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Browsing by Author "Du Preez, M"

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A comparison of the cost associated with pollution prevention measures to that required to treat polluted water resources

Author: Oelofse, Suzanna HH ; Roux, S ; De Lange, Willem J ; Mahumani, B ; Le Roux, Wouter J ; Du Preez, M ; Greben, HA ; Steyn, Maronel Date: Mar 2012 Pollution of water resources is largely as a result of human activity and therefore could be prevented to a large degree. The quality of our water resources is deteriorating and downstream water users have to deal with the pollution impacts ... Read more
Defining episodes of diarrhoea: results from a three-country study in Sub Saharan Africa

Author: Wright, James A ; Gundry, SW ; Conroy, R ; Wood, D ; Du Preez, M ; Ferro-Luzzi, A ; Genthe, Bettina ; Kirimi, M ; Moyo, S ; Mutisi, C ; Ndamba, J ; Potgieter, N Date: Mar 2006 The study was conducted to assess the effect of definition of episode on diarrhoeal morbidity and to develop a means of adjusting estimates of morbidity for the definition of episode used. This paper reports on a cohort study of 374 children, ... Read more
Detection of toxigenic vibrio cholera from environmental water samples by an enrichment broth cultivation-pit-stop semi-nested PCR procedure

Author: Theron, J ; Cilliers, Jacques E ; Du Preez, M ; Brozel, VS ; Venter, SN Date: Sep 2000 A pit-stop semi-nested PCR assay for the detection of toxigenic Vibrio cholerae in environmental water samples was developed and its performance evaluated. The PCR technique amplifies sequences within the cholera toxin operon specific for ... Read more
EO2HEAVEN: mitigating environmental health risks

Author: Le Roux, Wouter J ; Du Preez, M ; De Klerk, L ; Hohls, D ; McFerren, G ; Vahed, Anwar ; Van der Merwe, Martina R ; Van Zyl, T Date: 2013 EO2HEAVEN has the primary objective to contribute to a better understanding of the complex relationships between environmental changes and their impact on human health. To achieve this, the project followed a multidisciplinary and user-driven ... Read more
Focus on CSIR research in water resources: Modelling complex biophysical processes associated with diseases. Case study: the ecology of vibriocholerae in the Mozambican channel

Author: Du Preez, M Date: Aug 2007 Cholera is an acute bacterial infection of the small intestine, caused by Vibriocholerae and characterised by massive diarrhoea with rapid and severe depletion of body fluids and salts. The bacteria enter the body through the mouth, by ingestion ... Read more
Focus on the CSIR research in pollution waste: Safe drinking water from the sun

Author: Du Preez, M Date: Aug 2007 The Water for Health group at the CSIR represents South Africa in an international project to demonstrate solar disinfection (SODIS) of drinking water. This project is set to demonstrate that SODIS is an effective, appropriate and acceptable ... Read more
High compliance randomized controlled field trial of solar disinfection of drinking water and its impact on childhood diarrhea in rural Cambodia

Author: McGuigan, KG ; Samaiyar, P ; Du Preez, M ; Conroy, RM Date: Sep 2011 Recent solar disinfection (SODIS) studies in Bolivia and South Africa have reported compliance rates below 35% resulting in no overall statistically significant benefit associated with disease rates. In this study, the authors report the ... Read more
Randomized intervention study of solar disinfection of drinking water in the prevention of dysentery in Kenyan children aged under 5 years

Author: Du Preez, M ; Conroy, RM ; Ligondo, S ; Hennessy, J ; Elmore-Meegan, M ; Soita, A ; McGuigan, KG Date: Sep 2011 The authors report the results of a randomized controlled intervention study (September 2007 to March 2009) investigating the effect of solar disinfection (SODIS) of drinking water on the incidence of dysentery, nondysentery diarrhea, and ... Read more
Sensitive seminested PCR method for the detection of Shigella in spiked environmental water samples

Author: Theron, J ; Morar, D ; Du Preez, M ; Brozel, VS ; Venter, SN Date: Mar 2001 A rapid seminested polymerase chain reaction (PCR) method for the specific, sensitive detection of virulent Shigella spp. in spiked environmental water samples was developed. A set of primers specific for the invasion plasmid antigen gene ... Read more
Solar disinfection of drinking water in the prevention of dysentery in South African children under 5 years: the role of participant motivation

Author: Du Preez, M ; Mcguigan, K ; Conroy, RM Date: Nov 2010 This 1-year randomized controlled trial investigated the effect of SODIS of drinking water and motivation on the incidence of dysentery and nondysentery diarrhea among children of age 6 months to 5 years living in periurban communities in ... Read more
Solar water disinfection (SODIS): A review from bench-top to roof-top

Author: McGuigan, KG ; Conroy, RM ; Mosler, H-J ; Du Preez, M ; Ubomba-Jaswa, Eunice ; Fernandez-Ibanez, P Date: Oct 2012 Solar water disinfection (SODIS) has been known for more than 30 years. The technique consists of placing water into transparent plastic or glass containers (normally 2 L PET beverage bottles) which are then exposed to the sun. Exposure times ... Read more
Studies evaluating the applicability of utilizing the same concentration techniques for the detection of protozoan parasites and viruses in water

Author: Kfir, R ; Hilner, C ; Du Preez, M ; Bateman, B Date: 1995 In this study concentration techniques regularly used for viral detection; i.e. flat-bed ultra-filtration and filterite cartridge filtration, were evaluated for their efficacies in the recovery of protozoan parasites from water. Recovery of ... Read more
Studies on the prevalence of giardia cysts and cryptosporidium oocysts in South-African water

Author: Kfir, R ; Hilner, C ; Du Preez, M ; Bateman, B Date: 1995 The levels of Giardia cysts and Cryptosporidium oocysts in 650 environmental water samples ere investigated. Cysts and oocysts were found in all types of water tested. The presence of Giardia cysts exceeded Cryptosporidium oocysts both in the ... Read more
A survey of Vibrio cholerae O1 and O139 in estuarine waters and sediments of Beira, Mozambique

Author: Du Preez, M ; Van der Merwe, Martina R ; Cumbana, A ; Le Roux, Wouter J Date: Oct 2010 This study determined whether the estuarine and freshwater environment in Beira, Mozambique, serves as a reservoir of Vibrio cholerae O1 and O139. Ninety-nine estuarine water samples were collected at 6 sites in Beira. An additional 54 samples ... Read more
Use of monoclonal-antibodies for the detection of fecal bacteria in water

Author: Kfir, R ; Du Preez, M ; Genthe, Bettina Date: 1993 Monoclonal antibodies (MAbs) against heat-killed Escherichia coli and Klebsiella oxytoca originating from wastewater effluent were raised in BALB/C mice. The fusion was highly successful and three hybridomas cloned were selected to study the ... Read more

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Browsing by Author "Du Preez, M"

Browsing by Author "Du Preez, M"

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