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Clinical and Diagnostic Laboratory Immunology, September 2002, p. 1010-1013, Vol. 9, No. 5
1071-412X/02/$04.00+0     DOI: 10.1128/CDLI.9.5.1010-1013.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Antibody Responses of Cattle with Respiratory Coronavirus Infections during Pathogenesis of Shipping Fever Pneumonia Are Lower with Antigens of Enteric Strains than with Those of a Respiratory Strain

Xiao-Qing Lin,,{dagger} Kathy L. O'Reilly,* and Johannes Storz

Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana

Received 18 March 2002/ Returned for modification 17 May 2002/ Accepted 3 June 2002

The serum antibody responses of cattle with respiratory coronavirus infections during the pathogenesis of shipping fever pneumonia were analyzed with different bovine coronavirus antigens, including those from a wild-type respiratory bovine coronavirus (RBCV) strain (97TXSF-Lu 15-2) directly isolated from lung tissue from a fatally infected bovine, a wild-type enteropathogenic bovine coronavirus (EBCV) strain (Ly 138-3), and the highly cell culture-adapted, enteric prototype strain (EBCV L9-81). Infectivity-neutralizing (IN) and hemagglutinin-inhibiting (HAI) activities were tested. Sequential serum samples, collected during the onset of the respiratory coronavirus infection and at weekly intervals for 5 weeks thereafter, had significantly higher IN and HAI titers for antigens of RBCV strain 97TXSF-Lu15-2 than for the wild-type and the highly cell culture-adapted EBCV strains, with P values ranging from <0.0001 to 0.0483. The IN and HAI antibody responses against the two EBCV strains did not differ significantly, but the lowest titers were detected with EBCV strain L9-81.

* Corresponding author. Mailing address: Department of Pathobiological Sciences, Louisiana State University, School of Veterinary Medicine, Baton Rouge, LA 70803. Phone: (225) 578-9679. Fax: (225) 578-9701. E-mail: koreilly{at}lsu.edu.

{dagger} Present address: Infectious Disease Division, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pa.

Clinical and Diagnostic Laboratory Immunology, September 2002, p. 1010-1013, Vol. 9, No. 5
1071-412X/02/$04.00+0     DOI: 10.1128/CDLI.9.5.1010-1013.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.





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