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We give you many useful information about health

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We give you many useful information about health

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Kamis, 13 Oktober 2011

Not safe to eat: Three foods to avoid

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The warm, moist environment necessary for growing sprouts provides the perfect conditions for bacteria to multiply.The warm, moist environment necessary for growing sprouts provides the perfect conditions for bacteria to multiply.Pasteurization is the only effective way of killing harmful bacteria in milkThere have been 30 reported outbreaks of foodborne illness from sproutsEating raw shellfish from the Gulf of Mexico is particularly dicey

(Health.com) -- Recent headlines about contaminated foods, from peanut butter and salad to turkey and eggs, are enough to make even the most intrepid eater a little bit paranoid.

But before you commit to a life of vitamins and astronaut ice cream, take comfort in the fact that you'll likely be OK eating as you always have: "We have a very safe food system," says Shelley Feist, executive director of the Partnership for Food Safety Education.

There are only three foods so risky that you should avoid them altogether. Here's the red-light list:

Raw milk

Fans of raw milk (meaning milk that hasn't been pasteurized or homogenized) credit it with having more beneficial bacteria and enzymes than its processed counterpart, but science hasn't proven any of these claims. And raw milk can become contaminated in a number of ways: by coming into contact with cow feces or bacteria living on the skin of cows, from an infection of the cow's udder, or from dirty equipment, among others.

The special heating process we know as pasteurization is the only effective way of killing most, if not all, harmful bacteria -- which can include listeria, salmonella, and E. coli.

Health.com: 10 types of food that can make you sick

According to the Centers for Disease Control (CDC), there were 86 reported food poisoning outbreaks from raw milk between 1998 and 2008, resulting in 1,676 illnesses, 191 hospitalizations, and two deaths.

Raw milk is responsible for nearly three times more hospitalizations than any other foodborne disease outbreak, says Hannah Gould, Ph.D., senior epidemiologist with the CDC's Enteric Diseases Epidemiology Branch.

It's no wonder selling raw milk to consumers is illegal in about half of U.S. states.

"We have two people, in California and Pennsylvania, who developed Guillain-Barré syndrome [which can cause paralysis and respiratory failure] after contracting a bacterial infection called campylobacteriosis from drinking raw milk," says John Sheehan, head of dairy safety at the U.S. Food and Drug Administration (FDA). "These were healthy, active people who came down with debilitating, lifelong diseases."

Health.com: How to practice food safety in your home kitchen

Raw sprouts

When sprouts were identified as the culprit in the food poisoning outbreak that killed at least 50 people in Europe this past summer, you probably wondered: What could be so bad about innocent, vegan-friendly sprouts?

But food-safety experts weren't surprised. According to the CDC, there have been at least 30 reported outbreaks of foodborne illness in the U.S. from raw or lightly cooked sprouts since 1996. All types of sprouts -- from the alfalfas you get on a sandwich to the mung bean sprouts garnishing your Thai food -- can be dangerous when not thoroughly cooked.

This is largely because of how they're grown, explains Michelle Smith, Ph.D., senior policy analyst at the FDA: The warm, moist environment necessary for growing sprouts provides the perfect conditions for bacteria (such as salmonella or E. coli) to multiply.

Health.com: How can you tell if food poisoning is harmless, or life-threatening?

Ask for restaurant and take-out meals to be sprout-free, since you can't know how well they've been cooked. And if you just can't live without sprouts, try getting used to giving them a hot bath before you eat them: Research has shown that you can kill salmonella by immersing contaminated sprouts in boiling water for five seconds.

Raw oysters from the Gulf of Mexico

Everyone knows that eating raw shellfish can be dicey (and in fact the CDC advises against it entirely), but bivalves from the Gulf of Mexico take it to a whole new level. Waters in the Gulf are warmer than those in the Pacific Northwest and other popular oystering spots, making it possible for a bacterium called Vibrio vulnificus to thrive.

"Oysters are filter feeders, which means they concentrate any contaminants in the water," explains William E. Keene, Ph.D., a senior epidemiologist at the Oregon Public Health Division. "A number of toxins can get into an oyster, but none are remotely as bad as Vibrio vulnificus."

Health.com: 10 states where rare and exotic diseases lurk

Healthy people who ingest a V. vulnificus--ridden oyster might have vomiting, diarrhea, and abdominal pain, but for anyone with a compromised immune system, the bug can infiltrate the bloodstream, causing a severe and life-threatening illness called septicemia, which is fatal in one-third of cases. And while having a pre-existing medical condition puts you at particular risk, "anyone at all can get horrifically sick," Keene says.

The good news is that several big seafood purchasers, like Legal Sea Foods and Costco, require that Gulf oysters be pasteurized before being served, as does the state of California -- so in these places the risk is far lower.

Pasteurized or not, "the simplest tactic here is to avoid raw Gulf oysters altogether," says Sarah Klein, staff attorney at the Center for Science in the Public Interest. That can go a long way toward keeping you safer.

Copyright Health Magazine 2010



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Jumat, 07 Oktober 2011

Three Scientists Win Nobel Prize In Physics

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T.S. Eliot wrote in a poem that the world will end not with a bang but a whimper. He was spot on. The Nobel Prize for physics will go to three scientists who discovered that, after the Big Bang, the universe has been expanding at an accelerating rate.

Copyright © 2011 National Public Radio®. For personal, noncommercial use only. See Terms of Use. For other uses, prior permission required.

GUY RAZ, host: It's ALL THINGS CONSIDERED from NPR News. I'm Guy Raz.

MELISSA BLOCK, host: And I'm Melissa Block.

As T.S. Eliot put it in his poem, "The Hollow Men," the world ends not with a bang but a whimper. He was spot on. This year's Nobel Prize in physics goes to three scientists who discovered that the universe will not only end with a whimper, but with a rather perplexing one.

NPR's Richard Harris has our story.

RICHARD HARRIS: Scientists know how the universe got started. First came the Big Bang, which created matter, and that stuff has been spreading out for more than 13 billion years. As it cruises outward the distances between all the galaxies keep getting bigger and bigger.

Dr. SAUL PERLMUTTER: But we'd always thought that gravity would be slowing that expansion.

HARRIS: Saul Perlmutter, at the Lawrence Berkeley Lab, wanted to find out just how much gravity was actually putting the brakes on our expanding universe.

PERLMUTTER: We didn't know whether there was enough stuff in the universe to slow it to the point that it would come to a halt and perhaps someday collapse.

HARRIS: So in the 1980s, Perlmutter set out to figure out whether the universe would collapse and end with the bang, or just keep expanding forever and end with a whimper. He did that by seeking out distant supernovas, exploding stars, to see what the universe was doing billions of years ago. And finally, after 10 years of searching, Perlmutter came up with an answer so bizarre he wasn't at first sure whether to believe it.

PERLMUTTER: We thought we were finding out how much the universe was slowing down, and whether it was slowing down enough to come to a halt. And, of course, the answer was that it's not slowing down enough to come to a halt. In fact, it's not slowing down at all. It's speeding up.

HARRIS: Speeding up - how could that be? Matter in the universe was supposed to be coasting since the Big Bang, but not so. Somehow or other it was picking up speed, accelerating.

PERLMUTTER: And this was, of course, a big shock.

HARRIS: Borderline unbelievable, but as luck would have it, Perlmutter and his colleagues weren't the only team probing this question. A second team was also on the case, including Adam Riess, now at Johns Hopkins University, and Brian Schmidt, an American, now working in Australia.

ROBERT KIRSCHNER: Well, these are my children.

(SOUNDBITE OF LAUGHTER)

HARRIS: Robert Kirshner at Harvard is speaking here in terms of his academic progeny.

KIRSCHNER: Brian Schmidt and Adam Riess were both graduates students with me, working on supernovae and working on using supernovae to measure cosmic distances.

HARRIS: And, as Kirschner tells a story, one day Schmidt came to him and said he wanted to track down distant supernova and try to answer the same kinds of question that Saul Perlmutter's team was after. He would need to write new software to pick through telescope images and identify those rare supernovas.

KIRSCHNER: And I said, well, these other guys have been working on it for five years - three people - that's 15 years. He said yeah, yeah, I could do it in a month. So...

(SOUNDBITE OF LAUGHTER)

KIRSCHNER: He did, too. It was terrible software. It had crashed all the time and, you know, gave false results some of the time. But he really did whip it together very quickly.

HARRIS: And it really did work. After a time, Adam Riess moved on to U.C. Berkeley to continue this work. And Schmidt stayed at Harvard through most of the next few exciting years, racing with Perlmutter to determine the fate of the universe. In the end, this team also came up with the same odd result at about the same time - namely that the universe will not only and in a whimper, but the expansion toward that ultimate demise is picking up speed as it goes.

Something weird is at work here driving that acceleration. Exactly what this is nobody can say, but they call it dark energy. And Kirschner says it seemingly makes up 75 percent of the universe.

KIRSCHNER: The simplest kind of dark energy would be everywhere. And so that means it would be present here on the earth. If we could figure out a smart way to detect its presence in a physics laboratory, that would be fantastic.

HARRIS: But nobody knows how to do that for now. So astronomers are hoping to gain more clues about it by looking out more into the universe.

And, as for the Nobel Prize, the rules say it gets split at most three ways, no matter what. So the committee doled it out to three of the deserving principles in this story: Perlmutter, Riess and Schmidt.

Richard Harris, NPR News.

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Senin, 03 Oktober 2011

Three Scientists Share Nobel Medicine Prize

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Minggu, 11 September 2011

HEALTH MANAGEMENT. Listeria Outbreak probe expands to three States

By Keith Coffman
DENVER | September 9, 2011 7: 16 pm EDT
DENVER (Reuters) - has expanded an investigation into a Listeria outbreak has killed at least one person with three States where was consumed potentially contaminated cantaloupe, Colorado health officials said on Friday.
The Colorado Department of public health and the environment, said in a release that the all patients recently melon ate nine confirmed cases of the gastric infection in Colorado, two suspected cases in Texas and Nebraska.
Chris Urbina, medical Chief for the Department said that officials still pursued still not, where the tainted were sold melons.
"While the investigation continues the cooker of the listeria, it is advisable for people at high risk for Listeria infection to consume of melon," URBINA said in a written statement.
At the age of 60, pregnant women and people, whose Immunsystem have weakened by disease or organ transplantation, are the most likely of the bacteria become ill URBINA said.
Because of the outbreak is gone-State, the US Centers for disease control and prevention coordinated the investigation in conjunction with the U.S. food and drug administration and the U.S. Department of agriculture.
Although Colorado has reported since early August 13 cases of Listeria associated the State to the current outbreak only nine cases.
In four other cases the melon link has excluded or laboratory results aren't yet Health Department said.
Two patients have in Colorado of Listeria last month died, but investigators can only be a dead link to the current outbreak.
Avoid people in the groups at risk for contracting the infection should unpasteurized soft cheese, chilled, smoked fish and Deli meat unless they have been heated to 165 degrees Celsius.
Healthy people are usually not affected by the bacteria. In severe cases, the infection can lead to convulsions and stillbirths or miscarriages in pregnant women.