title: Three new isolates of porcine respiratory coronavirus with various pathogenicities and spike (S) gene deletions.
abstract: Three new isolates of porcine respiratory coronavirus (PRCV) were isolated and partially characterized. These PRCV isolates showed a selective tropism for respiratory tissue and were antigenically related to transmissible gastroenteritis virus. PCR amplification of the 5' half of the spike (S) genes of the three PRCV isolates indicated that a large deletion, characteristic of PRCV, was present. By using cDNA probes specific for the transmissible gastroenteritis virus S gene, the PCR products were shown to be specific in a Southern blot. The three new PRCV isolates were shown to vary in S gene deletion size. In a separate study, these isolates have also been shown to vary in pathogenicity. These new PRCV isolates should serve as important tools in gaining a better understanding of the pathogenesis of coronavirus infections.
authors.affiliation: Veterinary Medical Research Institute, Iowa State University, Ames 50011.
authors.forename: E M
authors.initials: EM
authors.lastname: Vaughn
authors.forename: P G
authors.initials: PG
authors.lastname: Halbur
authors.forename: P S
authors.initials: PS
authors.lastname: Paul
mesh_terms: D000818:Animals; D001483:Base Sequence; D017934:Coronavirus / Q000235:genetics* / Q000472:pathogenicity; D018352:Coronavirus Infections / Q000662:veterinary* / Q000821:virology; D017353:Gene Deletion; D008562:Membrane Glycoproteins / Q000235:genetics*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000662:veterinary; D013045:Species Specificity; D064370:Spike Glycoprotein, Coronavirus; D013552:Swine; D013553:Swine Diseases / Q000821:virology*; D005760:Transmissible gastroenteritis virus / Q000235:genetics / Q000276:immunology; D014759:Viral Envelope Proteins / Q000235:genetics*
chemical_list: D008562:Membrane Glycoproteins; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins