Vaccination of Sows against Porcine Circovirus Type 2 (PCV2) in a Subclinically Infected Herd Does Not Impact Reproductive Performance

Piotr Cybulski,Tomasz Stadejek,Aleksandra Woźniak,Katarzyna Podgórska

doi:10.3390/agriculture10120639

Piotr Cybulski, Tomasz Stadejek + Show 2 more

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https://doi.org/10.3390/agriculture10120639

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Abstract

Porcine circovirus type 2 (PCV2) vaccination in piglets has become one of the crucial and indisputable procedures in modern swine production. The role of PCV2 vaccination in breeding animals is less explored. In the present study, the evaluation of the impact of sow vaccination on reproductive parameters was performed in a high health status, PCV2 subclinically infected herd of 3200 sows. The comparison of the number of liveborn, stillborn, and weak born piglets between groups of sows vaccinated on 1 or 28 days after weaning, or nonvaccinated, did not show any statistically significant differences. Although in the tested farm the vaccination of sows appeared to have no effect on reproductive performance, the results should not be generalized. Careful and individualized analysis of diagnostic and production data is crucial in economizing infectious disease control programs in sow herds and pig populations.

Highlights

Porcine circovirus type 2 (PCV2) is a small, nonenveloped member of the family Circoviridae.The virus is ubiquitous in domestic swine and is involved in an aetiology of a wide range of disease syndromes causing significant economic losses in the swine industry [1]
The results showed low PCV2 viral loads with cycle threshold (Ct) of 32.0 and
Vaccination of gilts is often practised prior to the first insemination to limit the risk of PCV2-RD

Summary

Introduction

Porcine circovirus type 2 (PCV2) is a small, nonenveloped member of the family Circoviridae.The virus is ubiquitous in domestic swine and is involved in an aetiology of a wide range of disease syndromes causing significant economic losses in the swine industry [1]. Porcine circovirus type 2 (PCV2) is a small, nonenveloped member of the family Circoviridae. PCV2 causes subclinical infections in pigs (PCV2-SI). In the presence of certain infectious or noninfectious triggers, the course of infection may drift towards a range of clinical forms, collectively referred to as porcine circovirus diseases (PCVD) [2]. The evidence from experimental data showed that porcine embryos are susceptible to infection, which might lead to embryonic death, stillbirth, or foetus mummification [4]. There are several well-documented cases of experimentally induced PCV2-RD following transuterine inoculations of foetuses [5], oronasal inoculation of pregnant sows [6], intrauterine inoculation of PCV2-negative sows [7], and embryo exposure [8]

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