{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T01:12:55Z","timestamp":1790730775476,"version":"4.1.0"},"reference-count":40,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[2016,5,19]],"date-time":"2016-05-19T00:00:00Z","timestamp":1463616000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":["www.tandfonline.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2016,6,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Francisella infections developed in freshwater Nile Tilapia Oreochromis niloticus and red tilapia Oreochromis spp. farms in Thailand during 2012\u20132014. The diseased fish were lethargic and pale in color and showed numerous white nodules in their enlarged spleens. Histopathological examination and electron microscopy suggested that the white nodules were multifocal granulomas consisting of coccobacilli within vacuolated cells. Isolation of Francisella-like bacteria was achieved from 42 of 100 samples, while polymerase chain reaction confirmed Francisella infections in all samples. Analysis of the 16S rRNA gene from samples obtained from three different geographical culture areas revealed more than 99% similarity with F. noatunensis subsp. orientalis. The influence of Francisella infection on inflammatory cytokines was determined on splenic cells of fish intraperitoneally injected with the bacteria (0.8 \u00d7 105 colony-forming units per fish). Infected tilapia showed significantly greater expression of the pro-inflammatory genes interleukin-1\u03b2 (IL-1\u03b2) and tumor necrotic factor-\u03b1 (TNF-\u03b1) within 24 h postinjection (hpi) and for up to 96 hpi. However, down-regulation of an anti-inflammatory gene, transforming growth factor-\u03b2 (TGF-\u03b2) was observed as early as 24 hpi. This investigation demonstrates that an imbalance between pro- and anti-inflammatory cytokines in response to the infection may account for the substantial number of granulomas in fish hematopoietic tissues that was found in the later stage of the disease.<\/jats:p>\n                  <jats:p>Received September 9, 2015; accepted December 13, 2015<\/jats:p>","DOI":"10.1080\/08997659.2015.1135198","type":"journal-article","created":{"date-parts":[[2016,5,20]],"date-time":"2016-05-20T03:27:54Z","timestamp":1463714874000},"page":"97-106","update-policy":"https:\/\/doi.org\/10.1080\/tandf_crossmark_01","source":"Crossref","is-referenced-by-count":32,"title":["<i>Francisella<\/i>\n                    Infection in Cultured Tilapia in Thailand and the Inflammatory Cytokine Response"],"prefix":"10.1093","volume":"28","author":[{"given":"Sasibha","family":"Jantrakajorn","sequence":"first","affiliation":[{"name":"Faculty of Veterinary Science Prince of Songkla University Songkhla 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