Congenital tremor and splay leg in Swedish piglets : a study of the viral causes and routes of transmission

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Fältnamn	Indikatorer	Metadata
000		03207nam a2200325 4500
001		oai:slubar.slu.se:122847
003		SwePub
008		240410s2023 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
020		a 9789180461801
020		a 9789180461818
024	7	a https://res.slu.se/id/publ/1228472 URI
024	7	a https://doi.org/10.54612/a.28i762gc2k2 DOI
040		a (SwePub)slu
041		a engb eng
042		9 SwePub
072	7	a vet2 swepub-contenttype
072	7	a dok2 swepub-publicationtype
100	1	a Stenberg, Hedvigu Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för biomedicin och veterinär folkhälsovetenskap (BVF),Department of Biomedical Science and Veterinary Public Health4 aut
245	1 0	a Congenital tremor and splay leg in Swedish piglets : a study of the viral causes and routes of transmission
264	1	c 2023
264	1	b Swedish University of Agricultural Sciences,c 2024
490	0	a Acta Universitatis Agriculturae Sueciae,x 1652-6880
520		a Congenital tremor (CT) and splay leg (SL) are diseases regularly seen in new-born piglets in Sweden. They are diagnosed based on the clinical picture, which in CT are tremor and sometimes ataxia, and in SL, a lack of adduction of the hind legs. The cause of the clinical signs is unknown, but impaired nerve function due to myelin damage is a theory. However, the syndromes are transient, and piglets that can nurse often recover within some months. For decades, there has been speculation about the causes of these diseases. Infection in utero with certain viruses, hereditary factors, and drug treatment of pregnant sows may induce the syndromes in the offspring. In Sweden, one type of CT has been described: CT type A-II, a variant that for a long time was suspected to be caused by an unknown virus. Then, in 2015, a new virus named atypical porcine pestivirus (APPV) was discovered, and in 2016, APPV was associated with CT type A-II. There were also indications of an association between APPV and SL. This thesis aimed to investigate viral causes of CT type A-II and SL in Swedish piglets. APPV was detected in brain tissue from piglets with signs of CT type A-II, both in new and historical material. The virus could also be detected in commercial boar semen from a Swedish boar stud and in serum samples from Swedish wild boars. However, the virus was not found in piglets with splay leg or in healthy piglets, and high-throughput sequencing of the material did not reveal any other relevant viruses. Consequently, it seems unlikely that APPV, or any other virus, would be the primary cause of SL in Sweden.
650	7	a LANTBRUKSVETENSKAPERx Veterinärmedicinx Klinisk vetenskap0 (SwePub)403032 hsv//swe
650	7	a AGRICULTURAL SCIENCESx Veterinary Sciencex Clinical Science0 (SwePub)403032 hsv//eng
710	2	a Sveriges lantbruksuniversitetb Institutionen för biomedicin och veterinär folkhälsovetenskap (BVF)4 org
710	2	a Sveriges lantbruksuniversitet
856	4	u https://pub.epsilon.slu.se/id/eprint/31778/contentsx primaryx Raw objectx freey FULLTEXT
856	4 8	u https://res.slu.se/id/publ/122847
856	4 8	u https://doi.org/10.54612/a.28i762gc2k

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