Parents, do not be afraid to suck.

That's the advice of a new investigation that, while unpleasant, perhaps literally, depending on where the pacifier was dropped, could protect babies from developing allergies.

The results are presented at the annual meeting of the American College of Allergy, Asthma and Immunology, which will be held until November 19 in Seattle.

Does it sound disgusting?

Perhaps. But mothers who clean their pacifiers by sucking them have babies with a lower allergic response, according to research at Henry Ford Hospital in Detroit.

Video: Leading researcher discusses findings

The study interviewed 128 mothers over a period of 18 months and asked how they cleaned their babies' pacifiers. Of the 74 whose babies used one, 72 percent said they were washed by hand, 41 percent said they were sterilized, and 12 percent said they had salivated the pacifiers.

The scientists found that babies whose mothers had cleansers with spit had lower levels of IgE, an antibody badociated with allergic responses. High levels of IgE usually indicate an increased risk of having allergies Y Allergic asthma.

"We found that the sucking of the parents' pacifier was linked to suppressed IgE levels that started around 10 months and continued until 18 months," said Dr. Edward Zoratti, an allergist and co-author of the study. "More research is needed, but we believe that the effect may be due to the transfer of microbes that promote the health of the parents' mouths."

Do you still that? It was discovered that the spread of germs from the mouth of the parents stimulates the child's immune system.

The research does not prove the cause and the effect, and it is not clear if the lower IgE production observed in these children continues in recent years.

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