Recombinant Canine Coronaviruses Related to Transmissible Gastroenteritis Virus of Swine Are Circulating in Dogs

Author:

Decaro Nicola1,Mari Viviana1,Campolo Marco1,Lorusso Alessio1,Camero Michele1,Elia Gabriella1,Martella Vito1,Cordioli Paolo2,Enjuanes Luis3,Buonavoglia Canio1

Affiliation:

1. Department of Public Health and Animal Sciences, Faculty of Veterinary Medicine, Valenzano (Bari), Italy

2. Istituto Zooprofilattico Sperimentale di Lombardia ed Emilia Romagna, via A. Bianchi 9, 25124 Brescia, Italy

3. Centro Nacional de Biotecnologia, Department of Molecular and Cell Biology, Campus Universidad Autonoma, Cantoblanco (Madrid), Spain

Abstract

ABSTRACT Four canine coronavirus type II (CCoV-II) strains were identified in the guts and internal organs of pups which had died of acute gastroenteritis. The CCoV-II strains were strictly related to porcine transmissible gastroenteritis virus (TGEV) in the N-terminal domain of the spike protein, whereas in the other parts of the genome, a higher genetic relatedness to recent CCoV-II isolates was observed. Experimental infection of dogs with a TGEV-like isolate induced mild gastroenteritis without any systemic involvement. By virus neutralization tests, antigenic differences between reference and TGEV-like CCoVs were found. Our data support the potential recombinant origin of the TGEV-like CCoVs.

Publisher

American Society for Microbiology

Subject

Virology,Insect Science,Immunology,Microbiology

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