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Mayo Clinic Proceedings Article Offers New Data About the Impact of the Shingles Virus on Healthy Adults
Date:12/12/2007

ROCHESTER, Minn., Dec. 12 /PRNewswire-USNewswire/ -- When a vaccine to prevent shingles was approved for use in 2006, the Food and Drug Administration recommended the vaccine for people age 60 and older who previously had chickenpox. But two issues -- the vaccine's cost and the perception that shingles primarily affects adults with weakened immune systems -- have left some physicians undecided about whether healthy adults need the vaccine. This uncertainty prompted a group of researchers led by Barbara Yawn, M.D., of Olmsted Medical Center in Rochester, to gather new data about the incidence and impact of shingles in unvaccinated patients.

Published in the November issue of Mayo Clinic Proceedings, Dr. Yawn's research findings suggest that shingles and the complications associated with it may have a greater impact upon healthy adults than most physicians previously assumed.

"The best way to make a decision about who we should vaccinate is by gaining a better understanding about the true impact of this virus," notes Dr. Yawn. "Physicians have access to very few recent studies that tell us how many people in the United States get shingles, what age groups the virus affects most, and how many of these people go on to develop related complications or other problems."

Study rationale and findings

Shingles isn't a life-threatening condition, but it can cause a painful rash or band of blisters during an outbreak and other painful complications that can persist for months or even years. The goal of this study was to establish accurate, up-to-date data about the incidence and impact of shingles in the United States before the vaccine was introduced. Dr. Yawn and her team recorded the number of adult residents of Olmsted County, Minn., who were diagnosed with shingles and shingles-related complications from Jan. 1, 1996, to Dec. 31, 2001. Over the course of the study, 1,669 patients were included.

Researchers calculated that shingles affects at least 1 in every 278 adults in the United States each year. Study data also showed that shingles is even more common among people ages 50 to 59, affecting about one in every 24 people each year.

"Overall, our data suggests that researchers and physicians also need to consider preventing shingles in people ages 50 to 59," says Dr. Yawn. "Future research is needed to understand the risk of recurrence of shingles to better advise people who previously had shingles about the value of receiving the shingles vaccine."

Dr. Yawn noted that study data also challenged the assumption that shingles primarily affects adults with weakened immune systems.

"More than 92 percent of the study subjects with shingles did not have any conditions like cancer or other serious illnesses that affected their immune system," says Dr. Yawn.

Post-herpetic neuralgia was the most common complication noted, occurring in about 8 percent of all people and increasing with age. This sometimes debilitating complication causes the skin to remain painful and sensitive to touch for months or even years after the rash clears up.

"About 18 percent of people age 80 or older experience pain that lasts more than 90 days beyond the shingles," explains Dr. Yawn.

About shingles

Also known as herpes zoster, shingles is an infection caused by the varicella-zoster virus, the same virus that causes chickenpox. Anyone who has had chickenpox can develop shingles because some of the virus lies inactive in the nerves and can reactivate as shingles. Shingles is associated with a painful rash or band of blisters that affects a limited area of the body, most commonly the trunk, wrapping from the middle of the back and around one side of the chest to the breastbone. Alternatively, the painful rash may affect the face, scalp or neck or occasionally an arm or leg. Complications that affect about one in every five people with shingles include infection of the eye and damage to the nerve to the eye, which can result in decreased vision. In rare cases, shingles can also cause temporary muscle weakness or paralysis on the side of the face affected by the virus.

The shingles vaccine (Zostavax) can prevent shingles in about 61 percent of those vaccinated. In vaccinated people who develop shingles, the vaccine typically reduces the severity of the outbreak and the risk for developing post-herpetic neuralgia.

A peer-review journal, Mayo Clinic Proceedings publishes original articles, reviews and editorials dealing with clinical and laboratory medicine, clinical research, basic science research and clinical epidemiology. Mayo Clinic Proceedings is published monthly by Mayo Foundation for Medical Education and Research as part of its commitment to the medical education of physicians. The journal has been published for more than 80 years and has a circulation of 130,000 nationally and internationally. Articles are available online at http://www.mayoclinicproceedings.com.

To obtain the latest news releases from Mayo Clinic, go to http://www.mayoclinic.org/news. MayoClinic.com (http://www.mayoclinic.com) is available as a resource for your health stories.


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SOURCE Mayo Clinic
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