慢性ベリリウム肺発生に関する酸化ベリリウムの純度, 〓焼温度の影響について

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Among various beryllium (Be) compounds, beryllium oxide (BeO) has so far been noted as a causative substance which introduce chronic pulmonary berylliosis. In our study, chronic pulmonary berylliosis was experimentally evoked by using two species of BeO with individual purity and fired temperature (A group: 95.O% in purity, and 1,300℃ or above in fired temperature, B group: 99.9% in purity, and 800-1,000℃ in fired temperature), and demarcation of prepared Be concentration involving in the genesis of the disorder was examined. BeO with various concentrations ranging from 200 μg to 0.1 μg were mixed with 0.1% agar solution and infused into right thorax cavity of male guinea pig, following which variation of the body weight was checked and pulmonary histo-pathological findings, peripheral hematological tests, and sero-biochemical tests were carried out on a periodical basis at 8 weeks, 16 weeks, and 32 weeks. The results obtained are outlined herein. 1) Body weights of test animals in both A group and B group were significantly decreased as compared with that of the control. 2) Pulmonary histo-pathological findings revealed the genesis of epitheloid-cell granuloma in the lungs where non-infusion sides were included, which resembled to non-caseating granuloma in the human pulmonary berylliosis. 3) The frequency in the genesis of epitheroid-cell granuloma was 1/36 (2.8%) in A group and 4/35 (11.4%) in B group, granuloma formation being marked in the latter. 4) Examination of the frequency in terms of BeO dosages revealed no results suggesting the dose-response relationship between pulmonary granuloma formation and the dosage. 5) There were no changes worthy of note in peripheral hematological tests. 6) Sero-biochemical tests revealed that alkaline phosphatase value together with total protein in each was significantly decreased in B group at 32 weeks following the infusion.
社団法人日本産業衛生学会の論文
1983-03-20

慢性ベリリウム肺発生に関する酸化ベリリウムの純度, 〓焼温度の影響について

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