Health
What to know about the FDA's paralytic shellfish poisoning warning
- The U.S. Food and Drug Administration says consumers should avoid eating shellfish from Oregon and Washington state as they may be contaminated with toxins that cause paralytic shellfish poisoning.
- Oregon and Washington have prohibited shellfish harvesting on their coastlines, but shellfish have already been distributed across the country.
- At least 31 people have been sickened by paralytic shellfish poisoning so far.
The U.S. Food and Drug Administration says consumers should avoid eating shellfish from Oregon and Washington state as they may be contaminated with toxins that cause paralytic shellfish poisoning. At least 31 people have been sickened in Oregon so far, according to state health officials. Here’s what to know about the federal agency’s advisory.
What did the FDA say about shellfish?
The warning says to avoid oysters and bay clams harvested from Netarts and Tillamook bays in northern Oregon since May 28, as well as shellfish harvested from areas around Willapa Bay in southern Washington since May 26. They may be contaminated with high levels of paralytic shellfish poisoning, or PSP, a naturally occurring toxin produced by algae.
Shellfish harvested from those areas during that period were distributed beyond Oregon and Washington to Arizona, California, Colorado, Hawaii, Nevada, New York. The FDA has warned restaurants and retailers in those states not to serve it.
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What do we know about the shellfish poisoning outbreak so far?
Elevated levels of toxins were first detected in shellfish on the Oregon coast on May 17, state fish and wildlife officials said.
Since then, a paralytic shellfish poisoning outbreak has sickened at least 31 people in Oregon, according to the Oregon Health Authority. The agency has asked people who have harvested or eaten Oregon shellfish since May 13 to fill out a survey intended to help investigators identify the cause of the outbreak and the number of people sickened.
Oregon authorities have closed the state’s entire coastline to the harvesting of mussels, razor clams and bay clams. Agriculture officials have also closed three bays, including those named in the FDA advisory, to commercial oyster harvesting.
Grasses and yearling oysters, growing on the large “mother” shells planted throughout the bed, are seen at low tide on May 1, 2015, in Willapa Bay near Tokeland, Washington. The FDA says consumers should avoid shellfish from Oregon and Washington state as they may be contaminated with toxins that cause paralytic shellfish poisoning. (AP Photo/Elaine Thompson, File)
Officials in neighboring Washington have also closed the state’s Pacific coastline to the harvesting of shellfish, including mussels, clams, scallops and oysters, a a shellfish safety map produced by the Washington State Department of Health shows.
What is paralytic shellfish poisoning?
Paralytic shellfish poisoning, or PSP, is caused by saxitoxin, a naturally occurring toxin that’s produced by algae. Saxitoxin is a neurotoxin, meaning it can damage nerve tissue.
People who eat shellfish contaminated with high levels of saxitoxins usually start feeling ill within 30 to 60 minutes, according to Oregon health officials. Symptoms include numbness of the mouth and lips, vomiting, diarrhea, shortness of breath and irregular heartbeat in severe cases.
There is no antidote to PSP, according to the health agency. Treatment for severe cases may require mechanical ventilators to help with breathing.
Authorities warn that cooking or freezing contaminated shellfish doesn’t kill the toxins or make it safe to eat.
What causes paralytic shellfish poisoning?
A “very large” algal bloom has resulted in “unprecedented levels” of PSP toxins along Oregon’s coast, Matthew Hunter, shellfish program manager for the Oregon Department of Fish and Wildlife, said during a briefing.
The toxins have accumulated in the shellfish, sickening some people who have eaten them.
While the factors that create harmful algal blooms are not well understood, certain factors — resulting from both natural processes and human activities — are believed to play a role, according to the National Oceanic and Atmospheric Administration.
“Studies show that many algal species flourish when wind and water currents are favorable,” the agency says on a webpage dedicated to explaining harmful algal blooms. Some blooms, it says, stem from “sluggish water circulation, unusually high water temperatures, and extreme weather events like hurricanes, floods, and drought.”
Algae growth can also increase when nutrients used in fertilizers, mainly phosphorus and nitrogen, flow into bodies of water, according to the agency.
How long will shellfish be unsafe to eat?
Oregon officials said it may take weeks, months or even up to a year for toxin levels to subside, depending on the type of shellfish.
Mussels can accumulate paralytic shellfish poison rapidly, but also rid themselves of it quickly, according to Hunter, the Oregon fish and wildlife official. Because of this, it may take anywhere from two weeks to a month for mussels to eliminate the toxin.
Razor clams, however, are slower to do so. It may take them several months to a year to cleanse themselves due to the current high levels of toxin, Hunter said.
How common is paralytic shellfish poisoning?
Such high levels of paralytic shellfish poison haven’t been detected in Oregon in decades, according to Hunter, who cited a previous shellfish harvesting closure in the state in 1992.
However, PSP has been prevalent in the regional waters for centuries, he said.
What’s the economic impact of the outbreak?
The harvesting closures may deal a blow to Pacific Northwest fisheries.
The shellfish industry generates $270 million each year for the region’s economy, according to the National Oceanic and Atmospheric Administration, and employs some 3,200 people.
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A new report by the American Heart Association (AHA) included some troubling predictions for the future of women’s health.
The forecast, published in the journal Circulation on Wednesday, projected increases in various comorbidities in American females by 2050.
More than 59% of women were predicted to have high blood pressure, up from less than 49% currently.
The review also projected that more than 25% of women will have diabetes, compared to about 15% today, and more than 61% will have obesity, compared to 44% currently.
As a result of these risk factors, the prevalence of cardiovascular disease and stroke is expected to rise to 14.4% from 10.7%.
The prevalence of cardiovascular disease and stroke in women is expected to rise to 14.4% from 10.7% by 2050. (iStock)
Not all trends were negative, as unhealthy cholesterol prevalence is expected to drop to about 22% from more than 42% today, the report stated.
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Dr. Elizabeth Klodas, a cardiologist and founder of Step One Foods in Minnesota, commented on these “jarring findings.”
“The fact that on our current trajectory, cardiometabolic disease is projected to explode in women within one generation should be a huge wake-up call,” she told Fox News Digital.
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“Hypertension, diabetes, obesity — these are all major risk factors for heart disease, and we are already seeing what those risks are driving. Heart disease is the No. 1 killer of women, eclipsing all other causes of death, including breast cancer.”
Cardiovascular disease is the leading cause of death for women in the U.S. and around the world. (iStock)
Klodas warned that heart disease starts early, progresses “stealthily,” and can present “out of the blue in devastating ways.”
The AHA published another study on Thursday revealing one million hospitalizations, showing that heart attack deaths are climbing among adults below the age of 55.
The more alarming finding, according to Klodas, is that young women were found more likely to die after their first heart attack than men of the same age.
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“This is all especially tragic since heart disease is almost entirely preventable,” she said. “The earlier you start, the better.”
Children can show early evidence of plaque deposition in their arteries, which can be reversed through lifestyle changes if “undertaken early enough and aggressively enough,” according to the expert.
Moving more is one part of protecting a healthy heart, according to experts. (iStock)
Klodas suggested that rising heart conditions are associated with traditional risk factors, like smoking, high blood pressure, high cholesterol, diabetes, obesity and a sedentary lifestyle.
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Doctors are also seeing higher rates of preeclampsia, or high blood pressure during pregnancy, as well as gestational diabetes. Klodas noted that these are sex-specific risk factors that don’t typically contribute to complications until after menopause.
The best way to protect a healthy heart is to “do the basics,” Klodas recommended, including the following lifestyle habits.
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Klodas especially emphasized making improvements to diet, as the food people eat affects “every single risk factor that the AHA’s report highlights.”
“High blood pressure, high blood sugar, high cholesterol, excess weight – these are all conditions that are driven in part or in whole by food,” she said. “We eat multiple times every single day, which means what we eat has profound cumulative effects over time.”
“Even a small improvement in dietary intake, when maintained, can have a massive positive impact on health,” a doctor said. (iStock)
“Even a small improvement in dietary intake, when maintained, can have a massive positive impact on health.”
The doctor also recommends changing out a few snacks per day for healthier choices, which has been proven to “yield medication-level cholesterol reductions” in a month.
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“Keep up that small change and, over the course of a year, you could also lose 20 pounds and reduce your sodium intake enough to avoid blood pressure-lowering medications,” Klodas added.
“Women should not view the AHA report as inevitable. We have power over our health destinies. We just need to use it.”
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Nearsightedness (myopia) is skyrocketing globally, with nearly half of the world’s population expected to be myopic by 2050, according to the World Health Organization.
Heavy use of smartphones and other devices is associated with an 80% higher risk of myopia when combined with excessive computer use, but a new study suggests that dim indoor lighting could also be a factor.
For years, scientists have been puzzled by the different ways myopia is triggered. In lab settings, it can be induced by blurring vision or using different lenses. Conversely, it can be slowed by something as simple as spending time outdoors, research suggests.
Nearsightedness occurs when the eyeball grows too long from front to back, according to the American Optometric Association (AOA). This physical elongation causes light to focus in front of the retina rather than directly on it, making distant objects appear blurry.
The study suggests that myopia isn’t caused by the digital devices themselves, but by the low-light environments where they are typically used. (iStock)
Researchers at the State University of New York (SUNY) College of Optometry identified a potential specific trigger for this growth. When someone looks at a phone or a book up close, the pupil naturally constricts.
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“In bright outdoor light, the pupil constricts to protect the eye while still allowing ample light to reach the retina,” Urusha Maharjan, a SUNY Optometry doctoral student who conducted the study, said in a press release.
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“When people focus on close objects indoors, such as phones, tablets or books, the pupil can also constrict — not because of brightness, but to sharpen the image,” she went on. “In dim lighting, this combination may significantly reduce retinal illumination.”
High-intensity natural light prevents myopia because it provides enough retinal stimulation to override the “stop growing” signal, even when pupils are constricted. (iStock)
The hypothesis suggests that when the retina is deprived of light during extended close-up work, it sends a signal for the eye to grow.
In a dim environment, the narrowed pupil allows so little light through that the retinal activity isn’t strong enough to signal the eye to stop growing, the researchers found.
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In contrast, being outdoors provides light levels much brighter than indoors. This ensures that even when the pupil narrows to focus on a nearby object, the retina still receives a strong signal, maintaining healthy eye development.
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The team noted some limitations of the study, including the small subject group and the inability to directly measure internal lens changes, as the bright backgrounds used to mimic the outdoors made pupils too small for standard equipment.
Researchers believe that increasing indoor brightness during close-up work could be a simple, testable way to slow the global nearsightedness epidemic. (iStock)
“This is not a final answer,” Jose-Manuel Alonso, MD, PhD, SUNY distinguished professor and senior author of the study, said in the release.
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“But the study offers a testable hypothesis that reframes how visual habits, lighting and eye focusing interact.”
The study was published in the journal Cell Reports.
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