{"title":"弓形虫裂解物抗原免疫小鼠后对弓形虫RH毒株的抑制作用。","authors":"K Yano, T Nakabayashi","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>The virulent RH strain of Toxoplasma gondii was attenuated after a few passages or just one long passage in mice immunized twice with a four-week interval between immunizations with an emulsion of Toxoplasma lysate antigens and complete Freund's adjuvant. Three avirulent strains, RH-cyst III, IV and VIII were established from the RH strain. The RH-cyst III strain was effective for vaccination against challenge with the original, virulent RH strain. The attenuation of T. gondii is an expression of the innate attributes of this parasite necessary to maintain its parasitic life cycle in nature.</p>","PeriodicalId":8767,"journal":{"name":"Biken journal","volume":"29 2","pages":"31-7"},"PeriodicalIF":0.0000,"publicationDate":"1986-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Attenuation of the virulent RH strain of Toxoplasma gondii by passages in mice immunized with Toxoplasma lysate antigens.\",\"authors\":\"K Yano, T Nakabayashi\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The virulent RH strain of Toxoplasma gondii was attenuated after a few passages or just one long passage in mice immunized twice with a four-week interval between immunizations with an emulsion of Toxoplasma lysate antigens and complete Freund's adjuvant. Three avirulent strains, RH-cyst III, IV and VIII were established from the RH strain. The RH-cyst III strain was effective for vaccination against challenge with the original, virulent RH strain. The attenuation of T. gondii is an expression of the innate attributes of this parasite necessary to maintain its parasitic life cycle in nature.</p>\",\"PeriodicalId\":8767,\"journal\":{\"name\":\"Biken journal\",\"volume\":\"29 2\",\"pages\":\"31-7\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1986-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biken journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biken journal","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Attenuation of the virulent RH strain of Toxoplasma gondii by passages in mice immunized with Toxoplasma lysate antigens.
The virulent RH strain of Toxoplasma gondii was attenuated after a few passages or just one long passage in mice immunized twice with a four-week interval between immunizations with an emulsion of Toxoplasma lysate antigens and complete Freund's adjuvant. Three avirulent strains, RH-cyst III, IV and VIII were established from the RH strain. The RH-cyst III strain was effective for vaccination against challenge with the original, virulent RH strain. The attenuation of T. gondii is an expression of the innate attributes of this parasite necessary to maintain its parasitic life cycle in nature.
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