Senecavirus A seroprevalence and risk factors in United States pig farms

被引:11
|
作者
Preis, Guilherme [1 ]
Sanhueza, Juan M. [1 ,2 ]
Vilalta, Carles [1 ,3 ,4 ]
Vannucci, Fabio A. [1 ,5 ]
Culhane, Marie R. [1 ]
Corzo, Cesar A. [1 ]
机构
[1] Univ Minnesota, Coll Vet Med, Vet Populat Med Dept, St Paul, MN 55455 USA
[2] Univ Catolica Temuco, Fac Recursos Nat, Dept Ciencias Vet & Salud Publ, Temuco, Chile
[3] Campus Univ Autonoma Barcelona, Unitat Mixta Invest IRTA UAB Sanitat Anim, Ctr Recercaen Sanitat Anim, Bellaterra, Catalonia, Spain
[4] Campus Univ Autonoma Barcelona, IRTA, Programa Sanitat Anim, Ctr Recerca Sanitat Anim, Bellaterra, Catalonia, Spain
[5] Univ Minnesota, Univ Minnesota Vet Diag Lab, Coll Vet Med, St Paul, MN USA
关键词
senecavirus A; seroprevalence; risk factors; vesicular disease; swine; IDIOPATHIC VESICULAR DISEASE; COMPLETE GENOME; VALLEY-VIRUS; INFECTION; SWINE;
D O I
10.3389/fvets.2022.1011975
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Senecavirus A (SVA) is a non-enveloped, single-stranded, positive-sense RNA virus belonging to the Picornaviridae family. Senecavirus A is constantly associated with outbreaks of vesicular disease in pigs and has been reported in several countries since its first large-scale outbreak in 2014. Senecavirus A's clinical disease and lesions are indistinguishable from other vesicular foreign animal diseases (FAD). Therefore, an FAD investigation needs to be conducted for every SVA case. For this reason, SVA has been attributed as the cause of an alarming increase in the number of yearly FAD investigations performed by the United States Department of Agriculture (USDA). The objectives of this study were to estimate the seroprevalence of SVA antibodies in breeding and growing pig farms in the United States and to determine the farm-level risk factors associated with seropositivity. A total of 5,794 blood samples were collected from 98 and 95 breeding and growing pig farms in 17 states. A farm characteristics questionnaire was sent to all farms, to which 80% responded. The responses were used to conduct logistic regression analyses to assess the risk factors associated with SVA seropositivity. The estimated farm-level seroprevalences were 17.3% and 7.4% in breeding and growing pig farms, respectively. Breeding farms had 2.64 times higher odds of SVA seropositivity than growing pig farms. One key risk factor identified in breeding farms was the practice of rendering dead animal carcasses. However, the adoption of a higher number of farm biosecurity measures was associated with a protective effect against SVA seropositivity in breeding farms.
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页数:9
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