{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,27]],"date-time":"2025-05-27T17:04:09Z","timestamp":1748365449319},"reference-count":15,"publisher":"BMJ","issue":"6","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Sex Transm Infect"],"accepted":{"date-parts":[[2012,3,25]]},"published-print":{"date-parts":[[2012,10]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>The longitudinal epidemiological development of the new variant of<jats:italic>Chlamydia trachomatis<\/jats:italic>was studied after appropriate testing procedures had been introduced when the strain was detected in 2006.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The number of cases of the new variant of<jats:italic>C trachomatis<\/jats:italic>was followed from 2007 through 2011 from the laboratory records. Testing for<jats:italic>C trachomatis<\/jats:italic>is centralised to one laboratory with around 80\u201385\u2008000 persons being tested annually in a population of 1.1 million.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>During the 5-year period, 410\u2008973 patients were tested of which 25\u2008723 cases were positive. The proportion of the new variant of all positive cases declined from 30% in 2007 to 6% in 2011. While the number of the new variant of<jats:italic>C trachomatis<\/jats:italic>declined, the ordinary wild-type strains remained largely unchanged.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>A selective decline of the new variant of<jats:italic>C trachomatis<\/jats:italic>has occurred after appropriate laboratory testing was introduced. A new balance point between 5% and 10% for the new variant seems to be gradually approached.<\/jats:p><\/jats:sec>","DOI":"10.1136\/sextrans-2011-050409","type":"journal-article","created":{"date-parts":[[2012,4,28]],"date-time":"2012-04-28T02:30:50Z","timestamp":1335580250000},"page":"451-455","update-policy":"http:\/\/dx.doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":12,"title":["Decline of the new Swedish variant of<i>Chlamydia trachomatis<\/i>after introduction of appropriate testing"],"prefix":"10.1136","volume":"88","author":[{"given":"Kenneth","family":"Persson","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Berit","family":"Hammas","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H\u00e5kan","family":"Janson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carina","family":"Bjartling","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joakim","family":"Dillner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lena","family":"Dillner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2012,4,27]]},"reference":[{"key":"2024051321003857000_88.6.451.1","first-page":"E061109.2","article-title":"A variant of Chlamydia trachomatis with deletion in cryptic plasmid: implications for use of PCR diagnostic tests","volume":"11","author":"Ripa","year":"2006","journal-title":"Euro Surveill"},{"key":"2024051321003857000_88.6.451.2","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1097\/OLQ.0b013e31805ce2b9","article-title":"A Chlamydia trachomatis strain with a 377-bp deletion in the cryptic plasmid causing false-negative nucleic acid amplification tests","volume":"34","author":"Ripa","year":"2007","journal-title":"Sex Transm Dis"},{"key":"2024051321003857000_88.6.451.3","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.39154.378079.BE"},{"key":"2024051321003857000_88.6.451.4","doi-asserted-by":"publisher","DOI":"10.1086\/497341"},{"key":"2024051321003857000_88.6.451.5","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.00451-07"},{"key":"2024051321003857000_88.6.451.6","doi-asserted-by":"crossref","unstructured":"Altman D . Practical Statistics for Medical Research. 1st edn. London: ChapmanHall, 1991:261.","DOI":"10.1201\/9780429258589"},{"key":"2024051321003857000_88.6.451.7","doi-asserted-by":"publisher","DOI":"10.3201\/eid1409.080153"},{"key":"2024051321003857000_88.6.451.8","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2164-10-239"},{"key":"2024051321003857000_88.6.451.9","doi-asserted-by":"publisher","DOI":"10.1099\/mic.0.036830-0"},{"key":"2024051321003857000_88.6.451.10","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-0691.2010.03305.x"},{"key":"2024051321003857000_88.6.451.11","doi-asserted-by":"publisher","DOI":"10.1093\/ije\/dyn222"},{"key":"2024051321003857000_88.6.451.12","doi-asserted-by":"publisher","DOI":"10.1136\/sti.2009.040196"},{"key":"2024051321003857000_88.6.451.13","unstructured":"Persson K . Epidemiology of serovars of Chlamydia Trachomatis. In: Bowie W Caldwell HD Jones R , eds. Chlamydial Infections. 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