Porcine Reproductive and Respiratory Syndrome (PRRSV2) Viral Diversity within a Farrow-to-Wean Farm Cohort Study
View/Open
Author
Kikuti, Mariana
Sanhueza, Juan
Pamornchainavakul, Nakarin
Kevill, Jessica
Yang, My
Paploski, Igor A. D.
Lenskaia, Tatiana
Odogwu, Nkechi M.
Kiehne, Ross
VanderWaal, Kimberly
Schroeder, Declan
Corzo, Cesar A.
Publication date
2023-08-30ISSN
1999-4915
Abstract
Describing PRRSV whole-genome viral diversity data over time within the host and withinfarm is crucial for a better understanding of viral evolution and its implications. A cohort study was
conducted at one naïve farrow-to-wean farm reporting a PRRSV outbreak. All piglets 3–5 days of age
(DOA) born to mass-exposed sows through live virus inoculation with the recently introduced wildtype virus two weeks prior were sampled and followed up at 17–19 DOA. Samples from 127 piglets
were individually tested for PRRSV by RT-PCR and 100 sequences were generated using Oxford
Nanopore Technologies chemistry. Female piglets had significantly higher median Ct values than
males (15.5 vs. 13.7, Kruskal–Wallis p < 0.001) at 3–5 DOA. A 52.8% mortality between sampling
points was found, and the odds of dying by 17–19 DOA decreased with every one unit increase
in Ct values at 3–5 DOA (OR = 0.76, 95% CI 0.61–0.94, p = 0.01). Although the within-pig percent
nucleotide identity was overall high (99.7%) between 3–5 DOA and 17–19 DOA samples, ORFs 4
and 5a showed much lower identities (97.26% and 98.53%, respectively). When looking solely at
ORF5, 62% of the sequences were identical to the 3–5 DOA consensus. Ten and eight regions showed
increased nucleotide and amino acid genetic diversity, respectively, all found throughout ORFs 2a/2b,
4, 5a/5, 6, and 7.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
619 - Veterinary science
Pages
11
Publisher
MDPI
Is part of
Viruses
Citation
Kikuti, Mariana, Carles Vilalta, Juan Sanhueza, Nakarin Pamornchainavakul, Jessica L. Kevill, Ming‐Chien Yang, Igor Adolfo Dexheimer Paploski, et al. 2023 “Porcine Reproductive and Respiratory Syndrome (PRRSV2) Viral Diversity within a Farrow-to-Wean Farm Cohort Study.” Viruses 15 (9): 1837. doi:10.3390/v15091837.
Program
Sanitat Animal
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2635]
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/