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West Nile Hits Western U.S. Hard, While Northeast Unscathed

 

September 27, 2004 09:03:01 AM PDT , HealthDay

 

By E.J. Mundell
HealthDay Reporter

 

MONDAY, Sept. 27 (HealthDayNews) -- The vast majority of West Nile infections this year have occurred in West Coast and Rocky Mountain states, with almost no human infections recorded in the densely populated Northeast, where the virus first took hold five years ago.

Overall, there have been just 10 cases of human infection with West Nile virus recorded this season from Maine to Washington, D.C. Some states -- Delaware, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island and Vermont -- have failed to record one case, according to new statistics from the U.S. Centers for Disease Control and Prevention.

That compares to 507 cases recorded in California so far this year, 355 in Arizona, and 225 in Colorado.

Why this geographic shift west? The answer may lie in a growing immunity to the virus within a key reservoir -- birds, experts suggest.

"Remember, this is an organism that maintains it ability to occasionally infect humans by regularly infecting other animals," explained Dr. Theresa Smith, a medical epidemiologist at the CDC. Those animal "reservoirs" include large mammals such as horses, dogs and deer, but most commonly birds.

Infection with West Nile virus can kill crows and other birds, and those that survive become immune to further infection. Increasing immunity among bird populations in the Northeast may be protecting humans, too, Smith said.

"Essentially, as the virus finds a new place to live, it at first causes a lot of infection. We've seen that all across the United States -- wherever the virus is new, that's where we've always seen the most numbers," she said. That would explain high rates of infection on the West coast, which has only recently been introduced to the virus.

Back in the Northeast, however, bird and animal populations appear to have steadily gained immunity against the pathogen, Smith said.

That pattern seems to be emerging in the Midwest as well, where states such as Indiana (three cases), Michigan (five cases) and Ohio (three cases) have gotten off relatively lightly this year.

Southern states have seen moderate caseloads -- according to the CDC; Florida has identified 31 cases this year, Louisiana 34, and Texas 52.

Overall, CDC officials say there have been 1,604 human cases of West Nile virus infection recorded so far in 2004 across the country. In the contiguous United States, only Washington state has remained free of either animal or human infection.

Other factors may be keeping infection rates to near zero in the Midwest and Northeast, experts say.

The virus lurking inside mosquitoes is most active in hot weather, "and we've had a relatively cool summer here," said Dr. Annie Fine, an epidemiologist with the New York City Department of Health and Mental Hygiene. The first case of West Nile virus infection ever recorded in the United States occurred in New York City in 1999.

Fine credits some of her city's success against the virus to its targeted mosquito-control program, which uses mosquito and bird surveillance to prioritize specific neighborhoods for larvacide and pesticide-spraying efforts.

"Here in New York City we have a very aggressive program," Fine said. "We've also done a lot of work to educate people to remove standing water from their properties."

However, just because the city recorded only one case of human West Nile virus infection this year doesn't mean mosquito-control efforts can be relaxed, Fine said.

"Although this summer we have had what seems to be a low number of cases, we just don't know -- next year could be different, it's difficult to predict what this virus will do," she said. In terms of bird immunity, she pointed out "there are always [new] birds migrating in from other places, and of course young birds being born, that aren't immune."

As birds, other animals and even humans become more immune to the virus, a similar drop in cases might occur later in states such as California or Colorado that were hit so hard this year, Smith said. "It could happen even next year. Especially if they happen to have a very cool, dry year next year --- they may not have many infections."

Approximately 80 percent of people who are infected with West Nile virus will not show any symptoms. Up to 20 percent of people will display symptoms that can include fever, headache, body aches, nausea and vomiting. Those most vulnerable are people over 50 years old, according to the CDC.

More information

For more on how you can protect yourself from the West Nile virus, visit the Centers for Disease Control and Prevention.

 

Alternative Medicine Slips Into the Mainstream

 

September 25, 2004 06:02:13 AM PDT , HealthDay

 

By Holly VanScoy
HealthDay Reporter

 

SATURDAY, Sept. 25 (HealthDayNews) -- In medical circles, what was once considered either old-fashioned or "far out" is getting another look. And sometimes that new look can bring about different ways to treat diseases and conditions.

According to a nationwide survey done in 2002 and published in May by the U.S. Centers for Disease Control and Prevention, more than one-third of American adults had used at least one form of complementary or alternative medicine ( CAM ) in the previous 12 months. The study defined CAM in terms of 27 diverse medical and health-care systems, approaches, practices and therapies that are not currently used in many conventional medical settings in the United States.

Although the name CAM is applied to a wide range of treatment and diagnostic techniques currently outside of traditional medicine in this country, it may be used in conjunction with conventional medicine (thus the name "complementary"), or it could be complete systems (thus the name "alternative"), like traditional Chinese medicine.

Many of these techniques have deep historical and intellectual roots in the cultures of other countries and have been around for hundreds, if not thousands, of years. In fact, for more than 70 percent of the world's population, they are not "alternative," but the primary approach to health care, according to the University of Maryland School of Medicine.

For Americans, CAM approaches include provider-based therapies, like acupuncture; chelation therapy (removing a heavy metal like lead from the bloodstream); hypnotherapy and chiropractic. There are also therapies that do not require a provider, such as use of herbs or botanical products, special diets, megavitamin therapy, and meditation and prayer focused on health or medical conditions.

Overall, the CDC survey showed that CAM use in the United States is highest among women, educated people, individuals who have recently been hospitalized and former smokers.

The most common conditions for which CAM is used include back problems, colds, neck problems, joint pain or stiffness, and anxiety or depression.

Practitioners of both alternative and traditional medicine agree that the blending of the two disciplines is becoming more accepted.

Dr. Allan Magaziner, an osteopath who runs the Magaziner Center for Wellness in Cherry Hill, N.J., believes the trend has just begun.

"The move to embrace alternative and complementary therapies is gaining momentum," said Magaziner. "It's being driven by a public with access to more health, wellness and medical information than ever before, in part, because of the amount of content available on every conceivable condition, illness or medical concern around the clock" on the Internet.

"Women and men are asking their doctors questions about the CAM practices they've read about and discussed with others on the Internet," Magaziner added. "Access to this information is driving a new consideration and integration of many approaches that until very recently were considered by doctors to be fads or frills. Doctors can't ignore these queries, because they hear them every day, from patients of all types."

One alternative procedure that Magaziner believes is effective is chelation therapy. "Chelation therapy saved my parents' lives," he insisted.

Chelation therapy uses an intravenous (IV) approach to introduce a man-made amino acid into the bloodstream. According to Magaziner, the therapy is a proven method to remove heavy metals, such as lead, from the body, and it may also be useful in treating heart disease. His clinic is among 80 sites nationwide involved in a $30 million clinical trial sponsored by the U.S. National Institutes of Health to determine if chelation therapy actually has a positive effect on cardiac functioning.

Dr. Keith Berkowitz, who is medical director at the Center for Balanced Health in New York City, said many conventional physicians are becoming more open to alternative and complementary therapies even before clinical trials have fully confirmed their value.

He points to the availability of acupuncture in many hospitals, along with the widespread use of massage. And, said Berkowitz, the integration of supplements and herbs with diet and prescription medication is a sign of the shift that's under way to meld once-marginal therapies with mainstream medical techniques.

"When I was in medical school, I learned close to zero about nutritional approaches, herbal medicine, vitamins or minerals," Berkowitz said. "When I first saw patients in the hospital who were taking vitamin C, it scared me. I didn't know whether it was good or bad for them.

Berkowitz views his profession as increasingly open to and accepting of CAM therapies and approaches.

"Nutritional supplements -- such as glucosamine and chondroitin (substances to help with damaged cartilage that are now in government clinical trials) -- and vitamin therapies have become first-line treatments for medical conditions," he said. "There also is increasing coverage of CAM in mainstream medical journals, as well as in newspapers and magazines and online Web sites accessible to everyone."

Berkowitz also believes the 2002 CDC study may have understated CAM's impact.

"I estimate that close to 80 percent of Americans are using something that until very recently would not be considered as a conventional approach to a disease or health condition," he said. "This includes dietary approaches, as well as vitamin and mineral supplements, massage and many other CAM practices that are becoming too widely used and integrated into mainstream practice to be considered 'alternative.' "

In fact, many CAM practitioners have recently adopted a new name -- "integrative medicine" -- to describe their diverse therapies and approaches.

More information

Find out more about integrative medicine at the University of Maryland School of Medicine's Center for Integrative Medicine.

 

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(HealthDayNews) -- Here are the latest clinical trials, courtesy of CenterWatch: Bone Metastases A research study to determine if Radiofrequency Ablation (RFA) reduces the pain of metastatic bone tumors in patients who have not received adequate pain relief from conventional therapies. Volunteers who have one or two metastatic bone tumor(s) causing pain and whose pain persists when on pain medication may be able to participate.

Here are some of the latest health and medical news developments, compiled by editors of HealthDay: Stem Cells Found to Help Heart, Eyes Stem cells, plagued with political controversy because they are harvested from human embryos, have found separate experimental uses in helping the heart and eyes, the Washington Post reported Monday.

(HealthDayNews) -- When Tabby scratches or bites you, don't just dismiss her bad temper. You could get cat scratch disease, a bacterial infection. The condition is caused by Bartonella henselae bacteria, according to the U.S. Centers for Disease Control and Prevention. Warning signs include swollen lymph nodes, especially those around the head, neck and upper limbs. A person with cat scratch disease also may experience fever, headache, fatigue and a poor appetite.

MONDAY, Sept. 27 (HealthDayNews) -- A new type of T-cell that reduces asthma and airway inflammation in mice has been identified by scientists at the Stanford University School of Medicine. This finding reinforces the theory that a lack of regulatory T-cells, known as Tregs, is a prime cause of asthma and allergies.

 

SUNDAY, Sept. 26 (HealthDayNews) -- Now that fall has arrived, fireplace safety has become a burning issue. House fires and carbon monoxide poisoning are serious and potentially deadly dangers that can flare up if your fireplace is poorly built or maintained. Michigan State University thinks it's a hot topic and offers some advice on staying safe while you enjoy the cozy comfort of your fireplace.

 

 

 

 


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