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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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Tampilkan postingan dengan label common. Tampilkan semua postingan
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Minggu, 29 Januari 2012

Common substance may fight food poisoning hazard

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NEW YORK (AP) — A substance found in nuts and whole grains may someday help doctors fight the kind of food poisoning that sickened thousands of people in Europe last summer, a study in mice suggests.

While a variety of germs can cause food poisoning, the European outbreak involved a dangerous strain of the bacterium E. coli. It infects people and pumps out a poison called Shiga toxin. Some other bacteria also produce this toxin, which overall causes more than 1 million deaths a year worldwide. The European food poisoning outbreak included about 4,000 people and 50 deaths.

There's no definitive treatment for Shiga toxin. But in Friday's issue of the journal Science, scientists report that they could protect mice against a lethal dose by injecting them with the mineral manganese.

The animals were injected daily, starting five days before they were exposed to the toxin. While untreated mice died within four days, the injected mice remained healthy. The manganese made the toxin vulnerable to being destroyed by cells.

Scientists still need to do more research before they can assess the usefulness of manganese in treating people. Manganese is already approved for medical use and it's inexpensive, they note. So that might make it especially useful in developing countries, where nearly all cases of Shiga toxin poisoning occur, wrote the researchers, from Carnegie Mellon University in Pittsburgh.

___

Online:

Science: http://www.sciencemag.org

Associated Press

Source AP



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Kamis, 06 Oktober 2011

The age-old fight against the common cold

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4 October 2011 Last updated at 10:25 GMT By Jon Kelly BBC News Magazine Woman sneezing As the weather finally cools, pharmacies brace themselves for the beginning of the "winter remedies" rush. But why are people still searching for a cure for the common cold?

Can you feel it coming on yet - the sore throat, the fever, the streaming nose, the headache?

If so, get well soon. But you can take comfort in the fact that you'll soon be in good company.

October marks the start of the peak season for the UK's "winter remedies" market - the over-the-counter pharmaceuticals used to treat the common cold.

But if decongestants, cough sweets and hot, lemon-flavoured drinks are the modern-day methods by which we tackle the familiar symptoms, humankind has a long tradition of searching out ways to soothing this most familiar of conditions.

From ancient Greece to mediaeval Europe, blood-letting, leeches and more resilient treatments like chicken soup have all been used in attempts to ease recovery.

But though our understanding of the viruses that cause colds has improved over time, and with it our remedies, a cure remains as elusive as ever.

And with the average UK adult suffering two to five colds a year, according to Cardiff University's Common Cold Centre, it is little wonder that un-bunging ourselves is big business.

In 2010, the market research company Mintel says sales of winter remedies were worth £532m - an increase of 10% over five years. In the US, it has been suggested that the cost of colds to the American economy could be as much as $40bn (£26bn).

Continue reading the main story Common cold is not a single disease but caused by up to 200 different virusesBy the time the symptoms - caused by the body's immune system reacting to these viruses - are present it would be too late for an antivirusAny new medication would have to be extremely safe as it would be very popularIt would not be worth taking unless the side effects were extremely mild or non-existent If the medicine was widely used, cold viruses would quickly develop resistance in the same way bacteria have overcome antibioticsThe advice given by doctors to patients suffering from colds may be straightforward - rest, drink lots of fluid, take moderate doses of painkiller and decongestant to ameliorate the symptoms. But treatments have varied wildly down the years.

According to Prof Ronald Eccles of Cardiff's Common Cold Centre, colds have been with us since humans gathered in any sort of community - at least since the Iron Age onwards.

For at least 3,000 years, the Chinese have treated blocked noses with ma huang, a plant often brewed as tea. It contains pseudoephedrine, commonly used in modern over-the-counter cold remedies as a decongestant.

Early thinkers believed cold symptoms were caused by the penetration of low temperatures into the body and warm drinks were used to treat this, Prof Eccles says.

The ancient Greek physician Hippocrates, who pioneered the practice of clinical observation, believed colds were caused by a build-up of waste matter on the brain.

Chicken soup was hailed as a treatment as early as AD60 by Pedacius Dioscorides, a Roman surgeon under Nero, and it was hailed as "an excellent food as well as medication" by the 12th Century physician Moses Maimonides. In fact, neither were far wide of the mark - modern studies have demonstrated that chicken contains the amino acid cysteine, which has mild decongestant proprieties.

James Wong and Sophie Dahl test Mrs Beeton's homemade cold remedy

However, not all early cold treatments had a kernel of science to them.

"Old European ideas related to accumulation of fluid in the body that was expelled via the nose - hence bleeding and medicines that made patients vomit were popular to rid body of excess fluid," Prof Eccles adds.

Despite this, some mediaeval treatments were inadvertently valuable. In the Middle Ages, some Christians believed the soul could leave the body during sneezing, so cold sufferers were urged to cover their mouths - a custom which would have prevented the spread of viruses.

As the early modern period dawned, it was external rather than internal precipitation that became the focus, according to Dr Carole Reeves of University College London's Centre for the History of Medicine.

"The idea of catching cold was that it was about getting wet, getting it in the rain, getting a chill, being out in the cold weather," she says. "The idea of catching it from other people wasn't there in the way it is now."

For this reason, she says, bathing was discouraged for cold sufferers.

"It was believed that it would soften your skin and weaken your body," adds Dr Reeves.

Continue reading the main story

From Mrs Beeton's Book of Home Management, published in 1861

"TO CURE A COLD. Put a large teacupful of linseed [seeds, not oil], with 1/4 lb. of sun raisins [these are just raisins] and 2 oz of stick liquorice, into 2 quarts of soft water, and let it simmer over a slow fire till reduced to one quart; add to it 1/4 lb of pounded sugar-candy [sugar], a tablespoonful of old rum, and a tablespoonful of the best white-wine vinegar, or lemon-juice.

"The rum and vinegar should be added as the decoction is taken; for, if they are put in at first, the whole soon becomes flat and less efficacious.

"The dose is half a pint, made warm, on going to bed; and a little may be taken whenever the cough is troublesome.

"The worst cold is generally cured by this remedy in two or three days; and, if taken in time, is considered infallible.

"COLD ON THE CHEST. A flannel dipped in boiling water, and sprinkled with turpentine, laid on the chest as quickly as possible, will relieve the most severe cold or hoarseness."

These notions were eventually dispelled by none other than Benjamin Franklin, the noted polymath, scientist and Founding Father of the United States, who conducted studies into the common cold and concluded that it was transmitted through the air between individuals.

The dawn of the Victorian era saw no let-up in the search for a cure. In Mrs Beeton's Book of Home Management, a best-seller for decades after it was first published in 1861, there is a chapter on first aid and home remedies - including a hot toddy cold treatment.

Containing linseed, sun raisins, liquorice and rum, Mrs Beeton wrote that the "worst cold is generally cured by this remedy in two or three days". She added that the mixture, "if taken in time, is considered infallible".

Her claim that the mixture could cure colds may have been an overstatement. But according to Prof Eccles, it would certainly have proved soothing.

"Any hot, sweet, tasty remedy will provide good relief from common cold symptoms, especially cough and sore throat," he says.

Many of the treatments we see on the shelves of modern-day pharmacists were developed in the wake of studies carried out by the Common Cold Unit, a research institute near Salisbury, Wiltshire, which operated from 1946 to 1989.

Its founding purpose - to find a cure - may never have been achieved. But the unit deepened scientific understanding of the condition, isolating coronaviruses and rhinoviruses, two of the most frequent causes of colds.

Its research was conducted by studying paid volunteers who would stay at the site for around 10 days at a time. According to Prof Tilli Tansey, a medical historian at Queen Mary University of London, who has studied the unit, it became an oddly popular form of package holiday during the post-war years.

"It was a bit like Butlins," she says. "Some people did see it as a holiday - this was the era of austerity. You'd go off for a couple of weeks, stay in a chalet and have your meals cooked for you."

Such was the basis of our modern "winter remedies". In the 21st Century, however, few are likely to treat a cold as a leisure break.



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Sabtu, 01 Oktober 2011

10 Risky Behaviors More Common in Sleepy Teens

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More than two-thirds of teens aren't getting enough sleep on school nights and that's a problem. According to the latest study by the Centers for Disease Control and Prevention, sleepy teens were more likely to engage in risky health behaviors, compared with their 8-hours-a-night peers.

Research consistently shows that poor sleep is linked to negative health outcomes, like high blood pressure, weight gain and even early death. Sleeplessness during adolescence, largely fueled by computer and Internet use, has also been linked with an increased risk of depression and anxiety.

Last year, the medical journal Sleep published a series of studies on the consequences of sleeplessness among teens. I wrote, at the time:

Researchers found that for each hour of lost sleep, levels of psychological distress rose by 5% in nearly 3,000 17-to-24-year-olds who were followed for 12 to 18 months. Overall, short sleepers were 14% more likely to report symptoms of psychological distress on a standard test, compared with people who got adequate sleep. The effect was especially pronounced among young people who already suffered from anxiety; in this group, lack of sleep triggered more serious mental health problems like full-blown depression and even bipolar disorder, according to the study's lead author, Professor Nick Glozier. But even among those who began the study in good health, less than five hours of sleep meant tripling their odds of psychological distress.

MORE: Tip for Insomniacs: Cool Your Head to Fall Asleep

The new findings, which were based on data from the 2007 National Youth Risk Behavior Survey, fit in with past research. The study authors found that 69% of more than 12,100 adolescents aged 12 to 18 reported getting less than the recommended 8 hours of sleep on the average school night. Sleep-deprived kids were more likely than their well-rested peers to report the following 10 risky health behaviors:

Drank full-sugar soda at least once per dayParticipated in 60 mins. of physical activity fewer than twice in the preceding weekSpent three or more hours each day on the computerHad been in at least one physical fightSmoked cigarettesDrank alcoholUsed marijuanaWas sexually activeHad feelings of sadness or hopelessnessSeriously considered attempting suicide

Of course, it's impossible to know whether teens' sleeplessness contributed to these problems, or the other way around. It's could well be that things like depression, lack of exercise, Internet use and drinking high-sugar beverages may interfere with proper sleep. But the study, which was published online by Preventive Medicine, is the first to draw associations between lack of sleep and risky health behaviors on a national scale.

MORE: Are You Among the Sleepless Elite — or Just the Sleep Deprived?

The researchers suggest that public health policies encouraging more sleep in teenagers — such as starting the school day later —are needed. "Many adolescents are not getting the recommended hours of sleep they need on school nights. Insufficient sleep is associated with participation in a number of health-risk behaviors including substance use, physical fighting, and serious consideration of suicide attempt," said the CDC's Lela McKnight-Eily in a statement. "Public health intervention is greatly needed, and the consideration of delayed school start times may hold promise as one effective step in a comprehensive approach to address this problem."

Meredith Melnick is a reporter at TIME. Find her on Twitter at @MeredithCM. You can also continue the discussion on TIME's Facebook page and on Twitter at @TIME.



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Kamis, 29 September 2011

How to tackle common toddler traumas

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If your child won't stop crying, bring him to the emergency room. If your child won't stop crying, bring him to the emergency room. Most kids who bump their heads are fine"Human bites are among the dirtiest of all wounds due to bacteria," Karen Frush saidSometimes symptoms take a few hours to appear

(Parenting.com) -- When your toddler is hurt and screaming and emotions are bubbling over, it can be hard to tell if a situation is a true emergency, something that can be treated in your doctor's office or an issue you can handle at home.

"It's always better to call the pediatrician before going to the ER for anything but life-threatening emergencies," says Lara Zibners M.D., a pediatric ER doctor and author of "If Your Kid Eats This Book, Everything Will Still Be Okay."

We spoke to pediatric ER doctors about the most common accidents and whether your child's doctor will deal with the issue over the phone, have you come into the office or call the ER to alert them that your child is on the way.

What if your baby pulls up on the coffee table and then yanks a mug of hot tea on herself? Head to the ER if the burn covers a large part of her body; if it's on her face, hands, feet or genitals; or if it's a third-degree burn, which is pretty unlikely from a hot beverage. Otherwise, treat her at home and act fast. Since the first thing to do is get the hot liquid off the body, Dr. Zibners recommends removing the wet clothing and plunking her into a cool shower.

"If it's only a small part of the hand or arm that's been burned," she says, "running cool water over the limb in the sink for 10 to 15 minutes or until the pain subsides will stop further injury and provide immediate pain relief." Keep the area in water until it's cool to the touch, then treat the burn.

At-home burn basics

If she has a first-degree burn (the skin is red), follow these tips:

DO: After the burn has cooled, cover it loosely with a dry bandage or clean cloth.

DON'T: Apply ointments (or butter). This could cause infection or trap heat and make the burn deeper. Do not break any blisters. This could allow bacteria into the wound.

What if your toddler topples off his changing table? The goose egg is huge, and he's hysterical. Head to the ER?

For kids older than 12 months, you can take a watch-and-wait approach. Dr. Zibners says most kids who bump their heads are fine, and the size of the bump rarely has anything to do with the extent of the injury. There are loads of blood vessels in the head and face, so the swelling can be dramatic.

Keep an eye on him for the next few hours to make sure he doesn't limp or favor one arm, vomit or become unusually sleepy or especially irritable. If you see any of these signs, call the doctor as they could mean something more serious. And, of course, if your child is motionless or unconscious or refuses to move after his fall, call an ambulance right away. The exception: Dr. Zibners says any child under a year of age who experiences more than a minor bump should always be checked out by a physician because injuries are harder to detect when the patient can't talk.

Parenting.com: How to decode that strange rash

Diaper duty

The American Academy of Pediatrics offers these guidelines for safe diaper changing:

- Choose a changing pad with a concave middle to keep baby in place.
- Always buckle the safety strap.
- Keep diapering supplies within your reach (but out of baby's).

What if another kid bites your baby and the skin is broken? Call your pediatrician right away. She may decide to send you to the ER, depending on the location of the bite and its appearance. (She might prescribe an oral antibiotic.) Otherwise, wash the wound immediately and thoroughly with soap and warm water and then apply an antibiotic ointment and bandage.

"Human bites are among the dirtiest of all wounds due to bacteria normally found in the human mouth," says Karen Frush M.D., a pediatric emergency room doctor and chief patient safety officer at Duke University Health System in Durham, North Carolina. "Thoroughly washing the skin with soap and water is the best thing a parent can do to effectively reduce the bacteria load found in the wound."

Parenting.com: How gross is it? Your germiest situations analyzed

What if someone sideswipes your car? Your child is strapped into his safety seat, but he's upset and crying. Head to the ER? Only if he doesn't calm down after a reasonable amount of time, say 15 or 20 minutes.

"With children age 5 and under who are properly restrained in an age-appropriate car seat, the likelihood of injury is small in a non-or low-impact situation," says Dr. Frush.

But if your child won't stop crying, bring him to the emergency room.

"That may mean he was subjected to unusual force, and a doctor can figure out if there are any injuries," she adds. Generally, though, if your child is moving his arms and legs, the best thing to do is remove him from his car seat, try to calm him and make sure he's OK.

Warning signs

Sometimes symptoms take a few hours to appear. Call the doctor if you notice these signs:

- Blood in his urine (which could be a result of injury to the upper or lower urinary tract).
- Bruising over his chest or belly from the straps.
- Refusing to move or turn his head.
- Refusing to bear weight.

What if your toddler falls, bites her tongue and it's bleeding buckets? Head to the ER? Only if it's still bleeding after 10 or 15 minutes of applying direct pressure with a clean washcloth. The tongue is full of blood vessels, so it'll bleed a lot, which may scare her (and you!).

"With young children [applying direct pressure] is often very difficult, so it may be helpful to encourage her to suck on an ice pop, which can also provide pressure on the tongue and sometimes help stop the bleeding," says Dr. Frush. She adds that tongues usually heal nicely and it's very rare a child will lose enough blood from a tongue injury to become anemic.

Parenting.com: 9 pediatric emergency essentials

To treat a tongue bite

DO: Dampen a clean washcloth with cool water, seat your child on your lap, then press the washcloth over the injured area of the tongue. Feed her cold foods, such as frozen yogurt.

DON'T: Give your baby any acidic or salty foods while her tongue is healing because it will sting and make the pain worse.

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