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Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine
Dissertation (MSc)--University of Pretoria, 2015.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2016
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| _version_ | 1867613658280886272 |
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| access_status_str | Open Access |
| author2 | Jansen van Rensburg, Christine |
| author_browse | Jansen van Rensburg, Christine |
| author_facet | Jansen van Rensburg, Christine |
| collection | Thesis |
| dc_rights_str_mv | © 2016, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/53496 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:38.583Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/53496 Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine Jansen van Rensburg, Christine stenelleg@gmail.com Gous, R.M. Viljoen, J. Greaves, Stenelle UCTD Weaner piglets Tryptophan supplementation Threonine supplementation Growth performance Immune response Gut health Amino acid metabolism Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-03 Natural and agricultural sciences theses SDG-12 Dissertation (MSc)--University of Pretoria, 2015. Post-weaning mortality has a major economic implication for pig producers. Post-weaning stress is influenced by a number of factors, including the piglets inherent ability and physiological mechanisms to adapt to the new environment. Various amino acids, including threonine, tryptophan and glutamine, have been shown to have a positive effect on the immune system. Higher inclusion levels than current commercial standards of threonine, tryptophan or glutamine and different combinations of these, were mixed into a basal weaner diet to create eight dietary treatments. 48 crossbred piglets (Landrace x Large White) were included in a 28 day growth trail shortly after wean, with six piglets per treatment. Body weight gain, feed intake and feed conversion efficiency (FCE) were measured weekly. At the onset of the trial, piglets were injected with a 10% ovine erythrocyte suspension as an immune challenge. Blood samples from each piglet were collected at 7 day intervals to obtain antibody titre values against ovine erythrocytes. In general, amino acid concentrations used in this study did not result in significant differences (P>0.05) between treatments except for a significant decrease in both body weight gain and FCE when higher concentrations of threonine were fed. However, higher antibody values against sheep erythrocytes were noted in piglets when they received additional threonine in their feed (P>0.05). The results of this trial were not conclusive, but indicated a negative impact of high threonine levels on the production performance of the piglets, while simultaneously improving the production of antibodies against foreign protein molecules, which could support the health of piglets during the post-weaning period. bs2026 Animal and Wildlife Sciences MSc Unrestricted SDG-02: Zero hunger SDG-03: Good health and well-being SDG-12: Responsible consumption and production 2016-07-01T10:33:05Z 2016-07-01T10:33:05Z 2016-04-15 2015 Dissertation Greaves, S 2016, Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/53496> A2016 http://hdl.handle.net/2263/53496 en © 2016, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Weaner piglets Tryptophan supplementation Threonine supplementation Growth performance Immune response Gut health Amino acid metabolism Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-03 Natural and agricultural sciences theses SDG-12 Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine |
| title | Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine |
| title_full | Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine |
| title_fullStr | Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine |
| title_full_unstemmed | Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine |
| title_short | Growth and immunity of weaner piglets supplemented with dietary tryptophan, threonine and glutamine |
| title_sort | growth and immunity of weaner piglets supplemented with dietary tryptophan threonine and glutamine |
| topic | UCTD Weaner piglets Tryptophan supplementation Threonine supplementation Growth performance Immune response Gut health Amino acid metabolism Natural and agricultural sciences theses SDG-02 Natural and agricultural sciences theses SDG-03 Natural and agricultural sciences theses SDG-12 |
| url | http://hdl.handle.net/2263/53496 |