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Q&A: Obesity

Obesity is a major issue around the world, and as more and more people put on excess weight it is a problem that is only likely to get worse.

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In the UK it is estimated that one in five men and a quarter of women are obese, and that as many as 30,000 people die prematurely every year from obesity-related conditions.

How do you know if you are obese?

Most doctors calculate obesity using a formula known as the Body Mass Index (BMI).

It is a measure based on height and weight that applies to both adult men and women.

To calculate your BMI divide your weight in kilograms by the square of your height in metres.

A BMI of 25 to 29.9 is considered overweight and one of 30 or above is considered obese.

Doctors have recently recognised a new category: those with a BMI above 40 are considered morbidly obese.

People with BMIs between 19 and 22 live longest. Death rates are noticeably higher for people with indexes 25 and above.

Underweight: less than 20
Normal weight: 20-25
Overweight: 25 – 29.9
Obese: over 30
Morbidly obese: over 40

Click to Calculate your BMI

The BMI is not infallible. For instance, it is possible for a healthy, muscular athlete with very low body fat to be classified obese using the BMI formula.

Why is obesity a problem?

Experts believe that obesity is responsible for more ill health even than smoking.

Being significantly overweight is linked to a wide range of health problems, including:

* Heart disease.
* High blood pressure.
* Arthritis.
* Diabetes.
* Indigestion.
* Gallstones.
* Some cancers (e.g. breast, prostate).
* Snoring and sleep apnoea. Stress, anxiety, and depression

What is the wider impact of obesity?

A study by the National Audit Office has estimated that obesity costs the NHS at least £500m a year – and the wider economy more than £2bn a year in lost productivity.

The problem is growing rapidly. Experts predict that if the current rate of growth continues, three-quarters of the population could suffer the ill effects of excess weight within 10 to 15 years.

Why is obesity on the increase?

It would be tempting to suggest that more people are seriously overweight than ever before because they eat too much.

Certainly, experts are worried about the high fat and sugar levels in many convenience and mass-produced foods. There is also concern about the advent of ‘super-sized’ portions, already popular in the US.

However, the reality is not as simple as that. A significant factor is that modern life is more sedentary than ever before.

A recent study showed that housewives in the 1950s actually ate more calories than their modern counterparts – but they were significantly slimmer because their daily lives involved far more physical activity.

What action do campaigners want?

The government has been accused of failing to implement “joined up thinking” in tackling obesity.

It has been criticised for focussing on cars in its transport policy, rather than advocating the healthier options of walking and cycling.

Parents have called for vending machines selling crisps and chocolate to be taken out of schools.

The government has also been urged to do more to persuade the food industry to promote healthy foods to consumers.

What is actually being done?

The government is due to publish a public health White Paper in the summer which will look at what can be done to tackle obesity.

It has already published consultation papers on diet and exercise in schools, how employers could help workers get fit and how manufacturers can reduce fat, sugar and salt in food, which will inform the White Paper.

Measures such as a ban on junk food ads to children are also being considered.

The Chief Medical Officer also published a report urging people to exercise five times a week in order to stay healthy.

How can you tackle obesity?

The best way to tackle the problem is by not getting fat in the first place. A combination of a healthy, balanced diet, and regular exercise should do the trick in most instances.

Experts recommend vigorous exercise such as brisk walking, swimming or cycling five times a week for 20-30 minutes.

For those who have been unable to avoid piling on the pounds, weight management clinics are available to provide expert help and advice.

In severe cases doctors may prescribe drug therapies, which have been shown to have some positive impact.

Among these are orlistat (brand name Xenical), which works by blocking the digestion of fat.

Another drug which has produced promising results is sibutramine (Reductil), which works by boosting the signal to stop eating so that patients feel fuller sooner and eat less.

Is surgery an option?

Yes, but it is usually only recommended for the most extreme cases, as the surgery itself can be risky, and the patients require lifelong monitoring for potential complications.

Two types of surgery are in use:

* Roux-en-Y: Staples or bands are used to make the stomach smaller and allow food to bypass part of the small intestine where many nutrients are absorbed.

* Extensive gastric bypass: A more complicated procedure, in which the lower portion of the stomach is bypassed. The small pouch that remains is connected directly to the final segment of the small intestine.

In theory both operations are reversible, but this can be difficult. Reversal is almost always accompanied by rapid regain of body weight.

An alternative is to wire up the jaw to prevent people chewing food. This can help people lose weight, but many doctors are concerned about the psychological impact. It also does little to encourage healthy eating.

Sources:http://news.bbc.co.uk/2/hi/health/medical_notes/3189930.stm

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Rheumatoid Arthritis May be a Bigger Risk for Big Babies

THOSE BIG 10-pound newborns that look like future Hall of Famers may be at an increased risk of rheumatoid arthritis. In a study of 84,077 women participating in the Nurses’ Health Study from 1976 to 1992, Dr. Lisa Mandl at the Hospital for Special Surgery in New York and colleagues found that people who weighed more than 10 pounds at birth were twice as likely to develop rheumatoid arthritis as those who were of normal weight — 7.1 to 8.5 pounds — at birth.

This is not to say that heavier birth weight causes rheumatoid arthritis, Mandl says — both may have the same underlying cause. “The same stressors that are preprogramming the fetus to be heavier when born may also be programming the fetus to develop rheumatoid arthritis later in life,” she said. Gestational diabetes, for example, might create a large baby and also alter how the fetus produces hormones, possibly setting up the body for rheumatoid arthritis later in life.

Other researchers have noted a correlation between high and low birth weight and disease. Low birth weight has been associated with an increased risk of Type 2 diabetes, heart disease and hypertension; high birth weight with a disorder called Sjögren’s syndrome. The results appeared online last week in the Annals of the Rheumatic Diseases.

Sources: Los Angles Times

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Peptic Ulcer

Definition:
Peptic ulcers are open sores that develop on the inside lining of your stomach, upper small intestine or esophagus. The most common symptom of a peptic ulcer is pain.Not long ago, the common belief was that peptic ulcers were a result of lifestyle. Doctors now know that a bacterial infection or some medications — not stress or diet — cause most ulcers of the stomach and upper part of the small intestine (duodenum). Esophageal ulcers also may occur and are typically associated with the reflux of stomach acid.

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A peptic ulcer, also known as PUD or peptic ulcer disease, is an ulcer (defined as mucosal erosions equal to or greater than 0.5 cm) of an area of the gastrointestinal tract that is usually acidic and thus extremely painful. As much as 80% of ulcers are associated with Helicobacter pylori, a spiral-shaped bacterium that lives in the acidic environment of the stomach, however only 20% of those cases go to a doctor. Ulcers can also be caused or worsened by drugs such as Aspirin and other NSAIDs. Contrary to general belief, more peptic ulcers arise in the duodenum (first part of the small intestine, just after the stomach) than in the stomach. About 4% of stomach ulcers are caused by a malignant tumor, so multiple biopsies are needed to make sure. Duodenal ulcers are generally benign.

Classification

A peptic ulcer may arise at various locations:

* Stomach (called gastric ulcer)
* Duodenum (called duodenal ulcer)
* Esophagus (called esophageal ulcer)
* Meckel’s Diverticulum (called Meckel’s Diverticulum ulcer)

Signs and symptoms:

Burning pain is the most common peptic ulcer symptom. The pain is caused by the ulcer and is aggravated by stomach acid coming in contact with the ulcerated area. The pain typically may:

* Be felt anywhere from your navel to your breastbone
* Last from a few minutes to many hours
* Be worse when your stomach is empty
* Flare at night
* Often be temporarily relieved by eating certain foods that buffer stomach acid or by taking an acid-reducing medication
* Come and go for a few days or weeks

Less often, ulcers may cause severe signs or symptoms such as:

* The vomiting of blood — which may appear red or black
* Dark blood in stools or stools that are black or tarry
* Nausea or vomiting
* Unexplained weight loss
* Chest pain

A history of heartburn, gastroesophageal reflux disease (GERD) and use of certain forms of medication can raise the suspicion for peptic ulcer. Medicines associated with peptic ulcer include NSAID (non-steroid anti-inflammatory drugs) that inhibit cyclooxygenase, and most glucocorticoids (e.g. dexamethasone and prednisolone).

In patients over 45 with more than 2 weeks of the above symptoms, the odds for peptic ulceration are high enough to warrant rapid investigation by EGD (see below).

The timing of the symptoms in relation to the meal may differentiate between gastric and duodenal ulcers: A gastric ulcer would give epigastric pain during the meal, as gastric acid is secreted, or after the meal, as the alkaline duodenal contents reflux into the stomach. Symptoms of duodenal ulcers would manifest mostly before the meal — when acid (production stimulated by hunger) is passed into the duodenum. However, this is not a reliable sign in clinical practice.
Causes:
Depending on their location, peptic ulcers have different names:

* Gastric ulcer. This is a peptic ulcer that occurs in your stomach.
* Duodenal ulcer. This type of peptic ulcer develops in the first part of the small intestine (duodenum).
* Esophageal ulcer. An esophageal ulcer is usually located in the lower section of your esophagus. It’s often associated with chronic gastroesophageal reflux disease (GERD).

The culprit in most cases
Although stress and spicy foods were once thought to be the main causes of peptic ulcers, doctors now know that the cause of most ulcers is the corkscrew-shaped bacterium Helicobacter pylori (H. pylori).

H. pylori lives and multiplies within the mucous layer that covers and protects tissues that line the stomach and small intestine. Often, H. pylori causes no problems. But sometimes it can disrupt the mucous layer and inflame the lining of the stomach or duodenum, producing an ulcer. One reason may be that people who develop peptic ulcers already have damage to the lining of the stomach or small intestine, making it easier for bacteria to invade and inflame tissues.

H. pylori is a common gastrointestinal infection around the world. In the United States, one in five people younger than 30 and half the people older than 60 are infected. Although it’s not clear exactly how H. pylori spreads, it may be transmitted from person to person by close contact, such as kissing. People may also contract H. pylori through food and water.

H. pylori is the most common, but not the only, cause of peptic ulcers. Besides H. pylori, other causes of peptic ulcers, or factors that may aggravate them, include:

*Regular use of pain relievers. Nonsteroidal anti-inflammatory drugs (NSAIDs) can irritate or inflame the lining of your stomach and small intestine. The medications are available both by prescription and over-the-counter. Nonprescription NSAIDs include aspirin, ibuprofen (Advil, Motrin, others), naproxen (Aleve) and ketoprofen (Orudis KT). To help avoid digestive upset, take NSAIDs with meals.

NSAIDs inhibit production of an enzyme (cyclooxygenase) that produces prostaglandins. These hormone-like substances help protect your stomach lining from chemical and physical injury. Without this protection, stomach acid can erode the lining, causing bleeding and ulcers.
* Smoking. Nicotine in tobacco increases the volume and concentration of stomach acid, increasing your risk of an ulcer. Smoking may also slow healing during ulcer treatment.
* Excessive alcohol consumption. Alcohol can irritate and erode the mucous lining of your stomach and increases the amount of stomach acid that’s produced. It’s uncertain, however, whether this alone can progress into an ulcer or whether other contributing factors must be present, such as H. pylori bacteria or ulcer-causing medications, such as NSAIDs.
* Stress. Although stress per se isn’t a cause of peptic ulcers, it’s a contributing factor. Stress may aggravate symptoms of peptic ulcers and, in some cases, delay healing. You may undergo stress for a number of reasons — an emotionally disturbing circumstance or event, surgery, or a physical trauma, such as a burn or other severe injury.

Complications:

* Gastrointestinal bleeding is the most common complication. Sudden large bleeding can be life threatening[2]. It occurs when the ulcer erodes one of the blood vessels.
* Perforation (a hole in the wall) often leads to catastrophic consequences. Erosion of the gastro-intestinal wall by the ulcer leads to spillage of stomach or intestinal content into abdominal cavity. Perforation at the anterior surface of stomach leads to acute peritonitis, initially chemical and later bacterial peritonitis. Often first sign is sudden intense abdominal pain. Posterior wall perforation leads to pancreatitis; pain in this situation often radiates to back.
* Penetration is when the ulcer continues into adjacent organs such as liver and pancreas[3].
* Scarring and swelling due to ulcers causes narrowing in the duodenum and gastric outlet obstruction. Patient often presents with severe vomiting.
* Pyloric Stenosis

Diagnosis:
n order to detect an ulcer, your doctor may have you undergo the following diagnostic tests:

* Upper gastrointestinal (upper GI) X-ray. Your doctor may begin with this test, which outlines your esophagus, stomach and duodenum. During the X-ray, you swallow a white, metallic liquid (containing barium) that coats your digestive tract and makes an ulcer more visible. An upper GI X-ray can detect some ulcers, but not all.
* Endoscopy. This procedure may follow an upper GI X-ray if the X-ray suggests a possible ulcer, or your doctor may perform endoscopy first. In this more sensitive procedure, a long, narrow tube with an attached camera is threaded down your throat and esophagus into your stomach and duodenum. With this instrument, your doctor can view your upper digestive tract and identify an ulcer.

If your doctor detects an ulcer, he or she may remove small tissue samples (biopsy) near the ulcer. These samples are examined under a microscope to rule out cancer. A biopsy can also identify the presence of H. pylori in your stomach lining. Depending on where the ulcer is found, your doctor may recommend a repeat endoscopy after two to three months to confirm that the ulcer is healing.

Additional tests
In addition to a biopsy, these other tests can determine if the cause of your ulcer is H. pylori infection:

* Blood test. This test checks for the presence of H. pylori antibodies. A disadvantage of this test is that it sometimes can’t differentiate between past exposure and current infection. After H. pylori bacteria have been eradicated, you may still have a positive result for many months.
* Breath test. This procedure uses a radioactive carbon atom to detect H. pylori. First, you blow into a small plastic bag, which is then sealed. Then, you drink a small glass of clear, tasteless liquid. The liquid contains radioactive carbon as part of a substance (urea) that will be broken down by H. pylori. Thirty minutes later, you blow into a second bag, which also is sealed. If you’re infected with H. pylori, your second breath sample will contain the radioactive carbon in the form of carbon dioxide.

The advantage of the breath test is that it can monitor the effectiveness of treatment used to eradicate H. pylori, detecting when the bacteria have been killed or eradicated. With the blood test, H. pylori antibodies may sometimes still be present a year or more after the infection is gone.
* Stool antigen test. This test checks for H. pylori in stool samples. It’s useful both in helping to diagnose H. pylori infection and in monitoring the success of treatment.

Treatment:
Younger patients with ulcer-like symptoms are often treated with antacids or H2 antagonists before EGD is undertaken. Bismuth compounds may actually reduce or even clear organisms.

Patients who are taking nonsteroidal anti-inflammatories (NSAIDs) may also be prescribed a prostaglandin analogue (Misoprostol) in order to help prevent peptic ulcers, which may be a side-effect of the NSAIDs.

When H. pylori infection is present, the most effective treatments are combinations of 2 antibiotics (e.g. Clarithromycin, Amoxicillin, Tetracycline, Metronidazole) and 1 proton pump inhibitor (PPI), sometimes together with a bismuth compound. In complicated, treatment-resistant cases, 3 antibiotics (e.g. amoxicillin + clarithromycin + metronidazole) may be used together with a PPI and sometimes with bismuth compound. An effective first-line therapy for uncomplicated cases would be Amoxicillin + Metronidazole + Rabeprazole (a PPI). In the absence of H. pylori, long-term higher dose PPIs are often used.

Treatment of H. pylori usually leads to clearing of infection, relief of symptoms and eventual healing of ulcers. Recurrence of infection can occur and retreatment may be required, if necessary with other antibiotics. Since the widespread use of PPI’s in the 1990s, surgical procedures (like “highly selective vagotomy”) for uncomplicated peptic ulcers became obsolete.

Perforated peptic ulcer is a surgical emergency and requires surgical repair of the perforation. Most bleeding ulcers require endoscopy urgently to stop bleeding with cautery or injection.

Click to see:->Homeopathic Treatment for Peptic Ulcer

>Ayurvedic-Integrated Medical Treatment

> Natural way to cure peptic ulcer

Disclaimer: This information is not meant to be a substitute for professional medical advise or help. It is always best to consult with a Physician about serious health concerns. This information is in no way intended to diagnose or prescribe remedies.This is purely for educational purpose

Sources:
http://en.wikipedia.org/wiki/Peptic_ulcer
http://www.mayoclinic.com/health/peptic-ulcer/DS00242

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Hot Baths May Cut Male Fertility

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Soaking in the tub may reduce men’s fertility, say US researchers.

Findings from a three-year study support current advice that men should avoid ‘overheating’ their sperm.

Sperm counts in five of 11 men with fertility problems soared by 491% after they stopped having baths or using the hot tub for a few months.

Other research has shown heat from laptop use and wearing tight underwear can reduce fertility the Journal of the Brazilian Society of Urology reports.

The researchers from the University of California, San Francisco, said although it had been believed for decades that ‘wet heat’ could damage fertility, there had been very little research.

Men attending a fertility clinic who were exposed to more than 30 minutes per week of ‘wet heat’ through hot baths, Jacuzzis or hot tubs, were recruited to the study.

After three to six months of staying out of the bath, just under half the men showed dramatic five-fold improvement in sperm count.

Sperm motility increased from 12% to 34% in the men who responded to cutting out baths.

Five of the six men who showed no improvement were chronic smokers, which the researchers said could have influenced the lack of response.

Cool environment

Sperm are known to develop best in cool surroundings which is why the testicles are situated outside the man’s body within the scrotum.

Study leader, Dr Paul Turek, director of the UCSF Male Reproductive Health Center said: “These activities can be comfortably added to that list of lifestyle recommendations and ‘things to avoid’ as men attempt to conceive.”

He added that if men could improve their fertility through avoiding hot baths, couples may be able to avoid IVF or choose less invasive treatment.

“Couples really prefer having kids at home and not with technology. This is a way to help them do that.”

According to Dr Turek, the only other published study looking at the link between hot baths and fertility was done in 1965.

After exposing men to ‘wet heat’ for 30 minutes on alternating days, researchers found a temporary decline in sperm production but did not look at sperm quality before and after the study.

Dr Allan Pacey, senior lecturer in andrology at the University of Sheffield said it seemed intuitive that hot baths could contribute to reduced numbers of sperm but it was unclear whether it actually contributed to fertility.

“Ideally, this study needs to be repeated with a much larger number of patients, and with a clearly defined control group, before we can be certain that hot baths are a genuine risk factor for male sub-fertility

“Changes in sperm quality are one thing, but it is pregnancies that matter.

“However, it would do no harm for men who are concerned about their fertility to take a shower instead of a bath.”

Sources: BBC NEWS, march5,2007

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Cold Sore Virus Secret Revealed

The secret of how the cold sore virus manages to persist for a lifetime in the human body may have been cracked by US scientists.

The herpes simplex virus 1 (HSV-1) can lie dormant in facial nerves, emerging periodically to cause sores.

A Duke University Medical Center team may have uncovered how it can reactivate itself from a dormant state.

The finding, published in the journal Nature, could eventually lead to new treatments.

When fighting a virus, the immune system relies heavily on the protein chemicals produced by the virus which it uses to help mark it for destruction.

Herpes viruses manage to evade the immune system by shutting down production of these proteins completely, and remaining in this state for long periods before starting to replicate again.

Wake-up call

This is why patients, once infected, have occasional flare-ups of cold sores or genital herpes, and can never get rid of the infection completely.

However, there is one thing that HSV-1 does produce, the precise role of which has puzzled scientists for some years.

It is a type of RNA, a single strand of genetic information copied from the DNA of the virus. In other viruses, these RNAs make proteins that are useful to the virus, but in herpes, this was not the case.

The Duke University team suspected that it somehow helped keep the virus in its dormant state, and studied what happened to these “latent RNAs” in mice.

They found they were broken down into even smaller strands, called microRNAs, and these appeared to block the production of proteins which reactivated the virus.

Effectively, they were helping keep the virus in its dormant state.

Professor Bryan Cullen, who led the research, said: “We have provided a molecular understanding of how HSV-1 hides and then switches back and forth between the latent and active phases.”

He said a drug based on blocking these microRNAs could in theory “wake up” all the viruses, making them vulnerable to antiviral therapy, and raising the possibility of a cure for herpes.

Professor Roger Everett, a Medical Research Council virologist based in Glasgow, said that the research represented a step forward in a “long-standing problem” in the field.

The next step, he said would be to see what happened in an animal using a virus engineered to block production of these RNAs.

Sources: BBC NEWS.July 2 ’08

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