{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T17:29:31Z","timestamp":1790789371434,"version":"4.1.0"},"reference-count":20,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,9,8]],"date-time":"2022-09-08T00:00:00Z","timestamp":1662595200000},"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":"\n Several episodes of increased mortality in wild birds of the families\n Paridae<\/jats:italic>\n and\n Aegithalidae<\/jats:italic>\n have been documented in recent decades. The majority of affected animals exhibited necrotizing pneumonia with intralesional bacteria.\n Suttonella<\/jats:italic>\n (\n S<\/jats:italic>\n .)\n ornithocola<\/jats:italic>\n , a gram-negative bacterium in the\n Cardiobacteriaceae<\/jats:italic>\n family, has been regularly cultured bacteriologically from affected birds and has long been suspected as a potentially fatal cause of respiratory disease in birds. However, a direct causal relationship between this specific bacterium and the observed lesions within birds has not yet been established. Therefore, postmortem tissue from six tits was used in the present study, including three blue tits (\n Cyanistes caeruleus<\/jats:italic>\n ) and three great tits (\n Parus major<\/jats:italic>\n ). Five of the six tits tested positive for\n S. ornithocola<\/jats:italic>\n in bacteriological examination and originated from two incidents of increased mortality in\n Paridae<\/jats:italic>\n in Germany. Animals found dead in the administrative district of Arnsberg (North Rhine Westphalia) in 2018 and 2020 were investigated for genomic fragments of\n S. ornithocola<\/jats:italic>\n by chromogenic\n in situ<\/jats:italic>\n hybridization using a newly developed DNA probe based on publicly assessable DNA sequences of the 16S rRNA gene of\n S. ornithocola<\/jats:italic>\n . Positive hybridization signals were detected in five out of five animals and were predominantly detected within necrotizing lesions in lung and occasionally in lesions affecting liver and trachea. Interestingly, the lung of one animal without obvious necrotizing pulmonary lesions revealed positive hybridization results in the lumen of one pulmonary blood vessel. Two negative controls, including one bacteriologically\n S. ornithocola<\/jats:italic>\n -negative great tit and a cattle egret (\n Bubulcus ibis<\/jats:italic>\n ) suffering from salmonellosis, did not yield positive signals, indicating high sensitivity and specificity of the probe used. This is the first time that\n S. ornithocola<\/jats:italic>\n has been clearly identified within necrotizing lesions in deceased tits. Although Koch's postulates have yet to be fulfilled, positive hybridization signals in association with detectable lesions are considered as further and strong evidence of the significant contribution of\n S. ornithocola<\/jats:italic>\n to the several episodes of tit mortality recorded in Germany.\n <\/jats:p>","DOI":"10.3389\/fvets.2022.977570","type":"journal-article","created":{"date-parts":[[2022,9,8]],"date-time":"2022-09-08T03:42:43Z","timestamp":1662608563000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Suttonella ornithocola detected within lesions of tit birds (Paridae) from epidemic death episodes in Germany, 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