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Browsing Veterinary Science by UP Author "Petzer, Inge-Marie"
Now showing items 1-20 of 35
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Phophi, Lufuno; Petzer, Inge-Marie; Qekwana, Daniel Nenene (BioMed Central, 2019-11-26)BACKGROUND : Increased prevalence of antimicrobial resistance, treatment failure, and financial losses have been reported in dairy cows with coagulase-negative Staphylococcus (CoNS) clinical mastitis, however, studies on ...
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Karzis, Joanne; Petzer, Inge-Marie; Donkin, Edward Francis; Naidoo, Vinny; Etter, Eric Marcel Charles (AOSIS OpenJournals, 2019-07-10)South Africa is a large country of approximately 1.22 million km2, made up of nine provinces with three climatic zones. Farming in the country is mostly defined by regional differences. Of the different organisms isolated ...
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Petzer, Inge-Marie; Karzis, Joanne; Van der Schans, Theodorus J.; Watermeyer, Johanna C.; Mitchell-Innes, Norman; Eloff, Stephanie; Fosgate, Geoffrey Theodore (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2012-02-10)The aim of this study was to compare the effects of cryopreservation at approximately -196 °C in liquid nitrogen (N) and freezing at approximately -20 °C in a freezer, on the viability and survival of eight different ...
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Petzer, Inge-Marie; Karzis, Joanne; Meyer, Isabel A.; Van der Schans, Theodorus J. (AOSIS Open Journals, 2013-04-24)The indirect effects of mastitis treatment are often overlooked in cost-benefit analyses, but it may be beneficial for the dairy industry to consider them. The cost of mastitis treatment may increase when the duration ...
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Karzis, Joanne; Petzer, Inge-Marie (Agri Connect, 2012-08)No abstract available.
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Petzer, Inge-Marie; Etter, Eric Marcel Charles; Donkin, Edward Francis; Webb, E.C. (Edward Cottington); Karzis, Joanne (Elsevier, 2017-12)An innovative method was investigated to aid in the elimination of Staphylococcus aureus (S. aureus) intramammary infections (IMI) from dairy herds. A stochastic model explore the economic benefit of three-day or eight-day ...
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Petzer, Inge-Marie; Karzis, Joanne; Lesosky, Maia; Watermeyer, Johanna C.; Badenhorst, Renette (BioMed Central, 2013-03-15)BACKGROUND: Heifers can calve down with intramammary infections (IMI) and udder damage. This will have a negative impact on their longevity, future milk yield and financial return. Co-housed pre-weaned calves that are ...
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Motaung, Thabiso Eric; Petrovski, Kiro R.; Petzer, Inge-Marie; Thekisoe, Oriel; Tsilo, Toi J. (Cambridge University Press, 2017-06)Bovine mastitis is an important animal production disease that affects the dairy industry globally. Studies have estimated the prevalence of this disease in approximately 30% of African countries, with the highest prevalence ...
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Akinboye, Ayodele O.; Famuyide, Ibukun Michael; Petzer, Inge-Marie; McGaw, Lyndy Joy (MDPI, 2023-04)Please read abstract in article.
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Akinboye, Ayodele O.; Makhubu, Fikile N.; Karzis, Joanne; Petzer, Inge-Marie; McGaw, Lyndy Joy (Elsevier, 2024-03)Bovine mastitis is a critical pathology in global dairy herds, causing economic losses due to decreased production and increased culling. The continuous use of conventional antibiotics has led to antimicrobial resistance ...
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Erhabor, Rosemary Chinelo; Erhabor, Joseph Omorogiuwa; Nkadimeng, Sanah Malomile; Petzer, Inge-Marie; Dzoyem, Jean Paul; McGaw, Lyndy Joy (Elsevier, 2024-02)Bovine mastitis, caused mostly by Staphylococcus species, has gained global importance owing to the increasing prevalence of multi-drug resistant bacteria, which comprise a risk to food security and public health. In this ...
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Ogbuadike, Eucharia Chika; Nkadimeng, Sanah Malomile; Igwe, Chima C.; Dzoyem, Jean Paul; Qekwana, Daniel Nenene; Petzer, Inge-Marie; McGaw, Lyndy Joy (Elsevier, 2023-03)Mastitis is a painful inflammatory condition, commonly resulting from infections caused by Staphylococcus aureus and other pathogens. In this study, antimicrobial, anti-biofilm and anti-quorum sensing activities of selected ...
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Karzis, Joanne; Donkin, Edward Francis; Petzer, Inge-Marie (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2007-06)The California Milk Cell Test (CMCT) and somatic cell counts (SCC) on their own were not reliable methods in the identification of subclinical mastitis in the dairy goats studied and should be accompanied by microbiological ...
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Ferreira, Gert M.; Petzer, Inge-Marie (AOSIS Open Journals, 2019-10)Mastitis is the most costly disease of dairy cows. A pro-active approach includes insuring adequate levels of selective trace minerals. The aim of this study was to determine the effect of two different commercially ...
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Petzer, Inge-Marie; Donkin, Edward Francis; Du Preez, E.; Karzis, Joanne; Van der Schans, Theodorus J.; Watermeyer, Johanna C.; Van Reenen, R. (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2008-06)This study investigated the withdrawal periods (WP) of two intramammary antibiotics Cloxamast LC (Intervet SA) and Spectrazol Milking Cow (Schering-Plough Animal Health) in dairy goats and compared them to those recommended ...
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Karzis, Joanne; Donkin, Edward Francis; Petzer, Inge-Marie (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2007-09)The length of the antibiotic withdrawal period after intramammary treatment was influenced by the milk yield of dairy goats during this trial. Shorter withdrawal periods were seen in relatively high yielding dairy goats ...
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Karzis, Joanne; Donkin, Edward Francis; Petzer, Inge-Marie (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2007-09)Intramammary antibiotics are registered and tested for use in dairy cattle. This study investigated withdrawal periods of three intramammary antibiotics (Curaclox LC [Norbrook Pharmacia AH]), Spectrazol Milking Cow ...
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Petzer, Inge-Marie; Lourens, D.C. (Dirk Cornelius); Van der Schans, Theodorus J.; Watermeyer, Johanna C.; Van Reenen, R.; Rautenbach, G.H.; Thompson, P.N. (Peter N.) (South African Veterinary Association, 2009)The objectives of this study were to compare the efficacy of 6 different dry-cow intramammary antimicrobial products for the treatment and prevention of mastitis during the dry period in a well-managed high producing ...
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Petzer, Inge-Marie; Watermeyer, Johanna C.; Konaite, E.F.; Badenhorst, Renette; Mohapi, L.; Malekane, K.S.; Motau, M.C.; Ludike, R.; Karzis, Joanne (Pretoria : University of Pretoria. Faculty of Veterinary Science, Dept. of Production Animal Studies, 2015-08-20)This is an investigation into the validity of the somatic cell count (SCC) test as a diagnostic or survey tool to identify pathogen specific udder infections in cows when used on its own in composite cow milk samples.
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Petzer, Inge-Marie; Konaite, E.F.; Watermeyer, Johanna C.; Badenhorst, Renette; Mohapi, L.; Malekane, K.S.; Motau, M.C.; Ludike, R.; Karzis, Joanne (Pretoria : University of Pretoria. Faculty of Veterinary Science, Dept. of Production Animal Studies, 2015-08-20)This study of quarter and composite cow milk samples investigated the use of somatic cell count (SCC) as a diagnostic tool to test the validity of current SCC threshold of 200 000 cells/ml suggested by industry as ...
Now showing items 1-20 of 35