title: Widespread detection and characterization of porcine parainfluenza virus 1 in pigs in the USA.
abstract: Porcine parainfluenza virus 1 (PPIV1) was first identified in 2013 in slaughterhouse pigs in Hong Kong, China. Here, two near-complete genomes were assembled from swine exhibiting acute respiratory disease that were 90.0-95.3% identical to Chinese PPIV1. Analysis of the HN gene from ten additional PPIV1-positive samples found 85.0-95.5% identity, suggesting genetic diversity between strains. Molecular analysis identified 17 out of 279 (6.1%) positive samples from pigs with respiratory disease. Eleven nursery pigs from a naturally infected herd were asymptomatic; however, nasal swabs from six pigs and the lungs of a single pig were quantitative reverse transcriptase (qRT)-PCR positive. Histopathology identified PPIV1 RNA in the nasal respiratory epithelium and trachea. Two serological assays demonstrated seroconversion of infected pigs and further analysis of 59 swine serum samples found 52.5% and 66.1% seropositivity, respectively. Taken together, the results confirm the widespread presence of PPIV1 in the US swine herd.
authors.affiliation: Kansas State Department of Diagnostic Medicine and Pathobiology, Manhattan, Kansas, USA.
authors.forename: Rachel M
authors.initials: RM
authors.lastname: Palinski
authors.affiliation: Kansas State Department of Diagnostic Medicine and Pathobiology, Manhattan, Kansas, USA.
authors.forename: Zhenhai
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Kansas State Department of Diagnostic Medicine and Pathobiology, Manhattan, Kansas, USA.|Kansas State Veterinary Diagnostic Laboratory, Manhattan, Kansas, USA.
authors.forename: Jamie N
authors.initials: JN
authors.lastname: Henningson
authors.affiliation: Kansas State Department of Diagnostic Medicine and Pathobiology, Manhattan, Kansas, USA.
authors.forename: Yuekun
authors.initials: Y
authors.lastname: Lang
authors.affiliation: Kansas State Department of Diagnostic Medicine and Pathobiology, Manhattan, Kansas, USA.
authors.forename: Raymond R R
authors.initials: RRR
authors.lastname: Rowland
authors.affiliation: Kansas State Department of Diagnostic Medicine and Pathobiology, Manhattan, Kansas, USA.
authors.forename: Ying
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Carthage Veterinary Service, Carthage, Illinois, USA.
authors.forename: John
authors.initials: J
authors.lastname: Prickett
authors.affiliation: Department of Veterinary Diagnostic and Population Animal Medicine, Iowa State University, Ames, Iowa, USA.
authors.forename: Phillip C
authors.initials: PC
authors.lastname: Gauger
authors.affiliation: Kansas State Veterinary Diagnostic Laboratory, Manhattan, Kansas, USA.|Kansas State Department of Diagnostic Medicine and Pathobiology, Manhattan, Kansas, USA.
authors.forename: Ben M
authors.initials: BM
authors.lastname: Hause
mesh_terms: D000818:Animals; D016000:Cluster Analysis; D016679:Genome, Viral; D006651:Histocytochemistry; D008969:Molecular Sequence Data; D009297:Nasal Mucosa / Q000473:pathology / Q000821:virology; D010222:Parainfluenza Virus 1, Human / Q000302:isolation & purification*; D018184:Paramyxoviridae Infections / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D010802:Phylogeny; D012367:RNA, Viral / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D012141:Respiratory Tract Infections / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D017422:Sequence Analysis, DNA; D017385:Sequence Homology; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology* / Q000821:virology*; D014132:Trachea / Q000473:pathology / Q000821:virology; D014481:United States / Q000453:epidemiology; D014773:Virology / Q000379:methods
chemical_list: D012367:RNA, Viral