A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?

Since porcine kobuvirus (PKV) was first described in 2008, researchers have speculated whether the virus is of clinical importance. This systematic literature review answers the question: Is porcine kobuvirus a cause of gastrointestinal disease in young pigs? A case-control study showed that PKV was...

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Main Author: Esben Østergaard Eriksen
Format: Article
Language:English
Published: MDPI AG 2023-04-01
Series:Veterinary Sciences
Subjects:
Online Access:https://www.mdpi.com/2306-7381/10/4/286
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author Esben Østergaard Eriksen
author_facet Esben Østergaard Eriksen
author_sort Esben Østergaard Eriksen
collection DOAJ
description Since porcine kobuvirus (PKV) was first described in 2008, researchers have speculated whether the virus is of clinical importance. This systematic literature review answers the question: Is porcine kobuvirus a cause of gastrointestinal disease in young pigs? A case-control study showed that PKV was not associated with neonatal diarrhea. A cohort study suffered from a very small sample size (<i>n</i> = 5), and in an experimental trial, the effect of PKV inoculation could not be separated from the effect of being inoculated with porcine epidemic diarrhea virus. In 13 poorly defined observational studies, more than 4000 young pigs had been assigned a diarrhea status and their feces analyzed for PKV. Unfortunately, the studies lacked well-characterized unbiased samples, and thus the strongest possible inference from these studies was that a very strong association between PKV and diarrhea is unlikely. PKV was commonly detected in non-diarrheic pigs, and this could indicate that PKV is not a sufficient cause in itself or that reinfection of individuals with some immunological protection due to previous infections is common. Conclusively, there is a lack of good evidence of PKV being a cause of gastrointestinal disease, but the sparse available evidence suggests that PKV is of limited clinical importance.
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spelling doaj.art-38e2ef1d3aa24a83a605f191429c36e62023-11-17T21:43:48ZengMDPI AGVeterinary Sciences2306-73812023-04-0110428610.3390/vetsci10040286A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?Esben Østergaard Eriksen0Section for Production, Nutrition and Health, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, DenmarkSince porcine kobuvirus (PKV) was first described in 2008, researchers have speculated whether the virus is of clinical importance. This systematic literature review answers the question: Is porcine kobuvirus a cause of gastrointestinal disease in young pigs? A case-control study showed that PKV was not associated with neonatal diarrhea. A cohort study suffered from a very small sample size (<i>n</i> = 5), and in an experimental trial, the effect of PKV inoculation could not be separated from the effect of being inoculated with porcine epidemic diarrhea virus. In 13 poorly defined observational studies, more than 4000 young pigs had been assigned a diarrhea status and their feces analyzed for PKV. Unfortunately, the studies lacked well-characterized unbiased samples, and thus the strongest possible inference from these studies was that a very strong association between PKV and diarrhea is unlikely. PKV was commonly detected in non-diarrheic pigs, and this could indicate that PKV is not a sufficient cause in itself or that reinfection of individuals with some immunological protection due to previous infections is common. Conclusively, there is a lack of good evidence of PKV being a cause of gastrointestinal disease, but the sparse available evidence suggests that PKV is of limited clinical importance.https://www.mdpi.com/2306-7381/10/4/286kobuvirusaichiviruspicornaviridaepiggastrointestinal diseasediarrhea
spellingShingle Esben Østergaard Eriksen
A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?
Veterinary Sciences
kobuvirus
aichivirus
picornaviridae
pig
gastrointestinal disease
diarrhea
title A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?
title_full A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?
title_fullStr A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?
title_full_unstemmed A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?
title_short A Systematic Review: Is Porcine Kobuvirus Causing Gastrointestinal Disease in Young Pigs?
title_sort systematic review is porcine kobuvirus causing gastrointestinal disease in young pigs
topic kobuvirus
aichivirus
picornaviridae
pig
gastrointestinal disease
diarrhea
url https://www.mdpi.com/2306-7381/10/4/286
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