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Viral antigen was expressed in PLC\/PRF\/5 cells 28 days after infection with cell culture\u2010adapted HAV, and 50 days after infection with virus from human stool. In human fibroblasts the periods until first expression of viral antigen were 90 and 210 days, respectively. During further passages of HAV in fibroblasts the time of first appearance of antigen decreased to about 28 days. Biophysical properties of HAV extracted from infected fibroblasts were comparable to those of HAV derived directly from human stool. Immunofluorescence studies showed that the antigen was located exclusively within the cytoplasm of the infected fibroblasts. Kinetics of antigen production indicated that an equilibrium between virus multiplication and cell metabolism was reached in persistently infected fibroblasts.<\/jats:p>","DOI":"10.1002\/jmv.1890070308","type":"journal-article","created":{"date-parts":[[2007,3,2]],"date-time":"2007-03-02T02:11:45Z","timestamp":1172801505000},"page":"233-239","source":"Crossref","is-referenced-by-count":38,"title":["Propagation of hepatitis A virus in human embryo fibroblasts"],"prefix":"10.1002","volume":"7","author":[{"given":"Verena","family":"Gauss\u2010M\u00fcller","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gert G.","family":"Fri\u00f6sner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Friedrich","family":"Deinhardt","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,12,6]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"109","volume-title":"Hepatitis B Virus and Primary Hepatocellular Carcinoma","author":"Deinhaidt F","year":"1981"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF02121807"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/jmv.1890010303"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF01642154"},{"key":"e_1_2_1_6_1","doi-asserted-by":"crossref","first-page":"216","DOI":"10.1128\/jvi.37.1.216-225.1981","article-title":"Restricted replication of human hepatitis A virus in cell culture: Intercellular biochemical studies","volume":"37","author":"Locarnini SA","year":"1981","journal-title":"Journal of Virology"},{"key":"e_1_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.3181\/00379727-160-40422"},{"key":"e_1_2_1_8_1","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1128\/jvi.26.1.40-47.1978","article-title":"Characterization and classification of virus particles associated with hepatitis A. 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