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Adaptation and Serial Passage of Bovine Coronavirus in an Established Diploid Swine Testicular Cell Line and Subsequent Development of a Modified Live Vaccine

  • Mark W. Welter
Chapter
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 440)

Abstract

A virulent bovine Coronavirus isolate (newborn calf diarrheal) was adapted and serially passaged in an established diploid swine testicular cell line (ST cells). The same cells have been used to produce modified live porcine rotavirus and Coronavirus vaccines that are federally licensed and sold worldwide. Growth of the bovine Coronavirus resulted in cytopathic effect characterized by cellular stranding and subsequent cell lysis. Virus yields were relatively high in the ST cells and active replication was confirmed by immune electron microscopy and immunofluorescence. Adaptation of bovine Coronavirus to a diploid swine cell line has not been previously reported.

Difference cell culture passage levels of bovine coronavirus were evaluated by oral inoculation of clean-catch, colostrum-deprived calves. A passage level of disease associated with virulent passages. The modified live bovine coronavirus vaccine remained safe and efficacious even after 5-backpassages in calves. Further efficacy studies have shown that the modified live bovine coronavirus vaccine significantly protected valves from highly virulent challenges with either winter dysentery or newborn calf diarrheal coronavirus isolates.

Keywords

Serial Passage Villous Atrophy Adult Cattle Master Seed Immune Electron Microscopy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Babiuk, L.A., Sabara, M., and Hudson, G.R., 1985, Rotavirus and Coronavirus infections in animals, Prog. Vet. Microbiol. Immunol. 1: 80–120.PubMedGoogle Scholar
  2. Millane, G., Michaud, L., and Dea, S., 1995, Biological and molecular differentiation between coronaviruses associated with neonatal calf diarrhoea and winter dysentery in adult cattle, Adv. Exp. Med. Biol. 380: 29–33.PubMedCrossRefGoogle Scholar
  3. Saif, L. J., and Theil, K. T. (eds), 1990, Viral diarreheas of man and animals. CRC Press, Boca Raton, Florida.Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Mark W. Welter
    • 1
  1. 1.Oragen L.C.Des MoinesUSA

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