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2015年職稱英語考試衛(wèi)生類C級閱讀判斷模擬練習(xí)題5

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Ulcers

Even though ulcers appear to run in families, lifestyle plays more of a role than genetic factors in causing the illness, according to a report in the April 13th Journal of Internal Medicine. In particular, smoking and stress in men and the regular use of pain-releasing medicines in women were linked with an increased risk of developing an ulcer.

Overall, 61% of ulcer risk appears to be due to environmental factors, such as smoking, and the remaining 39% is due to genes according to Dr. Isiha of the University of Turkey and colleagues at the university of Helsinki, Finland. Some researchers had suggested that families may spread Helico-bacteria Pylori (幽門螺旋菌), the bacteria that can cause ulcers. However, the new study suggests this is unlikely, according to the report.

Raiha and colleagues studied data from more than 13,000 pairs if twins “to examine the roles of genetic and environmental factors in the origin of peptic ulcer disease”, they explain. Both twins were more likely to develop an ulcer if the pair were genetically the same as compared with a pair of fraternal twins, suggesting that there must be some genetic susceptibility to ulcer development.

However, the risk was no greater in twins living together compared with twins living apart, suggesting that shared exposure to H. pylori was not to blame. “Environmental effects were not due to factors shared by family members, and they were related to smoking and tress in men and the use of analgesics in women, ” the author wrote. “The minor effects of shared environment to disease liability do not support the concept that the grouping of risk factors, such as H. pylori infection, would explain the genetic factor of peptic ulcer disease,” they concluded.

1.Smoking and stress are very likely causes of ulcer in men.