Background: Swine dysentery, caused by Brachyspira hyodysenteriae, is a severe pig disease. Resistance to tylosins is common and resistance to tiamulin has been reported since the 1990s. Still, dysentery is not notifiable to authorities. The disease therefore escapes control from an overall population perspective. In Sweden, a program that aimed to control dysentery at national level was initiated in 2020, mainly due to the unexpected diagnosis of tiamulin resistant Brachyspira hyodysenteriae in 2016.
Results: Through joint efforts of a network including farmers, government, animal health organisations and abattoirs it was concluded that outbreaks of dysentery had taken place in 25 herds between 2016 and 2019. By 1 January 2020, nine of these herds were still not declared free from the disease. From that date, the network decided that Brachyspira hyodysenteriae was to be cultured whenever dysentery could be suspected. Thus, 148, 157 and 124 herds were scrutinised for Brachyspira hyodysenteriae in 2020, 2021 and 2022, respectively, whereof five, three and two new herds were confirmed positive. By 31 December 2022, four herds were judged as impossible to sanitise. However, they posed no problem since they were identified by the network, pigs to and from these enterprises could be transported without jeopardising other herds. When Brachyspira hyodysenteriae was diagnosed in fattening herds purchasing growers, Brachyspira hyodysenteriae could not be detected in the delivering herds. That result, together with other observations, indicated that Brachyspira hyodysenteriae ought to be regarded as ubiquitous, although at a low level in healthy pigs.
Conclusions: Eradication of dysentery contributed to substantial welfare and financial improvements in affected herds. Dysentery was controlled successfully at national level through the united efforts from competing stake holders, such as different abattoirs and animal health organisations. However, as Brachyspira hyodysenteriae was assumed to be ubiquitous, although at a low level in healthy pigs, the duration of the successful control of dysentery was concluded to only be transient. Without permanent monitoring for Brachyspira hyodysenteriae, the knowledge of the national status will rapidly decline to the level prior to the initiation of the control program.
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http://dx.doi.org/10.1186/s13028-024-00769-3 | DOI Listing |
Front Cell Infect Microbiol
December 2024
State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China.
Introduction: , , , and are the primary pathogens responsible for gastrointestinal diseases in pigs, posing a significant threat to the health and productivity of pig production systems. Pathogen detection is a crucial tool for monitoring and managing these infections.
Methods: We designed primers and probes targeting the gene of , the 23S gene of , the gene of , and the gene of .
Acta Vet Scand
September 2024
Swedish Veterinary Agency, SVA, 751 89, Uppsala, Sweden.
Background: Swine dysentery, caused by Brachyspira hyodysenteriae, is a severe pig disease. Resistance to tylosins is common and resistance to tiamulin has been reported since the 1990s. Still, dysentery is not notifiable to authorities.
View Article and Find Full Text PDFFront Vet Sci
August 2024
Shandong Engineering Research Center of Swine Health Data and Intelligent Monitoring, Dezhou University, Dezhou, China.
Introduction: PEDV, and , are highly contagious diarrheal pathogens that have caused significant harm to the global swine industry. Co-infections with multiple pathogens are common, making it challenging to identify the actual causative agents depending only on clinical information. It is crucial to develop a reliable method to simultaneously detect and differentiate these pathogens.
View Article and Find Full Text PDFAm J Physiol Gastrointest Liver Physiol
November 2024
Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
In this study, we uncovered the novel mechanism of IL-1α-mediated downregulated in adenoma (DRA) () downregulation in the context of spp.induced malabsorptive diarrhea. Experimentally infected pigs with spp.
View Article and Find Full Text PDFPorcine Health Manag
June 2024
Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, León, Spain.
Background: Swine dysentery (SD) is a severe mucohaemorrhagic colitis in pigs caused classically by Brachyspira hyodysenteriae. Although several aspects of B. hyodysenteriae infection dynamic are already described, further research in the early stage of this infection is required.
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