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A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa
Dissertation (MSc)--University of Pretoria, 2018.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2019
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| _version_ | 1867613660177760256 |
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| access_status_str | Open Access |
| author2 | Etter, Eric Marcel Charles |
| author_browse | Etter, Eric Marcel Charles |
| author_facet | Etter, Eric Marcel Charles |
| collection | Thesis |
| dc_rights_str_mv | © 2019 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, 2018. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/70588 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:40.578Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| 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:2263/70588 A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa Etter, Eric Marcel Charles vincent.henwood@gmail.com Abernethy, D.A. Henwood, Vincent Charl UCTD Veterinary science theses SDG-01 Veterinary science theses SDG-02 SDG-01: No poverty SDG-02: Zero hunger Dissertation (MSc)--University of Pretoria, 2018. A risk assessment was conducted for Salmonella enteritidis (SE) in the broiler production chain of the Western Cape of South Africa, using a literature review, historical data analysis, microbiological sampling from abattoirs and questionnaire responses. A questionnaire to characterise the risk pathway in the broiler chain was developed based on a review of the literature. Spatio-temporal analysis was conducted using historical data of reported SE outbreaks. The data showed spatio-temporal clustering, however, the analysis was not correct for groups of farms that form part of the same organisation. Neck skin samples were collected from five abattoirs and tested for salmonella. In total, 499 samples were collected, representing 46 broiler farms of which nine (20%) were positive. Salmonella positive cultures (2.81%) were serotyped. No SE was identified during the study. The questionnaire was completed for all stages of the broiler production chain. Significant risk factors were found using univariate analysis (Odds Ratio,OR). The significant risk factors identified by OR were further analysed using principal component analysis (PCA). The factors moving with or opposing, farm positivity were analysed using logistic regression and one layer farm was found to be a significant factor. The farms receiving eggs or chicks from that layer farm had a number of factors that were found to be significant using OR and therefore the presence of this layer farm could be a representation of these factors at the broiler farm level. SE was not identified in the samples collected from abattoirs, a number of other non-typhoidal Salmonella subspecies enterica were isolated. Given the high rates of immunosuppressive diseases within the South African population, it is important for broiler producers to be aware of the zoonotic potential of non-typhoidal Salmonella and continually improve their control measures. Veterinary Tropical Diseases MSc Unrestricted 2019-07-08T09:46:56Z 2019-07-08T09:46:56Z 2019/04/04 2018 Dissertation Henwood, VC 2018, A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/70588> A2019 http://hdl.handle.net/2263/70588 en © 2019 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 Veterinary science theses SDG-01 Veterinary science theses SDG-02 SDG-01: No poverty SDG-02: Zero hunger A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa |
| title | A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa |
| title_full | A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa |
| title_fullStr | A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa |
| title_full_unstemmed | A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa |
| title_short | A qualitative risk assessment of Salmonella enteritidis in the broiler production chain in the Western Cape South Africa |
| title_sort | qualitative risk assessment of salmonella enteritidis in the broiler production chain in the western cape south africa |
| topic | UCTD Veterinary science theses SDG-01 Veterinary science theses SDG-02 SDG-01: No poverty SDG-02: Zero hunger |
| url | http://hdl.handle.net/2263/70588 |