New York: Dust blown from faraway deserts may accumulate in the air to levels great enough to contribute to children`s asthma attacks, a new study suggests.It`s well established that poor air quality can worsen symptoms in people with asthma or other lung disease, and children are thought to be particularly susceptible due to factors like their smaller airways and less developed immune systems.One recent study in the Atlanta area found that on days where levels of ozone and certain traffic pollutants were highest, the rate of children`s ER visits for asthma attacks also rose.
During that same time frame, 620 children between the ages of 1 and 15 were hospitalised for an asthma exacerbation. In general, children`s risk of being hospitalised was 88 percent higher on a heavy-dust day compared with other days, and similarly elevated during the week following a major dust event.The findings, reported in the American Journal of Respiratory and Critical Care Medicine, do not prove that the desert dust itself caused excess asthma attacks.But the researchers did account for levels of pollen and air pollutants like nitrogen dioxide and small particles other than mineral dust, and the link between desert dust and asthma hospitalisations remained.Because there were only a handful of heavy-dust days during the study period, only a small number of asthma hospitalizations would be attributable to the air-quality condition, noted lead researcher Dr Kumiko T Kanatani, of the Kyoto University Graduate School of Medicine in Japan.However, in parts of the world more affected by desert dust, such days may be a more important contributor to children`s asthma exacerbations, Kanatani told Reuters Health by email.For parents of children with asthma, the findings underscore the importance of keeping an eye on local air quality, according to Kanatani.While there may be no advisories on desert dust specifically, levels of so-called particulate matter -- especially "coarse" dust particles known as PM10 -- also rise on heavy-dust days, Kanatani noted.And levels of particulate matter are monitored and included in local air-quality indices -- which, in the US, are those colour-coded systems used to alert the public as to whether the day`s air quality is "good," "moderate," unhealthy for people with lung disease or other chronic conditions, or potentially unhealthy for all.According to Kanatani, a hazy sky is a good initial clue that levels of particulate matter are high that day, and it may be a good idea to limit asthmatic children`s time outdoors. But parents can also go online to check local PM levels, the researcher noted.Bureau Report
High voter turnout in 5th phase of Lok Sabha polls
FIR against Misa for disturbing poll process
RCB play hard and party hard too: Mallya
Ananth Kumar calls Congress a non-performer across India