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Severe outbreak of bovine coronavirus infection in dairy cattle during the warmer season.


ABSTRACT: A severe outbreak of enteric and respiratory disease associated with bovine coronavirus (BCoV) infection is described. The outbreak occurred in a dairy herd of southern Italy in the first decade of September 2006, when summer temperatures were still recorded, affecting calves, heifers and adult cows, with a marked decrease in milk production. By virus isolation and RT-PCR targeting the S gene, BCoV was identified as the etiological agent of the outbreak, whereas bacteriological, parasitological and toxicological investigations failed to detect other causes of disease. BCoV strains with 99-100% nucleotide identity in the S gene were isolated from nasal, ocular and rectal swabs, thus proving the absence of separate clusters of virus on the basis of tissue tropism. Sequence analysis of the haemagglutination-esterase and spike proteins of the strain detected in one rectal sample (339/06) showed a high genetic relatedness with recent BCoV isolates (98-99% amino acid identity), with several unique amino acid substitutions in the S protein. The BCoV outbreak described in this paper presents interesting aspects: (i) the occurrence of a severe form of disease in the warmer season; (ii) the simultaneous presence of respiratory and enteric disease; (iii) the involvement of young as well as adult cattle.

SUBMITTER: Decaro N 

PROVIDER: S-EPMC7117129 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature

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Severe outbreak of bovine coronavirus infection in dairy cattle during the warmer season.

Decaro Nicola N   Mari Viviana V   Desario Costantina C   Campolo Marco M   Elia Gabriella G   Martella Vito V   Greco Grazia G   Cirone Francesco F   Colaianni Maria Loredana ML   Cordioli Paolo P   Buonavoglia Canio C  

Veterinary microbiology 20070628 1-3


A severe outbreak of enteric and respiratory disease associated with bovine coronavirus (BCoV) infection is described. The outbreak occurred in a dairy herd of southern Italy in the first decade of September 2006, when summer temperatures were still recorded, affecting calves, heifers and adult cows, with a marked decrease in milk production. By virus isolation and RT-PCR targeting the S gene, BCoV was identified as the etiological agent of the outbreak, whereas bacteriological, parasitological  ...[more]

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