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2 0 0 0 クラゲ刺傷によって発症したと考えられた納豆アレルギーの1例

著者: 木下ひとみ中村吏江幸絢子天野愛純香白石剛章森本忠雄
出版者: 医学書院
雑誌: 臨床皮膚科 (ISSN:00214973)
巻号頁・発行日: vol.73, no.11, pp.863-867, 2019-10-01

要約 62歳,男性.賞味期限切れの納豆を摂取し,蕁麻疹と血圧低下を生じた.大豆製品を日常的に摂取し問題ないこと,クラゲ刺傷の既往があったことから,クラゲ刺傷によって生じた納豆アレルギーを疑った.クラゲ刺傷によってポリガンマグルタミン酸(poly-gamma-glutamic acid:PGA)に感作されるが,納豆の粘稠物質にもPGAが含まれており,このPGAは納豆の発酵過程で経時的に増加すると考えられている.そこで賞味期限内および賞味期限切れの納豆,納豆の粘稠物質,大豆の水煮,ミズクラゲ,PGAを用いてプリックテストを施行した.賞味期限切れの納豆,納豆の粘稠物質,PGAで陽性であり,PGAによるアナフィラキシーショックと診断した.PGAは医薬品で使用されるほか,食品や化粧品等広い分野で使用されているため,原因不明のアナフィラキシーでまず疑うことが大切であり,クラゲ刺傷の既往や詳細な食事歴の聴取が重要である.

2 0 0 0 OA <strong>Changes in ice-front position and surface elevation of Pío XI Glacier, an advancing calving glacier in the Southern Patagonia Icefield, in 2000–2018</strong>

著者: 波多俊太郎杉山慎
雑誌: JpGU-AGU Joint Meeting 2020
巻号頁・発行日: 2020-03-13

Glaciar Pío XI, the largest glacier in the Southern Patagonia Icefield (SPI), has advanced over the last several decades in contrast to a shrinking trend of other glaciers in the SPI. The mechanism of the unique behavior is unclear due to lack of detailed observations. To investigate the mechanism of the recent advance of Glaciar Pío XI, we measured ice-front position and glacier surface elevation by using satellite data from 2000 to 2018. Ice-fronts of all separated termini showed advancing trend. The largest advance of 1400 m was observed at the southern main front. Glacier surface elevation increased by 35 m as a mean over the ablation area during the study period, and the rate of elevation change increased by 240% from Period 1 (2000–2007) to Period 2 (2007–2017/18). The rate of elevation change was non-uniformly distributed over time and space; i.e. rapid thickening (~20 m a−1) was observed in a limited area during Period 1, whereas only slightly positive rate (~2.4 m a−1) was observed over the entire region during Period 2. Previous studies reported ice speed deceleration near the southern main front, suggesting decrease in frontal ablation over the study period. Based on satellite image observations from 2000 to 2018, we attribute the deceleration to deposition of sediment and formation of shoal in front of the glacier. In the accumulation area, increase in snow accumulation is reported for a period from 1980 to 2015. Therefore, we propose the reduction in frontal ablation and increase in accumulation as possible mechanisms of the recent advancing and thickening trend of Glaciar Pío XI. Our data illustrate details of advancing despite a retreating trend in adjacent glaciers in Patagonia.