Monthly Archive for October, 2008

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Food poisoning often found to be responsible for chronic illnesses

There is a small amount of people who develop longterm health problems due to food poisoning, but their numbers are growing. Medical experts have looked for the source of specific chronic illnesses over the past ten years. According to the Centers for Disease Control and Prevention, these experts have increasingly found links to events of food poisoning, often many years beforehand.

Campylobacter, a bacterium linked to raw chicken, is now identified as a chief cause of sudden acute paralysis known as Guillain-Barre syndrome. Specific strains of salmonella, which is the bacterium involved in the recent outbreak in Mexican raw jalapeno and serrano peppers, can cause arthritis. Also, E. coli O157:H7, a strain of a normally harmless bacterium that lives in animal intestines, can release toxins that can cause hemolytic uremic syndrome, or HUS, a kidney disorder that leads to 25 to 50 percent of cases of kidney failure, high blood pressure and other problems as far off as 10 years later. This is just the start of the many health problems that some people are now associating with food-borne infections.

It is estimated by the CDC that there are 76 million cases of food-borne disease in the U.S. annually. Most of these people experience it only as diarrhea or stomach pain, although an alarming estimation of 5,000 to 9,000 Americans die every year form food poisoning. A small amount of pathogens are accountable for more than 90 percent of these fatalities: listeria, salmonella, noroviruses, toxoplasma, campylobacter and E. coli. Small children, the elderly and those with weakened immune systems are most vulnerable to infection.

For many reasons, the long-term health effects of food-borne infections are difficult to study. It is hard to prove a link between some of these illnesses and later conditions like arthritis and even though there are yearly outbreaks all over the nation, the problem hasn’t received much public attention or funding. In addition, federal health-care privacy laws inhibit researchers from contacting anyone who is not in their direct care.

Because of these laws, STOP is creating a national registry of victims of food-borne disease who would agree to participate in longitudinal studies.

Most of the 76 million cases of food-borne diseases that happen each year in the U.S. cause symptoms like diarrhea and vomiting for the first day or two. It is recommended by the CDC to call your doctor if diarrhea is coupled with a high fever (over 101.5), blood in the stools or extended vomiting that prevents liquids from staying down. A doctor should also be contacted if diarrhea lasts more than three days.

Of course there are things that can be done to reduce the risk of getting food poisoning. Meat and eggs should be cooked thoroughly. Ground beef must reach an internal temperature of 160 degrees and eggs should be cooked until the yolk is firm. Cross contamination can be avoided simply by washing hands, cutting boards and utensils after they have been in contact with raw meat or chicken and before they touch another food. All leftovers should be put in clean containers and refrigerated quickly. Before preparing food, hands need to be washed thoroughly. Remove dirt from fresh fruit and vegetables by running tap water over them and always throw away the outer leaves from a head of lettuce or cabbage.

Breast cancer detection can be aided by computers

New research has indicated that a radiologist using a computer is just as good as two radiologists for finding breast cancer on a mammogram. These computers detect questionable areas on X-rays for a radiologist to take a closer look.

Women are screened using mammograms for early signs of breast cancer, but these tests are not always complete. Usually in the U.S., one radiologist  reads the X-ray, and cancers are occasionally missed.

CAD, or computer-aided detection, was created to aid radiologists in finding more cancers. These computer programs, which were approved ten years ago, are used for around a third of the nation’s mammograms, but the importance and precision of the technology is being debated.

In Britain, mammograms are normally checked by two radiologists or technicians, which is obviously thought to be superior than one review. Some researchers wanted to find out if a single expert, assisted by a computer, could detect as well as two people. British researchers studied the mammograms of 31,000 women.

It was found that computer-aided detection found almost the same amount of cancers, 198 out of 227, compared with 199 for the two readers.

In countries like the U.S., computer-aided detection could increase the cancer-detection rates to the level achieved by double reading. What was found was that one reader using CAD can locate as many cancers as two readers can.

It is recommended by the U.S. government that beginning at age 40, women should get mammograms every one or two years. Authorities say that there are not enough radiologists to perform two readings, and a second look is not paid for by insurers, but Medicare pays an additional $15 for computer-aided detection.

That extra money has helped start these computer checks. More places are expected to use them as they change to digital images form film X-rays, which cuts out a step in the process. 

This research was funded by the British government and a charity called the Cancer Research UK.