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Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot
Dissertation (MSc)--University of Pretoria, 2017.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2018
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| _version_ | 1867613531356004352 |
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| access_status_str | Open Access |
| author2 | Abernethy, D.A. |
| author_browse | Abernethy, D.A. |
| author_facet | Abernethy, D.A. |
| collection | Thesis |
| dc_rights_str_mv | © 2018 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, 2017. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/65520 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:37.672Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| 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:2263/65520 Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot Abernethy, D.A. dirkv@lantic.net Dorny, Pierre Verwoerd, Dirk J. UCTD Tapeworms Veterinary parasitology Bovine cysticercosis Cattle -- Parasites Veterinary science theses SDG-03 Veterinary science theses SDG-11 SDG-03: Good health and well-being SDG-11: Sustainable cities and communities Dissertation (MSc)--University of Pretoria, 2017. Taeniid tapeworms have very simple lifecycles with the adult stage developing in the intestine of the obligate human host, after the ingestion of viable cysticerci in raw/undercooked meat. Bovine Cysticercosis follows epidemic outbreak patterns in a cattle feedlot. These peaks/point source epidemics have been related to contaminated feed or water, and/or to specific infected workers. Taeniosis in humans caused by T. saginata is a relatively mild condition; easy to control through regular deworming and improved personal sanitation practices, while positive cysticercosis carcasses caused by T. saginata result in very costly decontamination processes through freezing, that have a huge negative financial impact on the beef industry. This study is a Retrospective Analysis of all abattoir data from 645 634 Karan Beef feedlot cattle slaughtered during 1 January 2009 to 31 December 2010. The main objective was to establish a scientific basis for the development of an effective cysticercosis risk avoidance and impact mitigation strategy at this feedlot. Positive cysticercosis carcasses based on standard meat inspection procedures by independent meat inspectors at the Karan Beef Balfour Abattoir were related to their individual carcass classification and feedlot production histories as well as group/lot identities. A total of 17 561 cysticercosis infected carcasses were found, giving an overall prevalence of 2.72%. Data were examined using Descriptive Univariate and Multivariable Analyses, followed by detailed univariate analyses of putative risk factors. Individual risk factors were: Sex [Male (Bulls & Steers) vs Heifers], Arrival live weight groups (4), Breed, Days on Feed. Lot based risk factors were: Buyer, Geographical origin/loading point, purchase channel, farm type, number of measles/lot, rainfall season when purchased, drinking water turbulence vs stagnation during their feeding period, risk period per geographical area (high vs low) using high/low population density areas during high/low rainfall periods as categories, Bovine Respiratory Disease Risk as proxy indicator for cysticercosis. Cattle sourced via speculators and from small farms or communal herds as well as from certain dry areas where humans and cattle congregate/concentrate around limited water sources and similarly collection/concentration strategies such as holding stations, carried a significantly higher cysticercosis risk compared to controls. In addition cattle that arrived at a younger age (weight class) as well as cattle fed through the rainy season carried a higher risk. All of these factors indicate practical control measures in terms of purchase strategies, periods of more important staff deworming programmes and even future targeted vaccination strategies. Veterinary Tropical Diseases MSc Unrestricted 2018-07-13T06:48:26Z 2018-07-13T06:48:26Z 2018/04/20 2017 Dissertation Verwoerd, DJ 2017, Risk Factors for Bovine cysticercosis in a large commercial South African cattle feedlot, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/65520> A2018 http://hdl.handle.net/2263/65520 en © 2018 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 Tapeworms Veterinary parasitology Bovine cysticercosis Cattle -- Parasites Veterinary science theses SDG-03 Veterinary science theses SDG-11 SDG-03: Good health and well-being SDG-11: Sustainable cities and communities Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot |
| title | Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot |
| title_full | Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot |
| title_fullStr | Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot |
| title_full_unstemmed | Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot |
| title_short | Risk factors for bovine cysticercosis in a large commercial South African cattle feedlot |
| title_sort | risk factors for bovine cysticercosis in a large commercial south african cattle feedlot |
| topic | UCTD Tapeworms Veterinary parasitology Bovine cysticercosis Cattle -- Parasites Veterinary science theses SDG-03 Veterinary science theses SDG-11 SDG-03: Good health and well-being SDG-11: Sustainable cities and communities |
| url | http://hdl.handle.net/2263/65520 |