{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T14:09:18Z","timestamp":1792591758956,"version":"4.5.0"},"reference-count":23,"publisher":"American Society for Microbiology","issue":"7","license":[{"start":{"date-parts":[[2007,7,1]],"date-time":"2007-07-01T00:00:00Z","timestamp":1183248000000},"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":["Clin Vaccine Immunol"],"published-print":{"date-parts":[[2007,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            The surface protective antigen (Spa) protein of\n            <jats:italic>Erysipelothrix rhusiopathiae<\/jats:italic>\n            has been shown to be highly immunogenic and is a potential candidate for a new vaccine against erysipelas. In this study, we cloned and sequenced\n            <jats:italic>spa<\/jats:italic>\n            genes from all\n            <jats:italic>E. rhusiopathiae<\/jats:italic>\n            serovar reference strains as well as from a serovar 18 strain which was not classified as any species in the genus\n            <jats:italic>Erysipelothrix.<\/jats:italic>\n            Sequence analysis revealed that the Spa proteins could be classified into three molecular species, including SpaA, which was previously found in serovars 1a and 2, and the newly designated SpaB and SpaC proteins. The SpaA protein is produced by\n            <jats:italic>E. rhusiopathiae<\/jats:italic>\n            serovars 1a, 1b, 2, 5, 8, 9, 12, 15, 16, 17, and N, the SpaB protein is produced by\n            <jats:italic>E. rhusiopathiae<\/jats:italic>\n            serovars 4, 6, 11, 19, and 21, and the SpaC protein is produced only by serovar 18. The amino acid sequence similarity was high among members of each Spa type (96 to 99%) but low between different Spa types (\u223c60%). The greatest diversity in Spa proteins was found in the N-terminal half of the molecule (50 to 57% similarity), which was shown to be involved in immunoprotection. Coinciding with this, immunoblot analysis revealed that rabbit antisera specific to each Spa reacted strongly with the homologous Spa protein but weakly with heterologous Spa proteins. A mouse cross-protection study showed that the three recombinant Spa (rSpa) proteins elicited complete protection against challenge with homologous strains but that the level of protection against challenge with heterologous strains varied depending on the rSpa protein used for immunization. Our study is the first to demonstrate sequence and antigenic diversity in Spa proteins and to indicate that rSpaC may be the most promising antigen for use as a vaccine component because of its broad cross-protectiveness.\n          <\/jats:p>","DOI":"10.1128\/cvi.00099-07","type":"journal-article","created":{"date-parts":[[2007,5,3]],"date-time":"2007-05-03T15:56:58Z","timestamp":1178207818000},"page":"813-820","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":63,"title":["Genetic and Antigenic Diversity of the Surface Protective Antigen Proteins of\n            <i>Erysipelothrix rhusiopathiae<\/i>"],"prefix":"10.1128","volume":"14","author":[{"given":"Ho","family":"To","sequence":"first","affiliation":[{"name":"Nippon Institute for Biological Science, 9-2221-1 Shinmachi, Ome, Tokyo 198-0024, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shinya","family":"Nagai","sequence":"additional","affiliation":[{"name":"Nippon Institute for Biological Science, 9-2221-1 Shinmachi, Ome, Tokyo 198-0024, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1128\/IAI.67.12.6533-6542.1999"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1128\/iai.58.9.3116-3121.1990"},{"key":"e_1_3_2_4_2","doi-asserted-by":"crossref","first-page":"637","DOI":"10.1017\/S0950268800049335","volume":"107","year":"1991","unstructured":"Groschup, M. 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Iowa State University Press, Ames, IA.","journal-title":"Diseases of swine"},{"key":"e_1_3_2_22_2","first-page":"1958","volume":"39","year":"1978","unstructured":"Wood, R. L., D. R. Haubrich, and R. Harrington. 1978. Isolation of previously unreported serotypes of Erysipelothrix rhusiopathiae from swine. Am. J. Vet. Res.39:1958-1961.","journal-title":"Am. J. Vet. 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