Establishment of serial persistent infections with bovine viral diarrhoea virus in cattle and sheep and changes in epitope expression related to host species

Establishment of serial persistent infections with bovine viral diarrhoea virus in cattle and... A pestivirus was transmitted by contact from a persistently infected (P.I.) bullock to pregnant sheep. This resulted in the birth of EI. lambs, one of which in turn was able to transmit virus by contact to pregnant cattle. Two of these animals gave birth to EI. calves, from one of which the virus was again transmitted by contact with pregnant sheep, leading to another generation of EI. lambs. The expression of one or more epitopes on the E2 glycoprotein of the viruses isolated from this series of alternate cattle-sheep transmissions appeared to depend on the host species. Thus, several monoclonal antibodies which bound strongly to, and neutralised, viruses isolated from the bovine hosts, failed to bind or neutralise in the case of sheep isolates. The viral consensus sequences of the E2 gene as well as parts of the 5’ untranslated region and of the NPro and capsid genes were compared between the different isolates. This revealed a high degree of genetic stability. However, a single codon change at amino acid position 9 of the E2 gene correlated with and was able to cause the loss of particular epitopes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Establishment of serial persistent infections with bovine viral diarrhoea virus in cattle and sheep and changes in epitope expression related to host species

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Publisher
Springer Journals
Copyright
Copyright © 1997 by Springer-Verlag
Subject
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050050129
Publisher site
See Article on Publisher Site

Abstract

A pestivirus was transmitted by contact from a persistently infected (P.I.) bullock to pregnant sheep. This resulted in the birth of EI. lambs, one of which in turn was able to transmit virus by contact to pregnant cattle. Two of these animals gave birth to EI. calves, from one of which the virus was again transmitted by contact with pregnant sheep, leading to another generation of EI. lambs. The expression of one or more epitopes on the E2 glycoprotein of the viruses isolated from this series of alternate cattle-sheep transmissions appeared to depend on the host species. Thus, several monoclonal antibodies which bound strongly to, and neutralised, viruses isolated from the bovine hosts, failed to bind or neutralise in the case of sheep isolates. The viral consensus sequences of the E2 gene as well as parts of the 5’ untranslated region and of the NPro and capsid genes were compared between the different isolates. This revealed a high degree of genetic stability. However, a single codon change at amino acid position 9 of the E2 gene correlated with and was able to cause the loss of particular epitopes.

Journal

Archives of VirologySpringer Journals

Published: May 1, 1997

References

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