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Health authorities Wednesday pointed the finger at sterilizers for humidifiers as a possible cause of an unidentified lung disease that resulted in the deaths of some pregnant women earlier this year. While more detailed studies are planned, the authorities advised people not to use sterilizers and asked the cleansing item makers to take the products off the shelf until the final research result comes out. Officials of the Korea Center for Disease Control and Prevention said they presume sterilizers used to clean humidifiers caused the unidentified lung damage. They conducted research on 18 patients who were in a Seoul hospital for the disease and 121 people who were also there due to other respiratory ailments as controls. 밫he study showed those using sterilizers had 47.3-time higher chance of getting the unidentified lung ailment than those not using such products,?a center official said in a news briefing in Seoul. Humidifier sterilizers are liquid- or tablet-type chemical products which are put in the water of humidifier tanks to prevent germs or mould. Those patients used humidifiers for four months per year on average for the last three to four years, and they put sterilizers in the water every time they refilled, the authorities said. They used about one bottle of sterilizer per month. Researchers also carried out an experiment where human lung cells were cultivated in controlled conditions, and found some products damaged the cells. But the experiment was carried out under different conditions from actual living conditions, they added. 밯e can say the sterilizers are highly likely to have caused the lung damage, but can뭪 conclude that they were the direct cause. So we will conduct additional research for at least three months,?the official said. Materials used in those sterilizers are also used in other products such as cosmetics, wet tissues and shampoos, but the officials said people consume much larger amount of the material when inhaling them than having them absorbed through skin. On the more frequent affect among pregnant women or those just having given birth, they suspected it is because many of such women use the sterilizers for themselves or their newborns. Even though additional studies are needed, the authorities advised people to refrain from using humidifier cleansers until the final results are out. They also asked producers not to sell their items, and the makers decided to recall them and delay making new products. According to the authorities, a total of 28 people have had the disease since 2004, with 16 of them incurring it this year. Of them, 24 were women, and 13 among them were pregnant. In April and May, eight cases were reported ?seven women in their 20s and 30s who gave birth or were expecting soon and a man in his 40s. Four of the female patients died after a rapid development of pulmonary fibrosis. Three others were in critical condition with the same symptoms, but overcame them through lung transplantation.
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| rahnita@koreatimes.co.kr |