STUDIES ON BOVINE ENTEROVIRUSES : IV. NEUTRALIZING ANTIBODIES IN THE KYUSHU DISTRICT

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  • 牛のエンテロウイルス : IV. 中和抗体の分布
  • ウシ ノ エンテロウイルス 4 チュウワ コウタイ ノ ブンプ

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During a period from 1960 to 1963, a total of 568 serum samples were collected from209 cattle>70 swine>120 goats>28 dogs>and 186 persons in the Kyushu district. Theywere tested for the presence of neutralizing antibodies against two types of bovine entero-viruses which had been isolated from the feces of apparently healthy cattle in Japan. A testwas considered positive when the antibodies in the serum tested neutralized 100 TCID../... mlof viruses in a dilutiorr of l : 10.I. Neutralizing antibodies against type I and type II viruses were found in 93.8 and68.8%, restcectivelv>of the bovine serum samtcles collected from Kurnamoto Prefecture, in33.3 and 0.9% of those collected frorm [VIiyazaki Prefecture>and 66.7 and 43.3% of thosecollected from Saga Prefecture.2. Antibodies against type I and type II viruses were found in 35.7 and 56.3%, respectively, of the swine serum samples collected from Kumarnoto Prefecture and 66.0 and77.8% of those from Oita Prefecture.3. Positive tests with type I and type II viruses were given by 25.0 and 22.5%, respectively, of the goat serurn samples collected from Kumamoto Prefecture.4. No demonstrable antibodies were found in 28 dogs collected from KurnamotoPrefecture.5. Type I and type II viruses were neutralized by 78.5 and 94.3%, respectively, ofthe human sera collected in Kumamoto Prefecture.6. Positive reaction to these viruses was shown by cattle kept in Aso County, Kumamoto Prefecture, where the viruses had been isolated, at 21 final dilution of I : 160 to1 : 640, and by those kept in another county of the same prefecture at a dilution of 1 : 20to 1 : 160.7. In this survey>bovine, hunnant and swine sera frequently>and goat serum occasion=ally, reacted with bovine enteroviruses, because of the presence of neutralizing antibodies.8. No inhibitory activity upon the two types of bovine enLerovirttses was found in thebovine, goat, swine, and human sera examined.

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