わが国におけるウシ白血病ウイルス感染 : 牛からの抗体およびウイルスの検出

DOI 日本農学文献記事索引 Web Site Web Site PubMed 被引用文献1件

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タイトル別名
  • Bovine leukemia virus infection in Japan: Antibody and virus detection in cattle.
  • わが国におけるウシ白血病ウイルス感染--牛からの抗体およびウイルスの検出〔英文〕
  • ワガクニ ニ オケル ウシ ハッケツビョウ ウイルス カンセン ウシ カラ ノ

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The presence of antibody against bovine leukemia virus (BLV) was examined in dairy and beef cattle in Hokkaido and in the Towada district, Aomori Prefecture, by the immunodiffusion test in 1977 and in 1978, respectively. The percentage of antibody-positive cattle was higher in those cattle than in those observed in the previous survey (8.8% vs. 3.3% in Hokkaido and 44.2% vs. 32.2% in the Towada district), indicating the gradual increase of BLV infection in these parts of Japan. To clarify a relationhsip between the existence of BLV and the presence of antibody against BLV in cattle, syncytium assay (SA) was performed with lymphocytes from cattle with or without BLV antibody. All the cattle with antibody against BLV were positive for SA when bovine splenic cells were used as indicators, whereas 71.4% of them was positive when bovine thymic cells were used as indicators. These results suggest that BLV may be detetced by SA from nearly all the cattle with antibody against BLV when appropriate cells are used as indicators. Fifteen percent of the antibody-negative cattle was positive for SA when bovine thymic cells were used and 17.6% positive when bovine splenic cells were used. Neither plaque nor inclusion body formation was observed in indicator cells which had been inoculated with lymphocytes. These SA-positive, antibody-negative cattle were considered to have been infected with BLV.

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