Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in Brazil
Porcine circovirus type 2 (PCV-2) is the agent of one of the most important diseases in the swine industry. Although it has been controlled through vaccination, viremic piglets at birth may represent a risk by reducing vaccination efficacy. Since there are few reports on the viremic status of pre-su...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-04-01
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| Series: | Frontiers in Veterinary Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fvets.2024.1368644/full |
| _version_ | 1827290163228704768 |
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| author | Ricardo T. Lippke Ricardo T. Lippke Elisa R. De Conti Luciana F. Hernig Angélica P. Teixeira Fernando A. de Quadros Aparecida T. Fiúza Juliana B. Pereira Rafael da Rosa Ulguim David E. S. N. Barcellos Karine Ludwig Takeuti |
| author_facet | Ricardo T. Lippke Ricardo T. Lippke Elisa R. De Conti Luciana F. Hernig Angélica P. Teixeira Fernando A. de Quadros Aparecida T. Fiúza Juliana B. Pereira Rafael da Rosa Ulguim David E. S. N. Barcellos Karine Ludwig Takeuti |
| author_sort | Ricardo T. Lippke |
| collection | DOAJ |
| description | Porcine circovirus type 2 (PCV-2) is the agent of one of the most important diseases in the swine industry. Although it has been controlled through vaccination, viremic piglets at birth may represent a risk by reducing vaccination efficacy. Since there are few reports on the viremic status of pre-suckling piglets regarding PCV-2 infection, we assessed the PCV-2 frequency in sows housed in 18 breeding farms with no history of clinical PCVAD in Brazil, using placental umbilical cord serum (PUCS). The selection criteria were: breeding farms with more than 1,000 sows; sows not vaccinated for PCV-2 at least for 2 years prior to the study; farms with no history of PCV-2 clinical disease in the last 12 months; and production systems with a maximum of two sites. Blood from the umbilical cords in sow placenta or directly from piglet’s immediately after birth was collected from 30 litters on each farm for PCR. In addition, blood from 538 sows was collected for PCV-2 antibody detection. A total of 17.29% of the PUCS tested positive. The PCV-2 DNA was detected in PUCS from 94.4% of all farms. A total of 94.8% of the sows was positive for PCV-2 antibodies. However, seronegative sows were detected in 44.4% of farms. All 18 farms had at least 46.9% seropositive dams. A higher percentage of seronegative sows was observed for farms with more than 10% of PCV-2-positive litters compared to those with ≤10% of PCV-2 positive litters (8.9 +/−1.7% vs. 1.5 +/− 0.7%, p < 0.01, respectively). |
| first_indexed | 2024-04-24T12:04:26Z |
| format | Article |
| id | doaj.art-ce44f4ee7e414215a7ee5ac6c1b61b62 |
| institution | Directory Open Access Journal |
| issn | 2297-1769 |
| language | English |
| last_indexed | 2024-04-24T12:04:26Z |
| publishDate | 2024-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Veterinary Science |
| spelling | doaj.art-ce44f4ee7e414215a7ee5ac6c1b61b622024-04-08T12:35:59ZengFrontiers Media S.A.Frontiers in Veterinary Science2297-17692024-04-011110.3389/fvets.2024.13686441368644Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in BrazilRicardo T. Lippke0Ricardo T. Lippke1Elisa R. De Conti2Luciana F. Hernig3Angélica P. Teixeira4Fernando A. de Quadros5Aparecida T. Fiúza6Juliana B. Pereira7Rafael da Rosa Ulguim8David E. S. N. Barcellos9Karine Ludwig Takeuti10Boehringer-Ingelheim Animal Health do Brasil, São Paulo, BrazilSetor de Suínos, Universidade Federal do Rio Grande do Sul, Porto Alegre, BrazilBoehringer-Ingelheim Animal Health do Brasil, São Paulo, BrazilBoehringer-Ingelheim Animal Health do Brasil, São Paulo, BrazilBoehringer-Ingelheim Animal Health do Brasil, São Paulo, BrazilBoehringer-Ingelheim Animal Health do Brasil, São Paulo, BrazilBoehringer-Ingelheim Animal Health do Brasil, São Paulo, BrazilBoehringer-Ingelheim Animal Health do Brasil, São Paulo, BrazilSetor de Suínos, Universidade Federal do Rio Grande do Sul, Porto Alegre, BrazilSetor de Suínos, Universidade Federal do Rio Grande do Sul, Porto Alegre, BrazilUniversidade Feevale, Novo Hamburgo, BrazilPorcine circovirus type 2 (PCV-2) is the agent of one of the most important diseases in the swine industry. Although it has been controlled through vaccination, viremic piglets at birth may represent a risk by reducing vaccination efficacy. Since there are few reports on the viremic status of pre-suckling piglets regarding PCV-2 infection, we assessed the PCV-2 frequency in sows housed in 18 breeding farms with no history of clinical PCVAD in Brazil, using placental umbilical cord serum (PUCS). The selection criteria were: breeding farms with more than 1,000 sows; sows not vaccinated for PCV-2 at least for 2 years prior to the study; farms with no history of PCV-2 clinical disease in the last 12 months; and production systems with a maximum of two sites. Blood from the umbilical cords in sow placenta or directly from piglet’s immediately after birth was collected from 30 litters on each farm for PCR. In addition, blood from 538 sows was collected for PCV-2 antibody detection. A total of 17.29% of the PUCS tested positive. The PCV-2 DNA was detected in PUCS from 94.4% of all farms. A total of 94.8% of the sows was positive for PCV-2 antibodies. However, seronegative sows were detected in 44.4% of farms. All 18 farms had at least 46.9% seropositive dams. A higher percentage of seronegative sows was observed for farms with more than 10% of PCV-2-positive litters compared to those with ≤10% of PCV-2 positive litters (8.9 +/−1.7% vs. 1.5 +/− 0.7%, p < 0.01, respectively).https://www.frontiersin.org/articles/10.3389/fvets.2024.1368644/fullPCV-2PCRpiglet viremiaserologyswine |
| spellingShingle | Ricardo T. Lippke Ricardo T. Lippke Elisa R. De Conti Luciana F. Hernig Angélica P. Teixeira Fernando A. de Quadros Aparecida T. Fiúza Juliana B. Pereira Rafael da Rosa Ulguim David E. S. N. Barcellos Karine Ludwig Takeuti Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in Brazil Frontiers in Veterinary Science PCV-2 PCR piglet viremia serology swine |
| title | Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in Brazil |
| title_full | Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in Brazil |
| title_fullStr | Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in Brazil |
| title_full_unstemmed | Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in Brazil |
| title_short | Assessment of sow herd frequency of PCV-2 using placental umbilical cord serum and serology in 18 breeding farms in Brazil |
| title_sort | assessment of sow herd frequency of pcv 2 using placental umbilical cord serum and serology in 18 breeding farms in brazil |
| topic | PCV-2 PCR piglet viremia serology swine |
| url | https://www.frontiersin.org/articles/10.3389/fvets.2024.1368644/full |
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