{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,27]],"date-time":"2025-09-27T22:04:09Z","timestamp":1759010649646},"reference-count":63,"publisher":"American Society for Microbiology","issue":"11","license":[{"start":{"date-parts":[[2002,6,1]],"date-time":"2002-06-01T00:00:00Z","timestamp":1022889600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Virol"],"published-print":{"date-parts":[[2002,6]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>CHAT and Cox type 1 live-attenuated poliovirus strains were developed in the 1950s to be used as vaccines for humans. This paper describes their characterization with respect to virulence, sensitivity for growth at high temperatures, and complete nucleotide and amino acid sequences. The results are compared to those for their common parental wild virus, the Mahoney strain, and to those for two other poliovirus strains derived from Mahoney, the Sabin 1 vaccine strain and the mouse-adapted LS-a virus. Analysis of four isolates from cases of vaccine-associated paralytic poliomyelitis related to the CHAT vaccine revealed genetic and phenotypic properties of the CHAT strain following replication in the human gut. CHAT-VAPP strain 134 contained a genome highly evolved from that of CHAT (1.1% nucleotide differences), suggesting long-term circulation of a vaccine-derived strain in the human population. The molecular mechanisms of attenuation and evolution of poliovirus in humans are discussed in the context of the global polio eradication initiative.<\/jats:p>","DOI":"10.1128\/jvi.76.11.5339-5349.2002","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T10:09:29Z","timestamp":1027764569000},"page":"5339-5349","update-policy":"http:\/\/dx.doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":20,"title":["Characterization of CHAT and Cox Type 1 Live-Attenuated Poliovirus Vaccine Strains"],"prefix":"10.1128","volume":"76","author":[{"given":"Javier","family":"Marti\u0301n","sequence":"first","affiliation":[{"name":"Division of Virology, National Institute for Biological Standards and Control, Potters Bar, Hertfordshire, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philip D.","family":"Minor","sequence":"additional","affiliation":[{"name":"Division of Virology, National Institute for Biological Standards and Control, Potters Bar, Hertfordshire, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.97.1.73"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1651-2227.1966.tb08813.x"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1128\/jvi.69.8.4972-4978.1995"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0092-1157(78)80010-9"},{"key":"e_1_3_2_6_2","unstructured":"Cabasso V. 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