin" target="_blank" rel="noopener noreferrer">Murray-Darling Basin</a><span>, which covers around 14% of Australia's landmass. Its rivers and other freshwater systems support more than </span><a href="https://www.abs.gov.au/ausstats/[email protected]/latestproducts/94F2007584736094CA2574A50014B1B6?opendocument" target="_blank" rel="noopener noreferrer">30% of Australia's food</a><span> production.</span></p><p><span></span><span>The effects of floods, fires, heatwaves and storms do not stop at farm gates; they're felt equally in agricultural areas and natural ecosystems. We shouldn't forget how towns ran out of </span><a href="https://www.mdba.gov.au/issues-murray-darling-basin/drought#effects" target="_blank" rel="noopener noreferrer">drinking water</a><span> during the recent drought.</span></p><p><span></span><span>Drinking water is also at risk when ecosystems collapse in our water catchments. In Victoria, for example, the degradation of giant </span><a href="https://theconversation.com/logging-must-stop-in-melbournes-biggest-water-supply-catchment-106922" target="_blank" rel="noopener noreferrer">Mountain Ash forests</a><span> greatly reduces the amount of water flowing through the Thompson catchment, threatening nearly five million people's drinking water in Melbourne.</span></p><p>This is a dire <em data-redactor-tag="em">wake-up</em> call — not just a <em data-redactor-tag="em">warning</em>. Put bluntly, current changes across the continent, and their potential outcomes, pose an existential threat to our survival, and other life we share environments with.</p><p><span>In investigating patterns of collapse, we found most ecosystems experience multiple, concurrent pressures from both global climate change and regional human impacts (such as land clearing). Pressures are often </span><a href="https://besjournals.onlinelibrary.wiley.com/doi/abs/10.1111/1365-2664.13427" target="_blank" rel="noopener noreferrer">additive and extreme</a><span>.</span></p><p>Take the last 11 years in Western Australia as an example.</p><p>In the summer of 2010 and 2011, a <a href="https://theconversation.com/marine-heatwaves-are-getting-hotter-lasting-longer-and-doing-more-damage-95637" target="_blank" rel="noopener noreferrer">heatwave</a> spanning more than 300,000 square kilometers ravaged both marine and land ecosystems. The extreme heat devastated forests and woodlands, kelp forests, seagrass meadows and coral reefs. This catastrophe was followed by two cyclones.</p><p>A record-breaking, marine heatwave in late 2019 dealt a further blow. And another marine heatwave is predicted for <a href="https://www.theguardian.com/environment/2020/dec/24/wa-coastline-facing-marine-heatwave-in-early-2021-csiro-predicts" target="_blank" rel="noopener noreferrer">this April</a>.</p>
What to Do About It?<p><span>Our brains trust comprises 38 experts from 21 universities, CSIRO and the federal Department of Agriculture Water and Environment. Beyond quantifying and reporting more doom and gloom, we asked the question: what can be done?</span></p><p>We devised a simple but tractable scheme called the 3As:</p><ul><li>Awareness of what is important</li><li>Anticipation of what is coming down the line</li><li>Action to stop the pressures or deal with impacts.</li></ul><p>In our paper, we identify positive actions to help protect or restore ecosystems. Many are already happening. In some cases, ecosystems might be better left to recover by themselves, such as coral after a cyclone.</p><p>In other cases, active human intervention will be required – for example, placing artificial nesting boxes for Carnaby's black cockatoos in areas where old trees have been <a href="https://www.environment.gov.au/biodiversity/threatened/publications/factsheet-carnabys-black-cockatoo-calyptorhynchus-latirostris" target="_blank" rel="noopener noreferrer">removed</a>.</p><p><span>"Future-ready" actions are also vital. This includes reinstating </span><a href="https://www.abc.net.au/gardening/factsheets/a-burning-question-fire/12395700" target="_blank" rel="noopener noreferrer">cultural burning practices</a><span>, which have </span><a href="https://theconversation.com/australia-you-have-unfinished-business-its-time-to-let-our-fire-people-care-for-this-land-135196" target="_blank" rel="noopener noreferrer">multiple values and benefits for Aboriginal communities</a><span> and can help minimize the risk and strength of bushfires.</span></p><p>It might also include replanting banks along the Murray River with species better suited to <a href="https://www.abc.net.au/gardening/factsheets/my-garden-path---matt-hansen/12322978" target="_blank" rel="noopener noreferrer">warmer conditions</a>.</p><p>Some actions may be small and localized, but have substantial positive benefits.</p><p>For example, billions of migrating Bogong moths, the main summer food for critically endangered mountain pygmy possums, have not arrived in their typical numbers in Australian alpine regions in recent years. This was further exacerbated by the <a href="https://theconversation.com/six-million-hectares-of-threatened-species-habitat-up-in-smoke-129438" target="_blank" rel="noopener noreferrer">2019-20</a> fires. Brilliantly, <a href="https://www.zoo.org.au/" target="_blank" rel="noopener noreferrer">Zoos Victoria</a> anticipated this pressure and developed supplementary food — <a href="https://theconversation.com/looks-like-an-anzac-biscuit-tastes-like-a-protein-bar-bogong-bikkies-help-mountain-pygmy-possums-after-fire-131045" target="_blank" rel="noopener noreferrer">Bogong bikkies</a>.</p><p><span>Other more challenging, global or large-scale actions must address the </span><a href="https://www.youtube.com/watch?v=iICpI9H0GkU&t=34s" target="_blank" rel="noopener noreferrer">root cause of environmental threats</a><span>, such as </span><a href="https://www.nature.com/articles/s41559-018-0504-8" target="_blank" rel="noopener noreferrer">human population growth and per-capita consumption</a><span> of environmental resources.</span><br></p><p>We must rapidly reduce greenhouse gas emissions to net-zero, remove or suppress invasive species such as <a href="https://onlinelibrary.wiley.com/doi/abs/10.1111/mam.12080" target="_blank" rel="noopener noreferrer">feral cats</a> and <a href="https://theconversation.com/the-buffel-kerfuffle-how-one-species-quietly-destroys-native-wildlife-and-cultural-sites-in-arid-australia-149456" target="_blank" rel="noopener noreferrer">buffel grass</a>, and stop widespread <a href="https://theconversation.com/to-reduce-fire-risk-and-meet-climate-targets-over-300-scientists-call-for-stronger-land-clearing-laws-113172" target="_blank" rel="noopener noreferrer">land clearing</a> and other forms of habitat destruction.</p>
Our Lives Depend On It<p>The multiple ecosystem collapses we have documented in Australia are a harbinger for <a href="https://www.iucn.org/news/protected-areas/202102/natures-future-our-future-world-speaks" target="_blank">environments globally</a>.</p><p>The simplicity of the 3As is to show people <em>can</em> do something positive, either at the local level of a landcare group, or at the level of government departments and conservation agencies.</p><p>Our lives and those of our <a href="https://theconversation.com/children-are-our-future-and-the-planets-heres-how-you-can-teach-them-to-take-care-of-it-113759" target="_blank">children</a>, as well as our <a href="https://theconversation.com/taking-care-of-business-the-private-sector-is-waking-up-to-natures-value-153786" target="_blank" rel="noopener noreferrer">economies</a>, societies and <a href="https://theconversation.com/to-address-the-ecological-crisis-aboriginal-peoples-must-be-restored-as-custodians-of-country-108594" target="_blank" rel="noopener noreferrer">cultures</a>, depend on it.</p><p>We simply cannot afford any further delay.</p><p><em><a rel="noopener noreferrer" href="https://theconversation.com/profiles/dana-m-bergstrom-1008495" target="_blank" style="">Dana M Bergstrom</a> is a principal research scientist at the University of Wollongong. <a rel="noopener noreferrer" href="https://theconversation.com/profiles/euan-ritchie-735" target="_blank" style="">Euan Ritchie</a> is a professor in Wildlife Ecology and Conservation, Centre for Integrative Ecology, School of Life & Environmental Sciences at Deakin University. <a rel="noopener noreferrer" href="https://theconversation.com/profiles/lesley-hughes-5823" target="_blank">Lesley Hughes</a> is a professor at the Department of Biological Sciences at Macquarie University. <a rel="noopener noreferrer" href="https://theconversation.com/profiles/michael-depledge-114659" target="_blank">Michael Depledge</a> is a professor and chair, Environment and Human Health, at the University of Exeter. </em></p><p><em>Disclosure statements: Dana Bergstrom works for the Australian Antarctic Division and is a Visiting Fellow at the University of Wollongong. Her research including fieldwork on Macquarie Island and in Antarctica was supported by the Australian Antarctic Division.</em></p><p><em>Euan Ritchie receives funding from the Australian Research Council, The Australia and Pacific Science Foundation, Australian Geographic, Parks Victoria, Department of Environment, Land, Water and Planning, and the Bushfire and Natural Hazards CRC. Euan Ritchie is a Director (Media Working Group) of the Ecological Society of Australia, and a member of the Australian Mammal Society.</em></p><p><em>Lesley Hughes receives funding from the Australian Research Council. She is a Councillor with the Climate Council of Australia, a member of the Wentworth Group of Concerned Scientists and a Director of WWF-Australia.</em></p><p><em>Michael Depledge does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.</em></p><p><em>Reposted with permission from <a href="https://theconversation.com/existential-threat-to-our-survival-see-the-19-australian-ecosystems-already-collapsing-154077" target="_blank" style="">The Conversation</a>. </em></p>
- Coral Reef Tipping Point: 'Near-Annual' Bleaching May Occur ... ›
- Scientists Warn Humanity in Denial of Looming 'Collapse of ... ›
EcoWatch Daily Newsletter
To save the planet, we must save the Amazon rainforest. To save the rainforest, we must save its indigenous peoples. And to do that, we must demarcate their land.
A new EarthxTV film special calls for the protection of the Amazon rainforest and the indigenous people that call it home. EarthxTV.org
- Meet the 'Women Warriors' Protecting the Amazon Forest - EcoWatch ›
- Indigenous Tribes Are Using Drones to Protect the Amazon ... ›
- Amazon Rainforest Will Collapse by 2064, New Study Predicts ... ›
- Deforestation in Amazon Skyrockets to 12-Year High Under Bolsonaro ›
- Amazon Rainforest on the Brink of Turning Into a Net Carbon Emitter ... ›
By Anke Rasper
"Today's interim report from the UNFCCC is a red alert for our planet," said UN Secretary General Antonio Guterres.
The report, released Friday, looks at the national climate efforts of 75 states that have already submitted their updated "nationally determined contributions," or NDCs. The countries included in the report are responsible for about 30% of the world's global greenhouse gas emissions.
- World Leaders Fall Short of Meeting Paris Agreement Goal - EcoWatch ›
- UN Climate Change Conference COP26 Delayed to November ... ›
- 5 Years After Paris: How Countries' Climate Policies Match up to ... ›
- Biden Win Puts World 'Within Striking Distance' of 1.5 C Paris Goal ... ›
- Biden Reaffirms Commitment to Rejoining Paris Agreement ... ›
India's New Delhi has been called the "world air pollution capital" for its high concentrations of particulate matter that make it harder for its residents to breathe and see. But one thing has puzzled scientists, according to The Guardian. Why does New Delhi see more blinding smogs than other polluted Asian cities, such as Beijing?
- This Indian Startup Turns Polluted Air Into Climate-Friendly Tiles ... ›
- How to Win the Fight Against Plastic - EcoWatch ›
In a historic move, the Delaware River Basin Commission (DRBC) voted Thursday to ban hydraulic fracking in the region. The ban was supported by all four basin states — New Jersey, Delaware, Pennsylvania and New York — putting a permanent end to hydraulic fracking for natural gas along the 13,539-square-mile basin, The Philadelphia Inquirer reported.
- Appalachian Fracking Boom Was a Jobs Bust, Finds New Report ... ›
- Long-Awaited EPA Study Says Fracking Pollutes Drinking Water ... ›
- Pennsylvania Fracking Water Contamination Much Higher Than ... ›