{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T19:58:55Z","timestamp":1789070335812,"version":"build-2803163510"},"reference-count":77,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,9,29]],"date-time":"2022-09-29T00:00:00Z","timestamp":1664409600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Vet. Sci."],"abstract":"<jats:p>The past and current burden of swine influenza A viruses (swIAV) must be estimated since pigs act as mixing vessels and are considered a potential source of newly emerging IAV variants. The objective of this systematic review and meta-analysis was to integrate data on the prevalence and seroprevalence of swIAV in South Korean domestic pigs and evaluate important risk factors that influence these outcomes. Eight databases were searched for studies that evaluated the prevalence and seroprevalence of swIAV in South Korean pigs using a specified search string; twenty-seven eligible studies were identified after application of a set of pre-determined inclusion criteria by three authors. The reported prevalence and seroprevalence were pooled separately in proportions between 0 and 1, using a random-effect meta-analysis. To identify and quantify potential sources of heterogeneity, subgroup, and meta-regression analyses were conducted using covariates (publication type, swIAV subtype, growth stage of pigs, sampling region, publication year, sampling season, facility, detection method, sample type, and sample size). The overall prevalence and seroprevalence in domestic pigs were 0.05 [95% confidence intervals (CIs): 0.05\u20130.12] and 0.35 (95% CIs: 0.14\u20130.63), respectively. To identify the impact of covariates on effect size, a suitable meta-regression model was determined using predictor importance estimates with corrected Akaike information criterion values. Consequently, the best-fit model included two covariates, publication year and sample size, which were significantly associated with high heterogeneity in the subgroup analysis. Furthermore, data visualization depicted a significant non-linear association between swIAV prevalence and seroprevalence and specific growth stages of pigs. These findings suggest that the periodic monitoring of pigs at different growth stages in large farms may help to establish the status of swIAV-spread across species in the region, and thereby minimize pandemic risk.<\/jats:p>","DOI":"10.3389\/fvets.2022.1003351","type":"journal-article","created":{"date-parts":[[2022,9,29]],"date-time":"2022-09-29T09:37:28Z","timestamp":1664444248000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Risk factors influencing swine influenza A virus infection in South Korea: A systematic review and meta-analysis of prevalence and seroprevalence"],"prefix":"10.3389","volume":"9","author":[{"given":"Simin","family":"Lee","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eurade","family":"Ntakiyisumba","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jae-Won","family":"Seol","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gayeon","family":"Won","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2022,9,29]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"576","DOI":"10.1002\/9781119350927.ch36","article-title":"Influenza viruses","author":"Van Reeth","year":"2019","journal-title":"Dis Swine."},{"key":"B2","doi-asserted-by":"publisher","first-page":"983","DOI":"10.1016\/j.cell.2009.05.032","article-title":"Unraveling the mystery of swine influenza virus","volume":"137","author":"Wang","year":"2009","journal-title":"Cell."},{"key":"B3","doi-asserted-by":"publisher","first-page":"434","DOI":"10.1186\/1743-422X-8-434","article-title":"Distribution of sialic acid receptors and influenza A virus of avian and swine origin in experimentally infected pigs","volume":"8","author":"Trebbien","year":"2011","journal-title":"Virol J."},{"key":"B4","doi-asserted-by":"publisher","first-page":"1470","DOI":"10.3201\/eid1409.080305","article-title":"Human case of swine influenza A (H1N1) triple reassortant virus infection, Wisconsin","volume":"14","author":"Newman","year":"2008","journal-title":"Emerg Infect Dis."},{"key":"B5","first-page":"21","article-title":"\u201cHistory of swine influenza,\u201d","author":"Schultz-Cherry","year":"2013","journal-title":"Swine Influenza. 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