著者
小野 浩二 伊藤 挙 窪山 泉 大木 幸子 椛沢 靖弘
出版者
日本保健科学学会
雑誌
東京保健科学学会誌 (ISSN:13443844)
巻号頁・発行日
vol.7, no.1, pp.35-41, 2004-06-25 (Released:2017-10-27)

東京都の総死亡の月別変動を見ると,1月に極大値を持ち,6〜9月に極小値をとる1年を周期とした明らかな季節変動が認められた。4つの疾患群(悪性新生物,心疾患,脳血管疾患の3大死因及びそれ以外の死因)の中で,心疾患,脳血管疾患,その他の疾患の3群ではほぼ同一の季節変動が認められた。悪性新生物の季節変動は他の疾患群より小さかった。主成分分析を行うと,4つの疾患群に共通した季節変動を表すと見なされる第1主成分と,主に悪性新生物に関係した長期に亘って漸増する第2主成分とが抽出された。第1主成分は全死亡の変動の分散の75.6%を説明した。第1主成分の1月の極大値は年によって大きく異なった。インフルエンザによる死亡の年による増減と第1主成分のピーク値の増減とは明らかな相関が認められた。
著者
高岡 正敏 石井 明 椛沢 靖弘 大内 忠行
出版者
日本衛生動物学会
雑誌
衛生動物 (ISSN:04247086)
巻号頁・発行日
vol.28, no.2, pp.237-244, 1977-06-15 (Released:2016-09-05)
被引用文献数
11 9

The house dust mite has been incriminated as a major allergen of house dust in respiratory allergic diseases. Surveys were undertaken to study the mite fauna in house dusts collected from the residence of asthmatic as well as of non-asthmatic children living in and around Tokyo. House dusts were collected by electric sweeper for a week and stored in a deepfreezer until the observation. Mites were isolated from the fine dust caught on a 200 mesh sieve by flotation and centrifugation method with Darling's solution (equal volume of glycerin and saturated sodium chloride solution). Of 24 samples collected in summer, number of mites varied greatly and the average number was 499 in 0.5g of fine dust or 133 per square meter of floor. As to the mite fauna, Pyroglyphidae constituted 85%, Tyroglyphinae 3.1%, Glycyphaginae 1.3%, Cheyletidae 2.8%, Tarsonemidae 0.7%, Mesostigmata 1.3%, and Oribatei 4.4%. Among Pyroglyphid mites, Dermatophagoides pteronyssinus constituted 36% and D. farinae 39% but no significant difference was noted statistically as to the dominancy between the two. Of 9 cases, seasonal change of mite fauna was studied. The number of mites decreased in winter but no statistical difference was found among seasons. Neither the changes in dominant species were noted. Eleven control dust samples were collected from houses without asthmatic patients but no significant difference was noted in number of mites or density per square meter from those observed in the residences of asthmatic children. Mite fauna was also similar to that in the asthmatic houses.