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Dr. Hossam Abdel Naby Mahmoud Abdel Hamid :: Publications: |
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| Title: | Assessment of the virulence and immunogenicity of Edwardsiella ictaluri fhuCD mutant |
| Authors: | H Abdelhamed, JJ Liu, N Dahali, AA Shaheen, AA Amany, ML Lawrence, A Karsi |
| Year: | 2015 |
| Keywords: | eywords: For example: Medicine;Irrigation;Geodetic Networks Journal: Proceedings of the 5th Global Fisheries and Aquaculture Research Conference, Faculty of Agriculture, Cairo University, Giza Volume: Issue: Pages: 185-198 Publisher: Massive Conferences and Trade Fairs Paper Link: Upload Full Paper: Choose File *Your paper will be available for all SAVE CANCEL Google ScholarAcdemia.eduResearch GateLinkedinFacebookTwitterGoogle PlusYoutubeWordpressvirulence in channel catfish. Key word: Edwardsiella ictaluri; fhuCD mutant; virulence |
| Journal: | Proceedings of the 5th Global Fisheries and Aquaculture Research Conference, Faculty of Agriculture, Cairo University, Giza |
| Volume: | Not Available |
| Issue: | Not Available |
| Pages: | 185-198 |
| Publisher: | Massive Conferences and Trade Fairs |
| Local/International: | International |
| Paper Link: | Not Available |
| Full paper | Hossam Abdel Naby Mahmoud Abdel Hamid_2-ASSESSMENT OF THE VIRULENCE AND IMMUNOGENICITY OF.pdf |
| Supplementary materials | Not Available |
| Abstract: |
The fhuCD system and its importance in Edwardsiella ictaluri virulence have not been studied yet. Previously, we constructed E. ictaluri ΔfhuCD mutants by in-frame deletion and allelic exchange. In the present study, the virulence of the EiΔfhuCD mutant was evaluated by immersion challenge using Specific Pathogen-Free channel catfish fingerlings and the ability of this mutant to protect the channel catfish against E. ictaluri was evaluated. Also, the ability of EiΔfhuCD mutant to grow in the presence of iron chelator 2,2’ Dipyridyl was assayed. The results indicated that little or no attenuation in EiΔfhuCD (40.00% mortality) was observed as compared to the parent E. ictaluri (%46.42). The channel catfish treated with EiΔfhuCD mutant showed high relative percent survival rates (average 94.72%) after re-challenge with E. ictaluri wild type. It was also found that the deletion of the E. ictaluri fhuCD operon did not affect E. ictaluri growth under iron-replete and iron-restricted conditions. Taken together, such data suggest that fhuCD operon is partial essential in E. ictaluri full. |
