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Identification and genome characterization of genotype B and genotype C bovine parainfluenza type 3 viruses isolated in the United States
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Identification and genome characterization of genotype B and genotype C bovine parainfluenza type 3 viruses isolated in the United States
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Identification and genome characterization of genotype B and genotype C bovine parainfluenza type 3 viruses isolated in the United States
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Journal Article
Identification and genome characterization of genotype B and genotype C bovine parainfluenza type 3 viruses isolated in the United States
2015
Overview
Background
Bovine parainfluenza 3 viruses (BPI3V) are respiratory pathogens of cattle that cause disease singly but are often associated with bovine respiratory disease complex (BRDC) in conjunction with other viral and bacterial agents. Bovine vaccines currently contain BPI3V to provide protection against the virus, but there is no current information regarding the BPI3V strains that are circulating in the U.S.
Results
A project was initiated to sequence archival BPI3V isolates to study viral evolution over time. This was done with a deep sequencing protocol that generated sequences of multiple RNA virus genomes simultaneously. Analysis of the BPI3V sequences revealed that, in addition to the genotype A (BPI3Va) viruses previously described in the United States, there were two additional genotypes of BPI3V circulating that had been described only in Australia (BPI3Vb) and Asia (BPI3Vc). The U.S. BPI3Vb and BPI3Vc isolates showed some divergence from the Australian and Asian strains; the BPI3Vb were 93 % similar to the Australian Q5592 strain and the BPI3Vc viruses were 98 % similar to the 12Q061 strain that was described in South Korea. Overall, the three genotypes were 82 to 84 % identical to each other and 80 % identical to the most similar human PI3V. Cross-neutralization studies using an APHIS/NVSL BPI3V reference serum showed that neutralization titers against the genotype B and C viruses were 4- to ≥16-fold less then the titer against the APHIS BPI3Va reference strain, SF-4.
Conclusions
This study clearly demonstrated that BPI3Vb and BPI3Vc strains, previously thought to be foreign to the U.S., are indeed circulating in domestic livestock herds. Based on virus neutralization using polyclonal antisera, there were antigenic differences between viruses from these genotypes and the BPI3Va viruses that are included in currently marketed bovine vaccines. Further study of these viruses is warranted to determine pathogenic potential and cross-protection afforded by vaccination.
Publisher
BioMed Central,BioMed Central Ltd
Subject
/ Animals
/ Cattle
/ Gene Expression Regulation, Viral - physiology
/ genome
/ Genomics
/ Genotype
/ herds
/ high-throughput nucleotide sequencing
/ humans
/ Medicine
/ Parainfluenza Virus 3, Bovine - genetics
/ Parainfluenza Virus 3, Bovine - isolation & purification
/ Respirovirus Infections - epidemiology
/ Respirovirus Infections - veterinary
/ Respirovirus Infections - virology
/ United States - epidemiology
/ vaccines
/ Veterinary Medicine/Veterinary Science
/ Virology
/ viruses
/ Zoology
