Korean Journal of Veterinary Research (대한수의학회지)

The Korean Society of Veterinary Science (대한수의학회)
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Study on Immunological Response on Salmonella gallinarum in Immunosuppressed Chickens

면역억압계군에서 Salmonella gallinarum 감염에 대한 면역반응

  • Kim, Gye-Yeup (College of Oriental Medicine, Dongshin University) ;
  • Lim, Jae-Hyang (Research Institute of Veterinary Medicine, Chonnam National University) ;
  • Koh, Hong-Bum (Research Institute of Veterinary Medicine, Chonnam National University) ;
  • Cho, Kyoung-Oh (Research Institute of Veterinary Medicine, Chonnam National University) ;
  • Kim, Tae-Youl (College of Oriental Medicine, Dongshin University) ;
  • Oh, Myoung-Hwa (College of Oriental Medicine, Dongshin University)
  • Accepted : 2002.06.08
  • Published : 2002.09.30
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Abstract

The immune response against Salmonella gallinarum infection was investigated in immunosuppresed chickens. Newly hatched chickens were treated with cyclophosphamide at the first and second day after birth and were challenged intraperitoneally with S gallinarum ($1{\times}10^7CFU/m{\ell}$) on day 6. Group 1, Immunosuppresed and Challenged group, was treated with cyclophaiphamide and challenged with S gallinarum; group 2, Immunosuppressed group, was only treated with cyclophsphamide; group 3, Challenged group, was only challenged with S gallinarum; group 4, Control group. In each group, the localization of lymphocytes of the lymphoid organs and intestine was immunohistochemically compared using a variety of monoclonal antiboies ($CD4^+$, $CD8^+$, and B lymphocyte). Also, S gallinarum were assessed by Maccallum-Goodpasture stain and immunohistochemical analysis in the paraffin-embedded intestinal tissues. In S gallinarum challenged chickens, $CD4^+$ and $CD8^+$ lymphocytes of the intestinal organs such as duodenum, jejunum, ileum and colon were increased. However, in cyclophophamide treated chickens, $CD4^+$ and $CD8^+$ lymphocytes and especially B lymphocytes of the lymphoid organs such as thymus, spleen, and bursa of Fabricius were dramatically decreased. These results suggest that cyclophsophamide is an immunosuppressive agent that especially causes depletion of B lymphocytes, suppress humoral immunity and eventually suppresses avian immune responses. Its protection against S gallinarum infection is mainly dependent on both cell-mediated mechanism and the humoral immune response.

Keywords

References

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