Passive Smoke Increases Meningococcal Disease Risk in Kids

by Sheela Philomena on  December 9, 2010 at 2:53 PM Child Health News
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A new study has revealed that children exposed to second-hand smoke are more prone to invasive meningococcal disease than children who are not exposed.
 Passive Smoke Increases Meningococcal Disease Risk in Kids
Passive Smoke Increases Meningococcal Disease Risk in Kids

Researcher Chien-Chang Lee and his colleagues at the Harvard School of Public Health also found a possible association of second-hand smoke exposure with invasive pneumococcal disease and Haemophilus influenzae type b.

By reviewing and analyzing published studies (30 case-control and 12 cross-sectional studies, mostly conducted in high-income countries with good vaccination policies), the researchers used the findings of all studies that had compared the occurrence of invasive bacterial disease in children exposed to second-hand smoke with its occurrence in children who are not exposed.

They found that exposure to second-hand smoke doubled the likelihood of invasive meningococcal disease (with a total odds ratio for second hand smoke exposure of 2.02).

Although there was an increase in the risk of developing invasive pneumococcal disease and Haemophilus influenzae type b, this increase could not be distinguished from chance finding, because a relatively small number of studies were available.

However, nasal carriage of N. meningitidis (which causes meningitis) and S. pneumoniae in children exposed to second-hand smoke was significantly increased compared to those who were not exposed.

The effects were generally stronger in the youngest children, those below 6 years of age, who are more vulnerable.

The results suggested that by decreasing children's exposure to second-hand smoke, for example by parents stopping smoking or not smoking at home, deaths and illness caused by invasive bacterial diseases could be reduced.

Such a reduction would be particularly beneficial in poor countries, where vaccination against invasive bacterial diseases is low.

"Because the burden of invasive bacterial disease is highest in developing countries where second-hand smoke is increasing, there is a need for high-quality studies to confirm these results, and for interventions to reduce exposure of children to second-hand smoke," concluded the researchers.

The study is published in the current issue of PLoS Medicine.

Source: ANI

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