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Two-dimensional antigenicity profiling of Pgp3 antigens representing LGV, STI, and trachoma demonstrated differential antigenicity using antigen-specific murine sera, but geometric distances were not considered significant (\u22642-fold) for human infection sera. Pgp3 should be considered a single serotype for the purposes of Ct serosurveillance.<\/jats:p>","DOI":"10.1093\/infdis\/jiag067","type":"journal-article","created":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T12:41:01Z","timestamp":1769776861000},"page":"e1124-e1129","source":"Crossref","is-referenced-by-count":0,"title":["Influence of\n                    <i>Chlamydia trachomatis<\/i>\n                    Sequence Variation on pgp3 Antigenicity"],"prefix":"10.1093","volume":"233","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-3507-6568","authenticated-orcid":false,"given":"Filomeno Coelho","family":"da Silva","sequence":"first","affiliation":[{"name":"Virus Reference Department, Public Health Microbiology Division, UK Health Security Agency , London ,","place":["United 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