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アレルギー疾患:昔と今の差違  

2016-07-27 20:13:50 | 日記
 アレルギー、とりわけアトピーが、日本ではここ10-20年間、大きな問題である。医師たちは、原因が特定できない。大気汚染、ハウスダスト、食物等の複合原因。昔は、あまりアレルギーがなかった。例えば、誰かが「玉子を食べたので目がかゆい。」と言う。聞いたのは、そんな程度。アレルギーに関し、昔と今の差違を検討したい。
 (1)大気汚染:昔は空気がきれいだった。しかし今、公害規制が前進したとはいえ、自動車の排ガス、工場排煙がとりわけ膨大に増えた。
 (2)新しい化学物質:産業が発展。かくて新しい毒物が極度に増大・蓄積した。それらは土壌汚染、水質汚濁等で至る所に残存する。また新化学物質は様々の物で使われている。例えば中性洗剤、抗菌剤等。
 (3)家屋の密閉性:日本の昔の家屋は多くが木造だった。だから風通しが良かった。しかし今は、家屋は密閉度が高く、エアコンが使われる。その結果、(a)皮膚と粘膜が、風通しの良い部屋で気温の大きな変化があれば強化されるが、そうでないため弱くなった。そのため、アレルギーに苦しむ可能性が高まる。(b)換気が悪いと、ほこり、ダニ、化学物質などアレルギー原因物質が、増える。
 (4)欧米風の食物:日本人は、動物性脂肪・たんぱく質を多く含む欧米風の食物を食べるようになった。動物性脂肪・たんぱく質はアレルギー疾患を引き起こしやすい。
 (5)食品添加物: 広範囲に大量に使われている。例えば、保存料、発色剤、人工着色料、化学調味料、合成香料。
 かくて、日常生活が昔と今では同じでないことが、はっきりした。アレルギーが今日、日本で極めて共通・重大な問題となるのは、当然かつ不可避である。
 
 It is said that allergies, in particular atopy, have become a very common serious problem in Japan over the last 10 to 20 years and that doctors cannot define their causes, which can be a mixture of air pollution, house dust, food, etc. In old days, there were few allergies. For example, someone said, “My eyes itch when I eat eggs.” You heard only such a kind of remark. You try to examine the differences between old and these days in regard to allergies.
 (1)Air pollution: In old days, air was clean. However now particularly, exaust gas from automobiles and smokes from factories have increased enormously though pollution controls have been advanced.
 (2)New chemicals: Industries have developed. Therefore new toxic chemicals have severely increased and accumulated. They are left everywhere still now such as soil contamination, water pollution, and so on. In addition, new chemicals are used in various things, for example, neutral detergent, antibacterial agent, etc.
 (3)Airtightness of houses: Old houses in Japan were mostly made of wood. Then they were drafty. However nowadays houses are airtight and air conditioners are used. As a result, (a) your skin and mucosa have become weak because they are not strengthened by large change of air temperature in drafty rooms. It becomes more likely that you suffer from allergies. (b)Bad ventilation increases allergens such as dust, ticks, and chemicals.
 (4) Western food: Japanese have come to eat more Western food that includes much animal fat and animal protain. The latter cause easily allergic disease.
 (5)Food additives: These are used largely and severely such as food preservatives, color formers, artificial colorants, chemical seasonings, synthetic perfumes.
 Now you realized that the daily lives of old and these days are not equal. It is natural and inevitable that allergies have become a very common serious problem in these days in Japan.

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