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Full-genome sequences of porcine circovirus 3 (PCV3) and high prevalence in mummified fetuses from commercial farms in Brazil.

Abstract：

:The clinical implications of recently discovered porcine circovirus 3 (PCV3) infections are still unknown. The potential role of this emerging virus in reproductive loss in swine has been described. Herein, we report a high prevalence of PCV3 in mummified fetuses from sows maintained in modern farms in Rio Grande do Sul, Santa Catarina, Paraná, Goiás, and Mato Grosso do Sul states, Brazil. For this analysis, 276 mummified fetuses from 11 commercial swine farms were included. The presence of PCV3 DNA was confirmed using PCR, and the complete sequence of five different viral strains was obtained. Sequences of PCV3 genomes available on GenBank were then used for phylogenetic tree construction. Of the 276 mummified fetuses examined, 270 (nearly 97%) were positive for PCV3. In 93.1% of the fetuses, co-infections with at least one of the following agents were identified: porcine parvovirus (PPV), porcine circovirus 2 (PCV2) and Leptospira spp. Twelve fetuses were positive for PCV3 alone. The amino acid sequence of the capsid gene for the five viral strains shared 98-100% homology among them. Analysis of the DNA sequence indicates that the viruses identified in this study belong to the PCV3a1 subgroup. In summary, PCV3 DNA was detected in mummified fetuses at a surprisingly high rate. The role of PCV3 in porcine circovirus-associated disease (PCVAD) is still uncertain. However, considering that PCV3 has been detected in a variety of conditions, even in healthy animals, the present results confirm the need to investigate PCV3 as a causative agent of fetal mummification in swine.

journal_name

Microb Pathog

journal_title

Microbial pathogenesis

authors

Dal Santo AC,Cezario KC,Bennemann PE,Machado SA,Martins M

doi

10.1016/j.micpath.2020.104027

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

104027

eissn

0882-4010

issn

1096-1208

pii

S0882-4010(19)32056-X

journal_volume

141

pub_type

杂志文章

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