Thursday, September 29, 2011

Killer cantaloupe, scary sprouts ? what to do? (AP)

MILWAUKEE � Avoid foreign produce. Wash and peel your fruit. Keep it refrigerated. None of these common tips would have guaranteed your safety from the deadliest food outbreak in a decade, the one involving cantaloupes from Colorado.

Whether it's sprouts or spinach, turkey or hamburger; whether the government doubled, tripled or quadrupled inspections, the truth is that no food will ever be completely free of risk.

And a few foods have become so risky that certain people such as children, pregnant women and the elderly may do best to avoid them altogether until growers and the government figure out how to make them safer, some food experts say.

An unappetizing fact: Although the current cantaloupe outbreak has been tied to just one farm in Colorado, it's at least the 19th outbreak involving that melon since 1984. It's also the first one caused by listeria, a germ that actually likes to be in the refrigerator and thrives in this fruit, which cannot be cooked unless you want to eat melon mush.

Listeria also prompted a California farm to recall bags of chopped romaine lettuce on Thursday because of possible contamination, though no illnesses have been reported. The greens from Salinas-based True Leaf Farms went to an Oregon distributor and possibly at least two other states � Washington and Idaho.

So what should you do if you see cantaloupe on a salad bar or at the grocery store? Can you be sure all of the tainted stuff has been pulled from the market, since the last bad melons were shipped on Sept. 10? What if no one knows where the cantaloupe was grown?

"If the store can't tell them or the restaurant can't tell them, I would not buy it at all," said Chris Waldrop, director of the Food Policy Institute at the Consumer Federation of America.

Laura Anderko, a Georgetown University public health expert, went a step further.

"Honestly, as a nurse, I would tell people don't eat the cantaloupe until this thing resolves itself," she said. "This stuff happens because our system is not as tight as it needs to be."

The federal Centers for Disease Control and Prevention, which has confirmed 13 deaths and 72 illnesses in the outbreak so far, has not told people to stop buying cantaloupe. However, the CDC and the Food and Drug Administration cannot even say where all of the tainted melon went, because it was sold and resold to many distributors across the nation.

"When in doubt, throw it out," is the CDC's advice to consumers who have any cantaloupe whose origins they can't determine.

"Even if the cantaloupe is gone, you need to wash the drawer or shelf it may have been on" to make sure other foods don't become contaminated, said Caroline Smith DeWaal, director of food safety at the Center for Science in the Public Interest.

Beyond that, each outbreak brings fresh lessons on how to make produce safer. And while some of these things aren't guarantees, they can cut the odds you'll lose at the food safety lottery.

Some new tips food experts offered Thursday:

� Shop more often and consume fresh fruits and vegetables within a few days. This gives germs less chance to multiply and gives you more nutrients from your food, too.

� Don't just wash a melon. Scrub it under running water to rinse off any dislodged germs, and let it dry. If you cut it while it's still wet, "you may be sliding the pathogens more easily from the outside to the inside" on the knife, DeWaal said.

� Keep the fridge cold, 40 degrees or lower. Higher than that can let germs grow.

� Don't get a false sense of security if you buy organic produce. That just means less pesticide � not necessarily fewer germs.

� Consider dropping especially risky foods from your diet. Bean sprouts are not safe for children, pregnant women or people with weak immune systems and certain diseases, but that doesn't mean they're OK for everyone else, said Michael Doyle, a microbiologist who heads the University of Georgia's Center for Food Safety.

Doyle also consults for a lot of food companies, including a major spinach producer that sought help after outbreaks involving that vegetable. He has chaired a food safety advisory council for McDonald's for many years.

"I don't eat sprouts at all," he said. If harmful bacteria are in the seeds "they grow in the sprouting process, and there's nothing to kill them unless you cook them."

You can go too far with this, though. Even Dr. Robert Tauxe, the CDC's top food-germ sleuth, once confessed over lunch that he refused to live in fear of the fork, and that there were only a few foods he absolutely wouldn't eat, such as raw oysters and unpasteurized milk.

Beyond that, safe handling and cooking can generally keep most foods safe, he said.

The big picture is important, said Robert Gravani, a food scientist at Cornell University.

A gazillion pounds of produce are consumed each day, and only a tiny fraction cause problems, he said.

"I have a hard time saying, `Don't eat produce,' because of all of the health benefits," he said. "Everything we do has some degree of risk attached to it."

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Online:

Food safety tips: www.cspinet.org, http://www.fightbac.org

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Marilynn Marchione can be followed at http://twitter.com/MMarchioneAP



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If you're happy and you know it, did you tweet? (AP)

WASHINGTON � Twitter confirms it: People tend to wake up in a good mood and are happiest on weekends. The fast-paced forum is offering scientists a peek at real-time, presumably little-filtered human behavior and thoughts. Cornell University researchers turned to the microblog to study mood and found a pretty consistent pattern.

The researchers analyzed English-language tweets from 2.4 million people in 84 countries, more than 500 million of the brief, conversation-like exchanges sent over two years. They used a computer program that searched for words indicating positive mood � happy, enthusiastic, brilliant � or negative mood � sad, anxious, fear.

What they found: Unless you're a night owl, a positive attitude peaks early in the morning and again near midnight, but starts to dip midmorning before rising again in the evening.

Aha, you might think, going to work and related hassles like traffic explain that pattern. After all, there was more positive tweeting on the weekend, even though the morning peak of happy tweets occurred two hours later, probably because people slept late.

Not quite. Work-related stress may play some role but it can't explain why that same midday dip occurs on the weekend, too, said lead researcher Scott Golder, a Cornell graduate student. Instead, the pattern probably is due to the effects of sleep and our 24-hour biological clock, the so-called circadian rhythms that signal when it's time to sleep and to wake, Golder and Cornell sociologist Michael Macy reported. Their study appears in Friday's edition of the journal Science.

The researchers also examined tweets in the United Arab Emirates, where Friday and Saturday are considered the weekend. Sure enough, they found the same daily pattern, even though the workday tends to begin earlier there than in the West, and the same weekend pattern.

Previous research has linked the biological clock and mood, but was based mostly on small studies of American college students. There are cautions about studying Twitter postings, too: Their authors tend to be younger than the general population, and may be more affluent, better educated and different in yet-to-be-discovered ways.

Still, the study's bigger message is about the scientific potential of social media, Macy said.

Other researchers have turned to Twitter to study political campaigning, to blog postings and Twitter feeds to study emotions, and to Google searches of flu symptoms to predict outbreaks.

"It illustrates a new opportunity for doing social and behavioral science in ways that were really unimaginable even five years ago," Macy said.

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Science: http://www.sciencemag.org/



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CDC: Miners, construction, food workers smoke most (AP)

ATLANTA � A new government report says construction workers, miners and food service workers are the occupations that smoke the most. Experts say that may have as much to do with education levels as the jobs themselves.

The Centers for Disease Control and Prevention study found 19.6 percent of working adults smoke, but as many as 30 percent in the mining, construction and food service industries smoke. Librarians and teachers smoked the least, at less than 9 percent.

Also, people who work outdoors are less likely to face indoor smoking bans seen in other workplaces.

The study is based on in-person interviews of more than 113,000 working adults in the years 2004 through 2010.

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Online:

CDC report: http://www.cdc.gov/mmwr



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