Risk factors for the infection with Brachyspira hyodysenteriae in pig herds

Zeeh, Friederike; Vidondo, Beatriz

doi:10.1016/j.prevetmed.2019.104819

Cited by 8 publications

(2 citation statements)

References 35 publications

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“…The number of origins per batch of pigs has not yet been described in context of HBS. Rather the influence of multiple origins per batch in relation to infectious agents as well as the transmission of such was investigated [ 20 ]. In the present study the chance to be a HBS case farm is 52 times more likely if two or more origins of pigs were given per batch as compared to having one origin only.…”

Section: Discussionmentioning

confidence: 99%

Housing and management factors and breed predisposition for haemorrhagic bowel syndrome in swine

Holenweger,

Schüpbach,

Hofer

et al. 2023

Porc Health Manag

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Background Haemorrhagic bowel syndrome (HBS) is a sporadically occurring disorder characterized by sudden death in pigs in combination with a pale and bloated carcass with no prior signs of disease. Most often HBS is affecting fattening pigs. Due to the good general health and performance before death as well as the time point of disease shortly prior to slaughter, this syndrome means a significant economic impact for the farm and is a major animal welfare concern. Furthermore, the cause or the causing agents have not yet been identified even though it is a worldwide known problem. The aim of this study was to detect possible risk factors for the occurrence of HBS with the focus on risk factors on herd level. Results Management and feeding strategies of 97 Swiss fattening herds with high and low HBS incidence were assessed and examined to identify risk factors for the disease. Having only pigs sired by the PREMO® breed in the herd showed to be a significant risk factor for HBS (Odds Ratio (OR) = 147) as compared to having other breeds or a mixture of multiple breeds. Furthermore, pigs from two or more origins per batch compared to having only one origin per batch significantly increased the disease risk (OR = 52). Farms with 1 decimetre greater feeding place width per finisher pig have a lower HBS incidence (OR = 0.07). The frequency of cleaning of the distribution pipes (split up into categories, e.g. once a month) was associated with being a HBS case farm (p < 0.05). Conclusion The four factors identified in this study for the occurrence of HBS represent different aspects of the environment and management. This leads to the assumption that it is a multifactorial syndrome and a thorough examination of each herd individually is necessary to mitigate disease risk. This study suggests that part of the susceptibility to HBS is genetically determined. The reduction of HBS in the herd should be the main objective to improve the economic status of the herd and improve animal welfare.

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Section: Discussionmentioning

confidence: 99%

Housing and management factors and breed predisposition for haemorrhagic bowel syndrome in swine

Holenweger,

Schüpbach,

Hofer

et al. 2023

Porc Health Manag

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“…Two herds had access to outdoor areas. As contact to foxes was one of the risk factors for SD in a recent study, 15 we asked specifically for this aspect. All three farmers reported foxes near their herds and also contacts of their pigs to the foxes.…”

Section: Short Communicationmentioning

confidence: 99%

Low occurrence of Brachyspira hyodysenteriae in Swiss pig herds with diarrhoea

Zeeh

Arnold

Schmitt

et al. 2021

SAT

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English Low occurrence of Brachyspira hyodysenteriae in Swiss pig herds with diarrhoea In the Swiss pig population, only four sequence types (ST6, ST66, ST196, ST197) of Brachyspira ( B .) hyodysenteriae , an agent of Swine Dysentery (SD), have been so far detected suggesting a limited number of sources of B. hyodysenteriae in the Swiss pig production. A one year culture-and molecular-based diagnostic project was performed to identify and trace back B. hyodysenteriae in pig herds with SD, and to identify possible new STs. Up to five faecal swabs from herds with diarrhoea were examined. Three out of 141 herds tested positive for B. hyodysenteriae of ST196 (n=2) and ST66 (n=1). A common source was unlikely as none of the supplier herds or pig trader was shared and the occurrence was very low (2.1%) in the study population. This low occurrence may have resulted from the monitoring and eradications during the last ten years, emphasising their further applications to control B. hyodysenteriae. Keywords: Swine dysentery, multi-locus sequence typing, MLST, molecular epidemiology, monitoring, eradication Deutsch Geringes Vorkommen von Brachyspira hyodysenteriae in Schweizer Schweinebeständen mit Durchfall Bisher wurden nur vier Sequenztypen (ST6, ST66, ST196, ST197) von Brachyspira (B.) hyodysenteriae, ein Erreger der Schweinedysenterie (SD), in der Schweizer Schweinepopulation nachgewiesen. Dies ist ein Hinweis auf eine begrenzte Anzahl von Quellen für B. hyodysenteriae in der Schweizer Schweineproduktion. Ein einjähriges kulturund molekularbasiertes Diagnoseprojekt wurde durchgeführt, um B. hyodysenteriae in Schweineherden mit SD zu identifizieren und zurückzuverfolgen, dies um mögliche neue STs zu erkennen. In Herden mit Durchfall wurden bis zu fünf Kotabstriche untersucht. In drei von 141 Herden wurde B. hyodysenteriae, ST196 (n=2) und ST66 (n=1), diagnostiziert. Eine gemeinsame Quelle war unwahrscheinlich, da keine der Herkunftsbestände oder Schweinehändler identisch waren und das Vorkommen in der Studienpopulation sehr gering war (2,1%). Dieses geringe Vorkommen ist auf das Überwachungs-und Ausrottungsprogramm während der letzten zehn Jahre zurückzuführen, und unterstützt die weitere koordinierte Bekämpfung von B. hyodysenteriae. Schlüsselwörter: Schweinedysenterie, Multi-Locus-Sequenztypisierung, MLST, Molekulare Epidemiologie, Überwachung, Ausrottung Français Faible occurrence de Brachyspira hyodysenteriae dans les effectifs de porcs suisses souffrant de diarrhée Dans la population porcine suisse, seuls quatre types de séquences (ST6, ST66, ST196, ST197) de Brachyspira (B.) hyodysenteriae, un agent de la dysenterie porcine (SD), ont été détectés jusqu'à présent, suggérant un nombre limité de sources de B. hyodysenteriae dans la production porcine suisse. Un projet de diagnostic basé sur la culture et l'analyse moléculaire a été réalisé sur une année pour identifier et suivre B. hyodysenteriae dans les effectifs de porcs avec SD et pour identifier de nouvelles ST possibles. Jusqu'à cinq écouvillons de matières féc...

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