Previous studies have linked clean homes to weak immune systems.

閱讀難度：

A growing obsession with cleanliness could be making people depressed, according to scientists, the Daily Telegraph reported.

Researchers found that cleaner homes and offices are leaving lower levels of dirt and bacteria that could lead to weaker immune systems and, in turn, brain function being impaired.

The latest study, from Atlanta, suggested that weaker immune systems tend to overreact to dust and dirt in the form of inflammations or allergies that can slow the brain's production of "happy" chemicals such as serotonin and cause depression.

The scientists said the rates of depression are far higher in the developed world than in poorer parts of the planet. （點(diǎn)擊英國(guó)《每日電訊報(bào)》查看原文）

過(guò)度清潔恐導(dǎo)致抑郁

?????? 英國(guó)《每日電訊報(bào)》報(bào)道，科學(xué)家研究表明，過(guò)于講究清潔的環(huán)境可能會(huì)使人抑郁。

?????? 研究者發(fā)現(xiàn)家和辦公室越干凈，灰塵和細(xì)菌也就越少，這可能導(dǎo)致人的免疫系統(tǒng)更脆弱而反過(guò)來(lái)?yè)p害腦功能。

?????? 來(lái)自亞特蘭大的最新研究表明，脆弱的免疫系統(tǒng)容易對(duì)灰塵過(guò)度反應(yīng)，表現(xiàn)為發(fā)炎或過(guò)敏，而這會(huì)降低大腦里“快樂(lè)”因子（比如：血清素）的產(chǎn)生，從而引起抑郁。

?????? 科學(xué)家表示，發(fā)達(dá)國(guó)家的抑郁發(fā)生率遠(yuǎn)高于貧窮的國(guó)家。

(China.org.cn April 20, 2011)