title: Molecular investigation of a full-length genome of a Q1-like IBV strain isolated in Italy in 2013.
abstract: Since 1996 a new Infectious Bronchitis virus (IBV) genotype, referred to as Q1, circulated in China and was reported for the first time in Italy in 2011, associated with an increase of mortality, kidney lesions and proventriculitis. During northern Italian outbreak of respiratory disease in a broiler flock in 2013, an IBV strain was detected by RT-PCR and characterized as Q1-like based on partial S1 sequence. The virus was isolated and named γCoV/Ck/Italy/I2022/13. All coding regions of the isolate were sequenced and compared with 130 complete genome sequences of IBV and TCoV, downloaded from ViPR. This showed the highest identity with a Chinese strain CK/CH/LDL/97I (p-distance=0.044). To identify potential recombination events a complete genome SimPlot analysis was carried out which revealed the presence of possible multiple recombination events, but the minor parent strains remained unknown. A phylogenetic analysis of the complete S1 gene was performed using all complete S1 sequences available on ViPR and showed the isolate clustered with an Q1-like strain isolated in Italy in 2011 (p-distance=0.004) and a group of Chinese Q1-like strains isolated from the mid 90's (p-distance equal or higher than 0.001). It could be hypothesized that the isolate descended from the Italian 2011 Q1-like strain or was the result of a separate introduction from China through commercial trade or migratory birds; but the data currently available does not distinguish between these possibilities.
authors.affiliation: Department of Animal Medicine, Production and Health, University of Padua, Viale dell'università, 16, 35020, Legnaro (PD), Italy. Electronic address: giovanni.franzo@unipd.it.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Franzo
authors.affiliation: Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia (BO), Italy.
authors.forename: Valeria
authors.initials: V
authors.lastname: Listorti
authors.affiliation: Department of Infection Biology, University of Liverpool, Leahurst Campus, Neston, Cheshire CH64 7TE, United Kingdom.
authors.forename: Clive J
authors.initials: CJ
authors.lastname: Naylor
authors.affiliation: Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia (BO), Italy.
authors.forename: Caterina
authors.initials: C
authors.lastname: Lupini
authors.affiliation: Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia (BO), Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Laconi
authors.affiliation: Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia (BO), Italy.
authors.forename: Viviana
authors.initials: V
authors.lastname: Felice
authors.affiliation: Department of Animal Medicine, Production and Health, University of Padua, Viale dell'università, 16, 35020, Legnaro (PD), Italy.
authors.forename: Michele
authors.initials: M
authors.lastname: Drigo
authors.affiliation: Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia (BO), Italy.
authors.forename: Elena
authors.initials: E
authors.lastname: Catelli
authors.affiliation: Department of Animal Medicine, Production and Health, University of Padua, Viale dell'università, 16, 35020, Legnaro (PD), Italy.
authors.forename: Mattia
authors.initials: M
authors.lastname: Cecchinato
mesh_terms: D000818:Animals; D002645:Chickens; D016000:Cluster Analysis; D018352:Coronavirus Infections / Q000453:epidemiology / Q000821:virology; D016679:Genome, Viral; D001351:Infectious bronchitis virus / Q000235:genetics* / Q000302:isolation & purification*; D007558:Italy / Q000453:epidemiology; D008969:Molecular Sequence Data; D010802:Phylogeny; D011201:Poultry Diseases / Q000453:epidemiology / Q000821:virology; D012367:RNA, Viral / Q000235:genetics*; D017422:Sequence Analysis, DNA; D017385:Sequence Homology
chemical_list: D012367:RNA, Viral
keywords: Complete genome; Genotype; IBV; Phylogenesis; Recombination