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Treatment May Prevent Wheezing in Pre-Term Babies

But preventing respiratory synctial virus comes with a hefty price tag
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WebMD News from HealthDay

By Serena Gordon

HealthDay Reporter

WEDNESDAY, May 8 (HealthDay News) -- Many pre-term babies suffer recurrent episodes of wheezing. Now, researchers say a common infection is a likely culprit and they may be able to prevent the breathing problems.

Wheezing episodes in late pre-term babies often are caused by infection with the respiratory synctial virus (RSV), the researchers said. And they've found that injections of an expensive RSV medication can prevent the virus -- and the wheezing.

A study of more than 400 babies born late pre-term (between 33 and 35 weeks' gestation) found that days with wheezing dropped by more than 60 percent among those who received injections of palivizumab during RSV season. The effect lasted even after treatment ended.

"In pre-term babies, RSV illnesses seem to be a risk factor for wheezing, and this treatment reduced that risk," said Dr. Robert Lemanske Jr., a professor of pediatrics and medicine at the University of Wisconsin School of Medicine and Public Health, in Madison. Lemanske wrote an editorial accompanying the new study, which was published May 9 in the New England Journal of Medicine.

RSV is a global health threat in the first year of life and the second leading cause of death after malaria, said study lead author Dr. Louis Bont, a pediatric infectious disease specialist at the University Medical Center Utrecht in the Netherlands.

"The risk of hospitalization for RSV bronchiolitis in otherwise healthy late pre-term [babies] is 5 percent," Bont said. "For other pre-terms, it is higher. About half of all otherwise healthy late pre-terms develop wheezing illness."

RSV-related wheezing reduces quality of life, and it has been linked to the development of asthma, Bont said. It's not yet clear if using palivizumab to prevent RSV will lower rates of asthma, he added.

RSV season lasts about four to five months during the fall, winter or spring, but the exact timing in the United States varies by region, according to the U.S. Centers for Disease Control and Prevention. There is no vaccine for the virus, which causes only mild symptoms in adults and older children.

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