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Viljoen A, Oosthuizen MK. Dim light at night affects the locomotor activity of nocturnal African pygmy mice ( Mus minutoides) in an intensity-dependent manner. Proc Biol Sci 2023; 290:20230526. [PMID: 37072046 PMCID: PMC10113032 DOI: 10.1098/rspb.2023.0526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 03/27/2023] [Indexed: 04/20/2023] Open
Abstract
Rodents are integral components of ecosystems as they provide several important ecosystem services. Despite their importance as prey, pollinators and seed distributors, African rodents are largely understudied. The effect of anthropogenic changes such as artificial light at night extends past urban areas to peri-urban and rural habitats, and can have profound effects on entire ecosystems. We investigated the effect of dim light at night (dLAN) on the locomotor activity rhythms of the African pygmy mouse (Mus minutoides). Pygmy mice showed a dramatic, intensity-dependent reduction in their locomotor activity when subjected to dLAN, which was accompanied by a delay in the activity onset. We also considered masking responses with a dark pulse (DP) during the day and a light pulse at night. All animals became inactive in response to a light pulse during the night, whereas approximately half of the animals showed activity during a DP in the day. Our results suggest that the African pygmy mouse is highly sensitive to light and that their activity is strongly masked by light. In their natural environment, vegetation could shield pygmy mice against high light levels; however, other anthropogenic disturbances can alter the behaviour of these animals and could affect their survival.
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Affiliation(s)
- A. Viljoen
- Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
| | - M. K. Oosthuizen
- Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
- Mammal Research Institute, University of Pretoria, Pretoria 0002, South Africa
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Clarke A, Bodini S, Douglas L, Catapano A, De Luca L, Hollstein T, Payne J, Pirro M, Viljoen A, Vogt A, Horne R. A behavioural science research programme to understand the barriers to achieving recommended LDL cholesterol goals. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Hendriks SL, Viljoen A, Marais D, Wenhold FAM, McIntyre AM, Ngidi MS, Annandale JG, Kalaba M, Stewart D. Considerations for the design of nutrition-sensitive production programmes in rural South Africa. BMC Public Health 2020; 20:1383. [PMID: 32912223 PMCID: PMC7488396 DOI: 10.1186/s12889-020-09445-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 08/25/2020] [Indexed: 12/02/2022] Open
Abstract
Background Very little has been researched about the efficacy, effectiveness, feasibility, sustainability and impact of food-based approaches on the diets and nutritional status of populations at risk of hunger and food insecurity. This study contributes knowledge about the impact of food-based approaches on the diets of populations at risk of hunger and food insecurity in four of the poorest rural communities in South Africa. The study investigated the consumption and production patterns of rural households (278 in summer and 280 in winter) in four sites in the poorest municipalities in South Africa. Methods A multistage stratified random sampling technique was applied to identify the communities and sample households for the quantitative survey and qualitative assessments. Qualitative and quantitative data were collected between 2013 and 2015 through focus group discussions (FGDs), key informant interviews and the two-round panel survey to cover both the summer and winter seasons at each site. Results Home gardening led to a significant positive increase in the consumption of white roots and tubers, dark green leafy vegetables, orange-coloured fruit and other fruit in the 24 h prior to the survey. Participation in a community garden led to significant increases in the consumption of dark green leafy vegetables and other vegetables. School gardening did not demonstrate any statistical relationships with the consumption of foods from the crop-related food groups. Crop production improved dietary diversity. Selling produce and irrigation showed a stronger improvement in dietary diversity. Seasonality affected the availability of fresh fruit and vegetables for home consumption in winter. Conclusions Producing beyond that solely for home consumption has greater benefits for dietary diversity and a consumption-smoothing effect during the post-harvest period. Politicians and the scientific community should recognise the role that household and small-scale crop production plays in supporting household consumption and the provision of essential micronutrients despite constraints and disincentives. Production and education programmes should focus on strengthening existing good consumption patterns and promoting the consumption of foods that can improve dietary diversity.
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Affiliation(s)
- S L Hendriks
- Department of Agricultural Economics, Extension and Rural Development, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa.
| | - A Viljoen
- Department of Consumer Science, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - D Marais
- Department of Plant and Soil Sciences, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - F A M Wenhold
- Department of Human Nutrition, University of Pretoria, X323, Arcadia, Pretoria, 0007, South Africa
| | - A M McIntyre
- Department of Agricultural Economics, Extension and Rural Development, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - M S Ngidi
- Department of Agricultural Extension and Rural Resource Management, School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-Natal, Pietermaritzburg, PBag01, Scottsville, 3209, South Africa
| | - J G Annandale
- Department of Plant and Soil Sciences, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - M Kalaba
- Department of Agricultural Economics, Extension and Rural Development, University of Pretoria, PBag X01, Hatfield, Pretoria, 0028, South Africa
| | - D Stewart
- Lima Rural Development Foundation, 2 Forrester's Lane, Pietermaritzburg, 3201, South Africa
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Links S, van Zyl K, Cassiem A, Flett B, Viljoen A, Rose L. The association of maize characteristics with resistance to Fusarium verticillioides and fumonisin accumulation in commercial maize cultivars. WORLD MYCOTOXIN J 2020. [DOI: 10.3920/wmj2019.2537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Fusarium verticillioides is the primary fungus that causes Fusarium ear rot (FER) of maize. Infection results in reduced grain yield and quality due to moulding and the contamination of grain with toxic compounds namely fumonisins. Resistance to fungal infection and fumonisin accumulation in maize and maize grain is governed at different levels. In this study, the structural, physico-chemical and genetic basis of resistance to F. verticillioides was investigated in two, replicated field trials at Potchefstroom and Vaalharts in South Africa. Phenotypic data (silk length, husk coverage, pericarp thickness hundred-kernel mass and kernel hardness), physico-chemical data (kernel pH, moisture content, total nitrogen and carbon as well as phenolic acid content) and the expression of pathogenesis-related-5 gene (PR5) and peroxidase gene expression was evaluated in 15 commercial cultivars under artificially inoculated and natural infection conditions. The data were correlated to FER severity, fumonisin accumulation and fungal DNA (referred to as infection indicators). Disease development and fumonisin contamination in Vaalharts was significantly more than in Potchefstroom. There were no significant correlations (r=≥0.60) between phenotypic characteristics and infection indicators. Kernel pH was the most important trait associated with disease development and was negatively correlated (between r=-0.58 and r=-0.75) to all infection indicators. PR5 gene expression had significant positive correlations (r=0.69 and r=0.72) with the fungal and fumonisin levels, respectively. This study presents of the first data demonstrating the use of gene expression in identifying FER/fumonisin-resistant plant material and could aid breeders and growers in selecting resistant material more effectively.
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Affiliation(s)
- S. Links
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
- Grain SA, Research and Policy Centre, 457 Witherite Street, Willow Acres, Pretoria, 7600, South Africa
| | - K. van Zyl
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
| | - A. Cassiem
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
| | - B.C. Flett
- Agricultural Research Council, Grain Crops, Potchefstroom, 2520, South Africa
| | - A. Viljoen
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
| | - L.J. Rose
- Stellenbosch University, Faculty of AgriSciences, Stellenbosch, Matieland 7602, South Africa
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Kimunye JN, Were E, Mussa F, Tazuba A, Jomanga K, Viljoen A, Swennen R, Muthoni FK, Mahuku G. Distribution of Pseudocercospora species causing Sigatoka leaf diseases of banana in Uganda and Tanzania. Plant Pathol 2020; 69:50-59. [PMID: 31894162 PMCID: PMC6919302 DOI: 10.1111/ppa.13105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/25/2019] [Accepted: 09/29/2019] [Indexed: 05/31/2023]
Abstract
Sigatoka leaf diseases are a major constraint to banana production. A survey was conducted in Tanzania and Uganda to assess the distribution of Pseudocercospora species and severity of Sigatoka leaf diseases. Pseudocercospora species were identified using species-specific primers. Sigatoka-like leaf diseases were observed in all farms and on all cultivars, but disease severity varied significantly (P < 0.001) between countries, districts/regions within countries, altitudinal ranges and banana cultivars. In all regions except Kilimanjaro, P. fijiensis, the causal agent of black Sigatoka, was the only pathogen associated with Sigatoka disease. Mycosphaerella musae was associated with Sigatoka-like symptoms in Kilimanjaro region. Black Sigatoka disease was more severe in Uganda, with a mean disease severity index (DSI) of 37.5%, than in Tanzania (DSI = 19.9%). In Uganda, black Sigatoka disease was equally severe in Luwero district (mean DSI = 40.4%) and Mbarara district (mean DSI = 37.9%). In Tanzania, black Sigatoka was most severe in Kagera region (mean DSI = 29.2%) and least in Mbeya region (mean DSI = 11.5%). Pseudocercospora fijiensis, the most devastating sigatoka pathogen, was detected at altitudes of up to 1877 m a.s.l. This range expansion of P. fijiensis, previously confined to altitudes lower than 1350 m a.s.l. in East Africa, is of concern, especially for smallholder banana farmers growing the susceptible East African Highland bananas (EAHB). Among the banana varieties sampled, the EAHB, FHIA hybrids and Mchare were the most susceptible. Here, the loss of resistance in Yangambi KM5, a banana variety previously resistant to P. fijiensis, is reported for the first time.
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Affiliation(s)
- J. N. Kimunye
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - E. Were
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
| | - F. Mussa
- International Institute of Tropical Agriculture (IITA), Dar es Salaam, PO Box 34441, Tanzania
| | - A. Tazuba
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
| | - K. Jomanga
- International Institute of Tropical Agriculture (IITA), c/o Nelson Mandela African Institution of Science and Technology, Nelson Mandela Road, Arusha, Tanzania
| | - A. Viljoen
- International Institute of Tropical Agriculture (IITA), Dar es Salaam, PO Box 34441, Tanzania
| | - R. Swennen
- International Institute of Tropical Agriculture (IITA), c/o Nelson Mandela African Institution of Science and Technology, Nelson Mandela Road, Arusha, Tanzania
- Laboratory of Tropical Crop Improvement, KU Leuven, Willem De Croylaan 42, 3001 Leuven, Belgium
| | | | - G. Mahuku
- International Institute of Tropical Agriculture, PO Box 7878, Kampala, Uganda
- International Institute of Tropical Agriculture (IITA), Dar es Salaam, PO Box 34441, Tanzania
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Kharsany K, Viljoen A, Leonard C, van Vuuren S. The new buzz: Investigating the antimicrobial interactions between bioactive compounds found in South African propolis. J Ethnopharmacol 2019; 238:111867. [PMID: 30978456 DOI: 10.1016/j.jep.2019.111867] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 04/04/2019] [Accepted: 04/04/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Propolis, a resinous substance produced by the Apis mellifera bee, contains a number of flavonoids sourced from plants found in the surrounding region. Whilst bees use this substance to seal off and protect the beehive, humans have used propolis therapeutically for centuries, making use of its antibacterial, antiseptic, antipyretic and wound healing properties, among others. South African propolis is rich in the flavonoids pinocembrin, galangin, and chrysin and very little previous research has been conducted on the antimicrobial effects of these compounds. AIM OF THE STUDY To obtain an understanding of the antimicrobial activity of the compounds pinocembrin, galangin, and chrysin, both independently and in combination. MATERIALS AND METHODS The compounds pinocembrin, galangin and chrysin were investigated for interactive antimicrobial activity by determining the minimum inhibitory concentrations (MIC), minimum bactericidal concentrations (MBC), anti-quorum sensing activity, biofilm studies, and toxicity studies (brine shrimp lethality assay). RESULTS Minimum inhibitory concentration results demonstrated that combinations of compounds showed better inhibitory activity than single compounds. When the flavonoids were tested in combination using the MIC assay, synergy was noted for 22% of the 1:1 ratio combinations and for 66% of the triple 1:1:1 ratio combinations. Similarly, MBC results showed bactericidal activity from selected combinations, while the compounds on their own demonstrated no cidal activity. Quorum sensing studies showed that compound combinations are more effective at inhibiting bacterial communication than the individual compounds. Biofilm assays showed that the highest percentage inhibition was observed for the triple combination against E. coli at 24 h. Finally, brine shrimp lethality studies revealed that combinations of the three compounds had reduced cytotoxicity when compared to the individual compounds. CONCLUSION The results obtained in this study demonstrate that the compounds found in South African propolis work synergistically to achieve an optimal antimicrobial effect, whilst simultaneously minimizing cytotoxicity.
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Affiliation(s)
- K Kharsany
- Department of Pharmacy and Pharmacology, Faculty of Health Science, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa; SAMRC Herbal Drugs Research Unit, Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - C Leonard
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa
| | - S van Vuuren
- Department of Pharmacy and Pharmacology, Faculty of Health Science, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa.
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Wierzbicki A, Viljoen A, Viljoen S, Martin S, Crook M, Reynolds T. Review of referral criteria to lipid clinics and outcomes of treatment in 4 UK centres. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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Gratwick Z, Donnellan C, Page PC, Viljoen A, Williams J, Lyle CH. Caecal intussusceptions and typhlocolitis in horses with severe Gastrodiscus aegyptiacusinfestation. EQUINE VET EDUC 2018. [DOI: 10.1111/eve.12726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Z. Gratwick
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
| | - C. Donnellan
- Blue Cross Veterinary Hospital; Cape Town South Africa
| | - P. C. Page
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
| | - J. Williams
- Department of Paraclinical Studies; University of Pretoria; Onderstepoort South Africa
| | - C. H. Lyle
- Department of Companion Animal Clinical Studies; University of Pretoria; Onderstepoort South Africa
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Leonard C, Chen W, van Vuuren S, Viljoen A. Exploring the phytochemical variation of the “Pepper-bark” tree (Warburgia salutaris) using HPTLC and UPLC-MS. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- C Leonard
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
| | - W Chen
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
| | - S van Vuuren
- Department of Pharmacy and Pharmacology, University of Witwatersrand, Johannesburg, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
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Mncwangi N, Waltenberger B, Baraldo G, Jansen-Dürr P, Viljoen A, Stuppner H. Sclerocarya birrea cortex ethanolic extract – Chemical characterisation and NOX4 inhibition (anti-ageing property). Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- N Mncwangi
- 1. Department of Pharmaceutical Sciences and SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - B Waltenberger
- 2. Institute of Pharmacy/Pharmacognosy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80 – 20, 6020, Innsbruck, Austria
| | - G Baraldo
- 3. Institute for Biomedical Aging Research and CMBI, University of Innsbruck, Rennweg 10, 6020, Innsbruck, Austria
| | - P Jansen-Dürr
- 3. Institute for Biomedical Aging Research and CMBI, University of Innsbruck, Rennweg 10, 6020, Innsbruck, Austria
| | - A Viljoen
- 1. Department of Pharmaceutical Sciences and SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - H Stuppner
- 2. Institute of Pharmacy/Pharmacognosy and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80 – 20, 6020, Innsbruck, Austria
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Komane B, Viljoen A, Vermaak I, Kamatou G, Summers B. Cosmetic application of Marula seed oil (Sclerocarya birrea): Clinical outcomes. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- B Komane
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - I Vermaak
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - G Kamatou
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
| | - B Summers
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa, Pretoria, South Africa
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Sandasi M, Chen W, Viljoen A. Identification and quantification of herbal tea blend raw materials using hyperspectral imaging spectroscopy. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M Sandasi
- Department of Pharmaceutical Sciences Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - W Chen
- Department of Pharmaceutical Sciences Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Private Bag X680, Pretoria, South Africa
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Vermaak I, Tankeu S, Djokam M, Sandasi M, Chen W, Viljoen A. Hyperspectral imaging in combination with chemometric data analysis – a novel approach in the quality control of herbal material. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- I Vermaak
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Pretoria, South Africa
| | - S Tankeu
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - M Djokam
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - M Sandasi
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - W Chen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Pretoria, South Africa
- SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Pretoria, South Africa
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Aboobaker Z, van Vuuren S, Viljoen A, Crous P. South African endophytes- potential antimicrobial agents. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Z Aboobaker
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, 2193, Parktown, South Africa
| | - S van Vuuren
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, 2193, Parktown, South Africa
| | - A Viljoen
- Department of Pharmaceutical Sciences, Faculty of Sciences, Tshwane University of Technology, Private Bag X680, 0001, Pretoria, South Africa
| | - P Crous
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, 3508 AD, Utrecht, Netherlands
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Abstract
Familial hypercholesterolaemia (FH) is a relatively common autosomal dominant genetic condition leading to premature ischaemic vascular disease and mortality if left untreated. Currently, a universal consensus on the diagnostic criteria of FH does not exist but the diagnosis of FH largely relies on the evaluation of low density lipoprotein-cholesterol (LDL-C) levels, a careful documentation of family history, and the identification of clinical features. Diagnosis based purely on lipid levels remains common but there are several limitations to this method of diagnosis both practically and in the proportion of false-negatives and false-positives detected, resulting in substantial under-diagnosis of FH. In some countries, diagnostic algorithms are supplemented with genetic testing of the index case as well as genetic and lipid testing of relatives of the index case. Such "cascade" screening of families following identification of index cases appears to not only improve the rate of diagnosis but is also cost-effective. Currently, we observe a great variation in the excess mortality among patients with FH, which likely reflects a combination of additional genetic and environmental effects on risk overlaid on the risk associated with FH. Current accepted drug therapies for FH include statins and PSCK9 inhibitors. Further work is required to evaluate the cardiovascular disease risk in patients with genetically diagnosed FH and to determine whether a risk-based approach to the treatment of FH is appropriate.
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Affiliation(s)
- D P Hughes
- Department Metabolic Medicine/Chemical Pathology, Lister Hospital, Stevenage, SG1 4AB, UK
| | - A Viljoen
- Department Metabolic Medicine/Chemical Pathology, Lister Hospital, Stevenage, SG1 4AB, UK.
| | - A S Wierzbicki
- Department Metabolic Medicine/Chemical Pathology, Guy's & St Thomas' Hospitals, St Thomas' Hospital, Lambeth Palace Road, London, SE1 7EH, UK
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Crous P, Wingfield M, Burgess T, Hardy G, Crane C, Barrett S, Cano-Lira J, Le Roux J, Thangavel R, Guarro J, Stchigel A, Martín M, Alfredo D, Barber P, Barreto R, Baseia I, Cano-Canals J, Cheewangkoon R, Ferreira R, Gené J, Lechat C, Moreno G, Roets F, Shivas R, Sousa J, Tan Y, Wiederhold N, Abell S, Accioly T, Albizu J, Alves J, Antoniolli Z, Aplin N, Araújo J, Arzanlou M, Bezerra J, Bouchara JP, Carlavilla J, Castillo A, Castroagudín V, Ceresini P, Claridge G, Coelho G, Coimbra V, Costa L, da Cunha K, da Silva S, Daniel R, de Beer Z, Dueñas M, Edwards J, Enwistle P, Fiuza P, Fournier J, García D, Gibertoni T, Giraud S, Guevara-Suarez M, Gusmão L, Haituk S, Heykoop M, Hirooka Y, Hofmann T, Houbraken J, Hughes D, Kautmanová I, Koppel O, Koukol O, Larsson E, Latha K, Lee D, Lisboa D, Lisboa W, López-Villalba Á, Maciel J, Manimohan P, Manjón J, Marincowitz S, Marney T, Meijer M, Miller A, Olariaga I, Paiva L, Piepenbring M, Poveda-Molero J, Raj K, Raja H, Rougeron A, Salcedo I, Samadi R, Santos T, Scarlett K, Seifert K, Shuttleworth L, Silva G, Silva M, Siqueira J, Souza-Motta C, Stephenson S, Sutton D, Tamakeaw N, Telleria M, Valenzuela-Lopez N, Viljoen A, Visagie C, Vizzini A, Wartchow F, Wingfield B, Yurchenko E, Zamora J, Groenewald J. Fungal Planet description sheets: 469-557. Persoonia 2016; 37:218-403. [PMID: 28232766 PMCID: PMC5315290 DOI: 10.3767/003158516x694499] [Citation(s) in RCA: 151] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 11/12/2016] [Indexed: 01/18/2023]
Abstract
Novel species of fungi described in this study include those from various countries as follows: Australia: Apiognomonia lasiopetali on Lasiopetalum sp., Blastacervulus eucalyptorum on Eucalyptus adesmophloia, Bullanockia australis (incl. Bullanockia gen. nov.) on Kingia australis, Caliciopsis eucalypti on Eucalyptus marginata, Celerioriella petrophiles on Petrophile teretifolia, Coleophoma xanthosiae on Xanthosia rotundifolia, Coniothyrium hakeae on Hakea sp., Diatrypella banksiae on Banksia formosa, Disculoides corymbiae on Corymbia calophylla, Elsinoë eelemani on Melaleuca alternifolia, Elsinoë eucalyptigena on Eucalyptus kingsmillii, Elsinoë preissianae on Eucalyptus preissiana, Eucasphaeria rustici on Eucalyptus creta, Hyweljonesia queenslandica (incl. Hyweljonesia gen. nov.) on the cocoon of an unidentified microlepidoptera, Mycodiella eucalypti (incl. Mycodiella gen. nov.) on Eucalyptus diversicolor, Myrtapenidiella sporadicae on Eucalyptus sporadica, Neocrinula xanthorrhoeae (incl. Neocrinula gen. nov.) on Xanthorrhoea sp., Ophiocordyceps nooreniae on dead ant, Phaeosphaeriopsis agavacearum on Agave sp., Phlogicylindrium mokarei on Eucalyptus sp., Phyllosticta acaciigena on Acacia suaveolens, Pleurophoma acaciae on Acacia glaucoptera, Pyrenochaeta hakeae on Hakea sp., Readeriella lehmannii on Eucalyptus lehmannii, Saccharata banksiae on Banksia grandis, Saccharata daviesiae on Daviesia pachyphylla, Saccharata eucalyptorum on Eucalyptus bigalerita, Saccharata hakeae on Hakea baxteri, Saccharata hakeicola on Hakea victoria, Saccharata lambertiae on Lambertia ericifolia, Saccharata petrophiles on Petrophile sp., Saccharata petrophilicola on Petrophile fastigiata, Sphaerellopsis hakeae on Hakea sp., and Teichospora kingiae on Kingia australis.Brazil: Adautomilanezia caesalpiniae (incl. Adautomilanezia gen. nov.) on Caesalpina echinata, Arthrophiala arthrospora (incl. Arthrophiala gen. nov.) on Sagittaria montevidensis, Diaporthe caatingaensis (endophyte from Tacinga inamoena), Geastrum ishikawae on sandy soil, Geastrum pusillipilosum on soil, Gymnopus pygmaeus on dead leaves and sticks, Inonotus hymenonitens on decayed angiosperm trunk, Pyricularia urashimae on Urochloa brizantha, and Synnemellisia aurantia on Passiflora edulis. Chile: Tubulicrinis australis on Lophosoria quadripinnata.France: Cercophora squamulosa from submerged wood, and Scedosporium cereisporum from fluids of a wastewater treatment plant. Hawaii: Beltraniella acaciae, Dactylaria acaciae, Rhexodenticula acaciae, Rubikia evansii and Torula acaciae (all on Acacia koa).India: Lepidoderma echinosporum on dead semi-woody stems, and Rhodocybe rubrobrunnea from soil. Iran: Talaromyces kabodanensis from hypersaline soil. La Réunion: Neocordana musarum from leaves of Musa sp. Malaysia: Anungitea eucalyptigena on Eucalyptus grandis × pellita, Camptomeriphila leucaenae (incl. Camptomeriphila gen. nov.) on Leucaena leucocephala, Castanediella communis on Eucalyptus pellita, Eucalyptostroma eucalypti (incl. Eucalyptostroma gen. nov.) on Eucalyptus pellita, Melanconiella syzygii on Syzygium sp., Mycophilomyces periconiae (incl. Mycophilomyces gen. nov.) as hyperparasite on Periconia on leaves of Albizia falcataria, Synnemadiella eucalypti (incl. Synnemadiella gen. nov.) on Eucalyptus pellita, and Teichospora nephelii on Nephelium lappaceum.Mexico: Aspergillus bicephalus from soil. New Zealand: Aplosporella sophorae on Sophora microphylla, Libertasomyces platani on Platanus sp., Neothyronectria sophorae (incl. Neothyronectria gen. nov.) on Sophora microphylla, Parastagonospora phoenicicola on Phoenix canariensis, Phaeoacremonium pseudopanacis on Pseudopanax crassifolius, Phlyctema phoenicis on Phoenix canariensis, and Pseudoascochyta novae-zelandiae on Cordyline australis.Panama: Chalara panamensis from needle litter of Pinus cf. caribaea. South Africa: Exophiala eucalypti on leaves of Eucalyptus sp., Fantasmomyces hyalinus (incl. Fantasmomyces gen. nov.) on Acacia exuvialis, Paracladophialophora carceris (incl. Paracladophialophora gen. nov.) on Aloe sp., and Umthunziomyces hagahagensis (incl. Umthunziomyces gen. nov.) on Mimusops caffra.Spain: Clavaria griseobrunnea on bare ground in Pteridium aquilinum field, Cyathus ibericus on small fallen branches of Pinus halepensis, Gyroporus pseudolacteus in humus of Pinus pinaster, and Pseudoascochyta pratensis (incl. Pseudoascochyta gen. nov.) from soil. Thailand: Neoascochyta adenii on Adenium obesum, and Ochroconis capsici on Capsicum annuum. UK: Fusicolla melogrammae from dead stromata of Melogramma campylosporum on bark of Carpinus betulus. Uruguay: Myrmecridium pulvericola from house dust. USA: Neoscolecobasidium agapanthi (incl. Neoscolecobasidium gen. nov.) on Agapanthus sp., Polyscytalum purgamentum on leaf litter, Pseudopithomyces diversisporus from human toenail, Saksenaea trapezispora from knee wound of a soldier, and Sirococcus quercus from Quercus sp. Morphological and culture characteristics along with DNA barcodes are provided.
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Affiliation(s)
- P.W. Crous
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - M.J. Wingfield
- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - T.I. Burgess
- Centre for Phytophthora Science and Management, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - G.E.St.J. Hardy
- Centre for Phytophthora Science and Management, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
| | - C. Crane
- Department of Parks and Wildlife, Vegetation Health Service, Locked Bag 104, Bentley Delivery Centre, Bentley, WA 6983, Australia
| | - S. Barrett
- Department of Parks and Wildlife Albany District, 120 Albany Highway, Albany, WA 6330, Australia
| | - J.F. Cano-Lira
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - J.J. Le Roux
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Matieland 7602, South Africa
| | - R. Thangavel
- Plant Health & Environment Laboratory, Ministry for Primary Industries, Manatū Ahu Matua, 231 Morrin Road, St Johns, Auckland 1072, P.O. Box 2095, Auckland 1140, New Zealand
| | - J. Guarro
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - A.M. Stchigel
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - M.P. Martín
- Departamento de Micología, Real Jardín Botánico-CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - D.S. Alfredo
- Pós-graduação em Sistemática e Evolução, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - P.A. Barber
- ArborCarbon, 1 City Farm Place, East Perth, Western Australia, 6004 Australia
| | - R.W. Barreto
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - I.G. Baseia
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - J. Cano-Canals
- I.E.S Gabriel Ferrater i Soler, Ctra. de Montblanc, 5-9, 43206 Reus, Tarragona, Spain
| | - R. Cheewangkoon
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - R.J. Ferreira
- Pós-graduação em Biologia de Fungos, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - J. Gené
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - C. Lechat
- Ascofrance, 64 route de Chizé, 79360 Villiers en Bois, France
| | - G. Moreno
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - F. Roets
- Department of Conservation Ecology and Entomology, Stellenbosch University, South Africa
| | - R.G. Shivas
- Department of Agriculture and Fisheries, GPO Box 267, Brisbane 4001, Queensland, Australia
| | - J.O. Sousa
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Y.P. Tan
- Department of Agriculture and Fisheries, GPO Box 267, Brisbane 4001, Queensland, Australia
| | - N.P. Wiederhold
- Fungus Testing Laboratory, Department of Pathology, University of Texas Health Science Center, 7703 Floyd Curl Dr., San Antonio, Texas 78229-3900, USA
| | - S.E. Abell
- Australian Tropical Herbarium, James Cook University, PO Box 6811, Cairns 4870, Queensland, Australia
| | - T. Accioly
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - J.L. Albizu
- Aranzadi Society of Sciences, Mycology section, Zorroagagaina 11, P.C. 200014, Donostia-San Sebastián, Spain
| | - J.L. Alves
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - Z.I. Antoniolli
- Programa de Pós-graduação em Ciência do Solo, CCR, Universidade Federal de Santa Maria, Av. Roraima n°1000, Campus, Bairro Camobi, CEP 97105-900, Santa Maria, RS, Brasil
| | - N. Aplin
- 21 Shetland Close, Pound Hill, Crawley, West Sussex RH10 7YZ, England, UK
| | - J. Araújo
- Center of Infectious Disease Dynamics, Millennium Science Complex, University Park Campus, Pennsylvania State University, USA
| | - M. Arzanlou
- Plant Protection Department, Faculty of Agriculture, University of Tabriz, P.O. Box 5166614766, Tabriz, Iran
| | - J.D.P. Bezerra
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - J.-P. Bouchara
- GEIHP - EA 3142, Université d’Angers, Institut de Biologie en Santé PBH-IRIS CHU, 4 Rue Larrey, 49933 Angers Cedex 9, France
| | - J.R. Carlavilla
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - A. Castillo
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - V.L. Castroagudín
- UNESP-University of São Paulo State, Av. Brasil no. 56, 15385-000, Ilha Solteira, São Paulo, Brazil
| | - P.C. Ceresini
- UNESP-University of São Paulo State, Av. Brasil no. 56, 15385-000, Ilha Solteira, São Paulo, Brazil
| | | | - G. Coelho
- Departamento de Fundamentos da Educação, CCR, Universidade Federal de Santa Maria, Av. Roraima n°1000, Campus, Bairro Camobi, CEP 97105-900, Santa Maria, RS, Brasil
| | - V.R.M. Coimbra
- Departamento de Micologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Av. Prof. Nelson Chaves, s/n, 50670-901 Recife, Pernambuco, Brazil
| | - L.A. Costa
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - K.C. da Cunha
- Dermatology Laboratory (SML), University Hospital of Geneva, Rue Gabrielle Perret-Gentil 4, 1205 Genève, Geneva, Switzerland
| | - S.S. da Silva
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - R. Daniel
- Elizabeth Macarthur Agricultural Institute, Department of Primary Industries, Private Bag 4008, Narellan 2567, Australia
| | - Z.W. de Beer
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - M. Dueñas
- Departamento de Micología, Real Jardín Botánico-CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - J. Edwards
- AgriBio Centre for AgriBiosciences, Department of Economic Development, Jobs, Transport and Resources, 5 Ring Road, LaTrobe University, Bundoora, Victoria 3083 Australia
| | - P. Enwistle
- North East Agricultural Services, McLeans Ridges 2480, NSW, Australia
| | - P.O. Fiuza
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | | | - D. García
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - T.B. Gibertoni
- Departamento de Micologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Av. Prof. Nelson Chaves, s/n, 50670-901 Recife, Pernambuco, Brazil
| | - S. Giraud
- GEIHP - EA 3142, Université d’Angers, Institut de Biologie en Santé PBH-IRIS CHU, 4 Rue Larrey, 49933 Angers Cedex 9, France
| | - M. Guevara-Suarez
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - L.F.P. Gusmão
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - S. Haituk
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - M. Heykoop
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - Y. Hirooka
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Clinical Plant Science, Faculty of Bioscience, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo, Japan
| | - T.A. Hofmann
- Herbarium UCH, Mycological Research Center (CIMi), Autonomous University of Chiriquí (UNACHI), 0427, David, Chiriquí Province, Panama
| | - J. Houbraken
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
| | - D.P. Hughes
- Center of Infectious Disease Dynamics, Millennium Science Complex, University Park Campus, Pennsylvania State University, USA
| | - I. Kautmanová
- Slovak National Museum-Natural History Museum, P.O. Box 13, 810 06 Bratislava, Slovakia
| | - O. Koppel
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - O. Koukol
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-12801, Praha 2, Czech Republic
| | - E. Larsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, 405 30 Göteborg, Sweden
| | - K.P.D. Latha
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - D.H. Lee
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0002, South Africa
| | - D.O. Lisboa
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - W.S. Lisboa
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - Á. López-Villalba
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - J.L.N. Maciel
- Brazilian Agriculture Research Corporation-Wheat (EMBRAPA-Trigo), Caixa Postal 3081, Rodovia BR-285 Km 294, 99050-970 Passo Fundo, Rio Grande do Sul, Brazil
| | - P. Manimohan
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - J.L. Manjón
- Departamento de Ciencias de la Vida (Unidad Docente de Botánica), Universidad de Alcalá, E-28805 Alcalá de Henares, Madrid, Spain
| | - S. Marincowitz
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0028, South Africa
| | - T.S. Marney
- Department of Agriculture and Fisheries, GPO Box 267, Brisbane 4001, Queensland, Australia
| | - M. Meijer
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
| | - A.N. Miller
- University of Illinois Urbana-Champaign, Illinois Natural History Survey, 1816 South Oak Street, Champaign, Illinois, 61820, USA
| | - I. Olariaga
- University of the Basque Country (UPV/EHU), Apdo. 644, E-48080 Bilbao, Spain
| | - L.M. Paiva
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - M. Piepenbring
- Department of Mycology, Cluster for Integrative Fungal Research (IPF), Institute for Ecology, Evolution and Diversity, Goethe University, Max-von-Laue-Str. 13, DE-60438 Frankfurt am Main, Germany
| | | | - K.N.A. Raj
- Department of Botany, University of Calicut, Kerala, 673 635, India
| | - H.A. Raja
- University of North Carolina, Department of Chemistry and Biochemistry, Greensboro, North Carolina, 27402, USA
| | - A. Rougeron
- GEIHP - EA 3142, Université d’Angers, Institut de Biologie en Santé PBH-IRIS CHU, 4 Rue Larrey, 49933 Angers Cedex 9, France
| | - I. Salcedo
- University of the Basque Country (UPV/EHU), Apdo. 644, E-48080 Bilbao, Spain
| | - R. Samadi
- Plant Protection Department, Faculty of Agriculture, University of Tabriz, P.O. Box 5166614766, Tabriz, Iran
| | - T.A.B. Santos
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n, Novo Horizonte, 44036-900, Feira de Santana, BA, Brazil
| | - K. Scarlett
- Faculty of Agriculture and Environment, The University of Sydney, Sydney 2006, Australia
| | - K.A. Seifert
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - L.A. Shuttleworth
- Elizabeth Macarthur Agricultural Institute, Department of Primary Industries, Private Bag 4008, Narellan 2567, Australia
| | - G.A. Silva
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - M. Silva
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, 36570-900, MG, Brazil
| | - J.P.Z. Siqueira
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - C.M. Souza-Motta
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Recife, Brazil
| | - S.L. Stephenson
- Department of Biological Sciences, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - D.A. Sutton
- Fungus Testing Laboratory, Department of Pathology, University of Texas Health Science Center, 7703 Floyd Curl Dr., San Antonio, Texas 78229-3900, USA
| | - N. Tamakeaw
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - M.T. Telleria
- Departamento de Micología, Real Jardín Botánico-CSIC, Plaza de Murillo 2, 28014 Madrid, Spain
| | - N. Valenzuela-Lopez
- Mycology Unit, Medical School and IISPV, Universitat Rovira i Virgili (URV), Sant Llorenç 21, 43201 Reus, Tarragona, Spain
| | - A. Viljoen
- Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Stellenbosch 7602, South Africa
| | - C.M. Visagie
- Biodiversity (Mycology), Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada; Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - A. Vizzini
- Department of Life Sciences and Systems Biology, University of Torino, Viale P.A. Mattioli 25, I-10125 Torino, Italy
| | - F. Wartchow
- Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, 58051-900 João Pessoa, Paraíba, Brazil
| | - B.D. Wingfield
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, P. Bag X20, Pretoria 0002, South Africa
| | - E. Yurchenko
- Department of Biotechnology, Paleski State University, Dnyaprouskai flatylii str. 23, BY-225710, Pinsk, Belarus
| | - J.C. Zamora
- Departamento de Biología Vegetal II, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain
| | - J.Z. Groenewald
- CBS-KNAW Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands
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17
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Rose LJ, Mouton M, Beukes I, Flett BC, van der Vyver C, Viljoen A. Multi-environment Evaluation of Maize Inbred Lines for Resistance to Fusarium Ear Rot and Fumonisins. Plant Dis 2016; 100:2134-2144. [PMID: 30683004 DOI: 10.1094/pdis-11-15-1360-re] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fusarium verticillioides causes Fusarium ear rot (FER) of maize and produces fumonisins, which affects grain quality. Host-plant resistance can reduce both FER and fumonisins in maize. In this study, 18 maize inbred lines were evaluated for resistance to F. verticillioides and fumonisin accumulation at five localities in South Africa. Additive main effects and multiplicative interaction analyses revealed significant environment × genotype interactions, with inbred lines CML 390, US 2540W, RO 424W, and VO 617y-2 consistently exhibiting low FER severity (≤5.4%), fungal target DNA (≤0.1 ng μl-1), and fumonisin levels (≤5.6 ppm). Genotype main effect and genotype × environment biplots showed that inbred lines CML 390, US 2540W, and RO 424W were most resistant to FER, fungal colonization, and fumonisin accumulation, respectively, while inbred line RO 424W was most stable in its resistance response over environments. These inbred lines also demonstrated broad adaptability by consistently exhibiting resistance to FER, fungal colonization, and fumonisins across localities. The identified lines could serve as valuable sources of resistance against F. verticillioides and its fumonisins in local breeding programs.
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Affiliation(s)
- L J Rose
- Department of Plant Pathology, Stellenbosch University, Matieland 7602, South Africa
| | - M Mouton
- Department of Plant Pathology, Stellenbosch University, Matieland 7602, South Africa
| | - I Beukes
- Department of Plant Pathology, Stellenbosch University, Matieland 7602, South Africa
| | - B C Flett
- Grain Crops Institute, Agricultural Research Council, Potchefstroom 2520, South Africa
| | | | - A Viljoen
- Department of Plant Pathology, Stellenbosch University
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Gratwick Z, Viljoen A, Page PC, Goddard A, Fosgate GT, Lyle CH. A comparison of the effects of a 4% modified fluid gelatin and a 6% hydroxyethyl starch on haemodilution, colloid osmotic pressure, haemostasis and renal parameters in healthy ponies. Equine Vet J 2016; 49:363-368. [DOI: 10.1111/evj.12594] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 05/18/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Z. Gratwick
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - P. C. Page
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - A. Goddard
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - G. T. Fosgate
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
| | - C. H. Lyle
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
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Viljoen A, Cyrus D. A preliminary investigation of the effects of an Inter Basin Transfer on the ichthyofauna of a small river in northern KwaZulu-Natal,South Africa. African Zoology 2015. [DOI: 10.1080/15627020.2003.11657206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Gratwick Z, Viljoen A, Page P, Goddard A, Fosgate G, Lyle C. A Comparison of A 4% Modified Fluid Gelatin and A 6% Hydroxyethyl Starch on Haemodilution, Colloid Osmotic Pressure, Haemostasis and Renal Parameters in Healthy Ponies. Equine Vet J 2015. [DOI: 10.1111/evj.12486_42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Z. Gratwick
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - P.C. Page
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - A. Goddard
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - G.T. Fosgate
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - C.H. Lyle
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; South Africa
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Abstract
The beauty of science is that well-conducted experiments provide answers to questions which were posed in times of greater ignorance. Cardiovascular disease (CVD) is the leading cause of death worldwide and will be for some time. Cholesterol is a critical player which drives the underlying pathophysiological process of atherosclerosis. Statins are the first line treatment for lipids in CVD given their ability to low-density lipoprotein cholesterol (LDL-C) by up to 50%, and their proven benefits in both primary and secondary intervention . Despite the unprecedented efficacy of statins, additional treatments are sought to potentially reduce the residual risk that remains despite statin treatment such as that associated with reduced high-density lipoprotein cholesterol levels (HDL-C) or triglycerides . In the last 5 years, several trials have reported on their potential additional benefit beyond statin therapy. These include omega-3 fatty acids in patients with prediabetes or diabetes , fibrates in diabetes , nicotinic acid/niacin in cardiovascular disease and cholesterol ester transfer protein inhibitors in cardiovascular disease . Despite their promise, none of these treatments were able to demonstrate benefit beyond baseline statin therapy when compared with placebo . The idea that benefit beyond statin treatment may be an unachievable goal has dogged the medical community working on CVD prevention. The phrase, 'Statins for atherosclerosis - as good as it gets?' was coined in 2005 and has rung true up until now .
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Affiliation(s)
- A Viljoen
- Department of Metabolic Medicine/Chemical Pathology, Lister Hospital, Stevenage, Hertfordshire, UK
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Sanz MG, Viljoen A, Saulez MN, Olorunju S, Andrews FM. Efficacy of a pectin-lecithin complex for treatment and prevention of gastric ulcers in horses. Vet Rec 2014; 175:147. [DOI: 10.1136/vr.102359] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- M. G. Sanz
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
- Department of Veterinary Science; Maxwell H. Gluck Equine Research Center; University of Kentucky; Lexington KY 40546 USA
| | - A. Viljoen
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
| | - M. N. Saulez
- Department of Companion Animal Clinical Studies; Faculty of Veterinary Science; University of Pretoria; Onderstepoort 0110 South Africa
- Drakenstein Veterinary Clinic; Western Cape 7599 South Africa
| | - S. Olorunju
- The Biostatistics Unit; Medical Research Council of South Africa; Pretoria 0001 South Africa
| | - F. M. Andrews
- The Department of Veterinary Clinical Sciences; School of Veterinary Medicine; Louisiana State University; Louisiana 70803 USA
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Viljoen A, Page PC, Fosgate GT, Saulez MN. Coagulation, oncotic and haemodilutional effects of a third-generation hydroxyethyl starch (130/0.4) solution in horses. Equine Vet J 2014; 46:739-44. [PMID: 24372968 DOI: 10.1111/evj.12223] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 12/13/2013] [Indexed: 11/27/2022]
Abstract
REASONS FOR PERFORMING STUDY Clinical indications for hydroxyethyl starches (HES) in horses include rapid plasma volume expansion and oncotic support during periods of hypoproteinaemia. Side effects such as coagulopathies associated with HES administration pose limitations to their use in veterinary medicine. In man, tetrastarch (130/0.4) has demonstrated less profound effects on coagulation compared with first- and second-generation HES. OBJECTIVES To evaluate the haemostatic and oncotic effects of tetrastarch (130/0.4) administered at 10, 20 and 40 ml/kg bwt in healthy horses. STUDY DESIGN Randomised crossover experiment. METHODS Tetrastarch (130/0.4) was administered to 6 healthy pony mares at 10, 20 and 40 ml/kg bwt with a 2-week washout period. Packed cell volume, plasma total solids, colloid osmotic pressure (COP), platelet count and thromboelastography (TEG) were measured at baseline, immediately after infusion (0 h), and 1, 6, 12, 24, 48 and 96 h after tetrastarch infusion. RESULTS All TEG variables remained within normal reference ranges in all 3 treatment groups. Administration of tetrastarch at 40 ml/kg bwt resulted in a prolonged K-time (P = 0.049) at 6 h post infusion, and decreased maximum amplitude at 0 (P<0.001), 1 (P = 0.022), 6 (P = 0.006), 24 (P<0.001) and 48 h (P = 0.013) post infusion compared with baseline. Administration of tetrastarch increased mean COP values above baseline in all 3 treatment groups, persisting to 24, 6 and 48 h for the 10, 20 and 40 ml/kg bwt doses, respectively. CONCLUSIONS Although still within established reference ranges, compared with lower dosages, the administration of 40 ml/kg bwt tetrastarch (130/0.4) is more likely to induce changes in coagulation as measured by TEG. Tetrastarch increased COP at all dosages evaluated in healthy horses. Tetrastarch (130/0.4) at 10 and 20 ml/kg bwt has potential as a synthetic colloid for resuscitation and provision of oncotic support in horses.
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Affiliation(s)
- A Viljoen
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
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Krentz AJ, Viljoen A, Sinclair A. Insulin resistance: a risk marker for disease and disability in the older person. Diabet Med 2013; 30:535-48. [PMID: 23173973 DOI: 10.1111/dme.12063] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 11/06/2012] [Indexed: 12/24/2022]
Abstract
Clinical metabolic studies have demonstrated that insulin action declines progressively with age in humans. In addition to its close association with Type 2 diabetes, which reduces life expectancy in older people, age-related insulin resistance is implicated in pathogenesis of several highly prevalent disorders for which ageing is a major risk factor. These include atherosclerotic cardiovascular disease, dementia, frailty and cancer. Accordingly, insulin resistance may be viewed as biomarker of age-related ill health and reduced lifespan. The rapidly rising number of older people, coupled with a high prevalence of insulin resistance resulting from obesity and sedentary lifestyles, presents unprecedented public health and societal challenges. Studies of centenarians have shown that preserved whole-body sensitivity to insulin is associated with longevity. The mechanisms through which insulin action is associated with age-related diseases remain unclear. Changes in body composition, i.e. sarcopenia and excess adiposity, may be more potent than age per se. Moreover, the impact of insulin resistance has been difficult to disentangle from the clustering of vascular risk factors that co-segregate with the insulin resistance-hyperinsulinaemia complex. Potentially modifiable mediators of age-related changes in insulin sensitivity include alterations in adipocytokines, impaired skeletal myocyte mitochondrial function and brown fat activity. The hypothesis that improving or maintaining insulin sensitivity preserves health and extends lifespan merits further evaluation. Practical non-pharmacological interventions directed against age-related insulin resistance remain underdeveloped. Novel metabolically active pharmacological agents with theoretical implications for some age-related disorders are entering clinical trials. However, recent adverse experiences with the thiazolidinediones suggest the need for a cautious approach to the use of insulin sensitizing drugs in older people. This could be particularly important in the absence of diabetes where the risk to benefit analysis may be less favourable.
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Affiliation(s)
- A J Krentz
- Institute of Diabetes for Older People, Bedfordshire & Hertfordshire Postgraduate Medical School, University of Bedfordshire, Luton, UK.
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Abstract
Hyperandrogenism in women is a common clinical scenario and is characterised by menstrual disturbance, hirsutism and infertility. Accurate measurement of serum testosterone is often used in these patients to diagnose polycystic ovary syndrome (PCOS) and to prompt further investigation in patients with suspected androgen-secreting tumours. Immunoassay methods are commonly used for serum testosterone quantitation, although the 'gold standard' reference method is mass spectrometry (MS), which is only available at certain tertiary centres. In this retrospective observational study, 57 female patients were investigated for possible hyperandrogenism. Biochemical testing for testosterone using an immunoassay was compared to an MS method. Correlation between the immunoassay and MS method was worse at lower testosterone concentrations, however overall, gave a reasonably strong correlation coefficient of 0.73. This study highlights the ongoing controversy over the most reliable test for hyperandrogenism in clinical practice. It is vital that clinicians are aware of the limitations of these methods and the clinical repercussions.
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Affiliation(s)
- A Bell
- Department of Surgery, Lister Hospital, Stevenage, UK
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Small IM, Flett BC, Marasas WFO, McLeod A, Stander MA, Viljoen A. Resistance in Maize Inbred Lines to Fusarium verticillioides and Fumonisin Accumulation in South Africa. Plant Dis 2012; 96:881-888. [PMID: 30727350 DOI: 10.1094/pdis-08-11-0695] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fusarium ear rot of maize, caused by Fusarium verticillioides, is an important disease affecting maize production worldwide. Apart from reducing yield and grain quality, F. verticillioides produces fumonisins which have been associated with mycotoxicoses of animals and humans. Currently, no maize breeding lines are known with resistance to F. verticillioides in South Africa. The objective of this study, therefore, was to evaluate 24 genetically diverse maize inbred lines as potential sources of resistance to Fusarium ear rot and fumonisin accumulation in field trials at Potchefstroom and Vaalharts in South Africa. After artificial silk channel inoculation with F. verticillioides, Fusarium ear rot development was determined at harvest and fumonisins B1, B2, and B3 quantified. A significant inbred line by location effect was observed for Fusarium ear rot severity (P ≤ 0.001), although certain lines proved to be consistently resistant across both locations. The individual inbred lines also differed considerably in fumonisin accumulation between Potchefstroom and Vaalharts, with differentiation between susceptible and potentially resistant inbred lines only being possible at Vaalharts. A greenhouse inoculation trial was then also performed on a subset of potentially resistant and highly susceptible lines. The inbred lines CML 390, CML 444, CML 182, VO 617Y-2, and RO 549 W consistently showed a low Fusarium ear rot (<5%) incidence at both Potchefstroom and Vaalharts and in the greenhouse. Two of these inbred lines, CML 390 and CML 444, accumulated fumonisin levels <5 mg kg-1. These lines could potentially act as sources of resistance for use within a maize breeding program.
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Affiliation(s)
- I M Small
- Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa
| | - B C Flett
- Grain Crops Institute, Agricultural Research Council, Private Bag X1251, Potchefstroom 2520, South Africa
| | | | | | | | - A Viljoen
- Department of Plant Pathology, University of Stellenbosch, South Africa
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Saulez MN, Viljoen A, Kafka U, Rubio-Martinez L, van Wilpe E, Steyl J. The use of nuclear imaging for a mixed C cell microfollicular carcinoma of the thyroid gland in a mature horse. EQUINE VET EDUC 2012. [DOI: 10.1111/j.2042-3292.2012.00405.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Abstract
Lipid lowering is established as a proven intervention to reduce atherosclerosis and its complications. Statins form the basis of care but are not able to treat all aspects of dyslipidaemia. Many novel therapeutic compounds are being developed. These include additional therapeutics for low-density lipoprotein cholesterol, for example, thyroid mimetics (thyroid receptor beta-agonists), antisense oligonucleotides or microsomal transfer protein inhibitors (MTPI); triglycerides, for example, novel peroxosimal proliferator activating receptors agonists, MTPIs, diacylglycerol acyl transferase-1 inhibitors and high-density lipoprotein cholesterol (HDL-C), for example, mimetic peptides; HDL delipidation strategies and cholesterol ester transfer protein inhibitors and modulators of inflammation, for example, phospholipase inhibitors. Gene therapy for specific rare disorders, for example, lipoprotein lipase deficiency using alipogene tiparvovec is also in clinical trials. Lipid-lowering drugs are likely to prove a fast-developing area for novel treatments as possible synergies exist between new and established compounds for the treatment of atherosclerosis.
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Affiliation(s)
- A S Wierzbicki
- Metabolic Medicine/Chemical Pathology, St. Thomas' Hospital Campus, London, UK.
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Abstract
Inflammation is a manifestation of a wide range of disorders which include; arthritis, atherosclerosis, Alzheimer's disease, inflammatory bowel syndrome, physical injury and infection amongst many others. Common treatment modalities are usually nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin, paracetamol, indomethacin and ibuprofen as well as corticosteroids such as prednisone. These however, may be associated with a host of side effects due to non-selectivity for cyclooxygenase (COX) enzymes involved in inflammation and those with selectivity may be highly priced. Thus, there is a continuing search for safe and effective antiinflammatory molecules from natural sources. Research has confirmed that iridoids exhibit promising anti-inflammatory activity which may be beneficial in the treatment of inflammation. Iridoids are secondary metabolites present in various plants, especially in species belonging to the Apocynaceae, Lamiaceae, Loganiaceae, Rubiaceae, Scrophulariaceae and Verbenaceae families. Many of these ethnobotanicals have an illustrious history of traditional use alluding to their use to treat inflammation. Although iridoids exhibit a wide range of pharmacological activities such as cardiovascular, hepatoprotection, hypoglycaemic, antimutagenic, antispasmodic, anti-tumour, antiviral, immunomodulation and purgative effects this review will acutely focus on their anti-inflammatory properties. The paper aims to present a summary for the most prominent iridoid-containing plants for which anti-inflammatory activity has been demonstrated in vitro and / or in vivo.
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Affiliation(s)
- A Viljoen
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa.
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Belgrove A, Steinberg C, Viljoen A. Evaluation of Nonpathogenic Fusarium oxysporum and Pseudomonas fluorescens for Panama Disease Control. Plant Dis 2011; 95:951-959. [PMID: 30732104 DOI: 10.1094/pdis-06-10-0409] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nonpathogenic Fusarium oxysporum endophytes from healthy banana roots were evaluated for their ability to reduce Fusarium wilt of banana (Panama disease). Isolates were identified morphologically and by using species-specific primers. Pathogenicity was confirmed by inoculating banana plantlets in the greenhouse. Nonpathogenic F. oxysporum isolates were grouped into 14 haplotype groups by polymerase chain reaction restriction fragment length polymorphism analysis of the intergenic spacer region, and representative isolates evaluated for biocontrol of F. oxysporum f. sp. cubense. In the greenhouse, 10 nonpathogenic F. oxysporum isolates were able to significantly reduce Fusarium wilt of banana. The isolate that protected banana plantlets best in the greenhouse, a nonpathogenic F. oxysporum from the root rhizosphere, and Pseudomonas fluorescens WCS 417 were then field tested. When the putative biological control organisms were tested in the field, neither the nonpathogenic F. oxysporum, P. fluorescens, nor combinations thereof reduced Fusarium wilt development significantly. A number of factors could contribute to the lack of field protection, including soil microbial and chemical composition and reduced survival of biocontrol organisms in banana roots. A lack of knowledge regarding the etiology of Fusarium wilt of 'Cavendish' banana in the subtropics and the effect of F. oxysporum f. sp. cubense race and banana cultivar in protection of banana by biocontrol organisms should be further investigated.
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Affiliation(s)
- A Belgrove
- Agricultural Research Council-Grain Crops Institute, Potchefstroom 2520, South Africa, and Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa
| | - C Steinberg
- INRA-Université de Bourgogne, Microbiology of Soil and Environment, Dijon, France
| | - A Viljoen
- Department of Plant Pathology, University of Stellenbosch, Matieland 7602, South Africa
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Abstract
Clinical use of diagnostic ultrasound at point-of-care or emergency situations, although common, has not been well documented in veterinary medicine. Medical records of after-hour emergency equine admissions during a 10-year period were reviewed and horses that received ultrasound scans were identified. Data sheets for each ultrasound scan performed during emergency clinical evaluation were collected and reviewed. Data extracted included anatomical region imaged, body system affected, documented ultrasonographic diagnosis and final diagnosis. Six hundred and nine records were available of which 108 horses had an ultrasound diagnostic procedure performed. The most common reason for emergency ultrasonography was to investigate gastrointestinal abnormalities, the largest proportion of these being large intestinal disorders. A complete ultrasound report was documented in 57% of evaluations, of which 79% correlated with a final diagnosis. Incomplete reporting made accurate interpretation of records difficult. Results indicate that the use of ultrasound in the emergency setting may be of diagnostic benefit and impact on patient management. Ultrasound training should be provided to residents in order to gain proficiency, especially with regard to the gastrointestinal system.
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Affiliation(s)
- A Viljoen
- Section of Equine Medicine, Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Private Bag X05, Onderstepoort 0110, South Africa.
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Abstract
AIMS Cardiovascular disease (CVD) is the most common cause of death worldwide. Pharmaceutical risk reduction with high-intensity statin therapy is advisable for high-risk patients. Clinicians face a conflict between prescribing for cost (simvastatin 80 mg) or for efficacy (atorvastatin 80 mg). The aim of this audit was to examine the use, efficacy and tolerability of high intensity statin treatment (simvastatin 80 mg; atorvastatin 80 mg) in primary care. METHODOLOGY Electronic medical records were examined from two general practitioners' surgeries. Analyses involved Mann-Whitney U and χ(2) tests. RESULTS A total of 116 patients had taken simvastatin 80 mg or atorvastatin 80 mg. Patients were similar between treatment groups: mostly men (62.9%), over 60 years old (68.1%), non-smokers (81.0%) taking statins for secondary prevention (56.9%). More patients on simvastatin withdrew from treatment as a result of inefficacy (49.3% vs. 23.2%, p=0.025) compared with the atorvastatin group. Furthermore, patients on simvastatin were more likely to be failing conventional targets of lipid control, compared with patients on atorvastatin 80 mg (43.5% vs. 21.3%, p=0.006). Tolerability was similar between the two groups. DISCUSSION UK guidelines recommend simvastatin 80 mg as an economic choice, despite scant evidence at this dose and recent safety concerns. Conversely, robust evidence exists for atorvastatin 80 mg. Head-to-head clinical trials or clinical studies comparing these agents are lacking. The present study suggests that atorvastatin 80 mg compares favourably to simvastatin in terms of efficacy and has a similar tolerability profile. CONCLUSION This retrospective observational study suggests that despite national guidelines, atorvastatin 80 mg is used in clinical practice and is more effective and at least as well tolerated as simvastatin 80 mg.
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Affiliation(s)
- C L Meek
- Department of Chemical Pathology, Lister Hospital, Stevenage, UK.
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Fourie G, Steenkamp ET, Ploetz RC, Gordon TR, Viljoen A. Current status of the taxonomic position of Fusarium oxysporum formae specialis cubense within the Fusarium oxysporum complex. Infect Genet Evol 2011; 11:533-42. [PMID: 21256980 DOI: 10.1016/j.meegid.2011.01.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 01/12/2011] [Accepted: 01/14/2011] [Indexed: 12/24/2022]
Abstract
Fusarium oxysporum is an asexual fungal species that includes human and animal pathogens and a diverse range of nonpathogens. Pathogenic and nonpathogenic strains of this species can be distinguished from each other with pathogenicity tests, but not with morphological analysis or sexual compatibility studies. Substantial genetic diversity among isolates has led to the realization that F. oxysporum represents a complex of cryptic species. F. oxysporum f. sp cubense (Foc), causal agent of Fusarium wilt of banana, is one of the more than 150 plant pathogenic forms of F. oxysporum. Multi-gene phylogenetic studies of Foc revealed at least eight phylogenetic lineages, a finding that was supported by random amplified polymorphic DNAs, restriction fragment length polymorphisms and amplified fragment length polymorphisms. Most of these lineages consist of isolates in closely related vegetative compatibility groups, some of which possess opposite mating type alleles, MAT-1 and MAT-2; thus, the evolutionary history of this fungus may have included recent sexual reproduction. The ability to cause disease on all or some of the current race differential cultivars has evolved convergently in the taxon, as members of some races appear in different phylogenetic lineages. Therefore, various factors including co-evolution the plant host and horizontal gene transfer are thought to have shaped the evolutionary history of Foc. This review discusses the evolution of Foc as a model formae specialis in F. oxysporum in relation to recent research findings involving DNA-based studies.
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Affiliation(s)
- G Fourie
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa.
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Abstract
Cardiovascular disease (CVD) increases in a curvilinear fashion after 65 years in men and 75 years in women and the majority of all cardiovascular events occur in individuals older then 65 years. There are notable differences in the clinical assessment of hyperlipidaemia, cardiovascular risk estimation as well as the safety and tolerability profiles in the elderly compared to younger individuals. Clinical trial data have now demonstrated the benefits of statin treatment in the elderly in both the primary and secondary prevention settings. There is however limited data for individuals older than 80 years. Little data is available on other lipid modifying medication in the elderly. With continuing increases in average life expectancy, preventive efforts will become increasingly important for preventing morbidity, improving quality of life, and reducing healthcare expenditures for older persons. This emphasizes the importance of clinical decision-making and weighing up the risks and benefits of treatment.
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Affiliation(s)
- A Viljoen
- Department of Chemical Pathology, Lister Hospital, Stevenage, Hertfordshire SG1 4AB, UK.
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Viljoen A. The promise of expanding the role of BNP testing. Int J Clin Pract 2010; 64:136-8. [PMID: 20089003 DOI: 10.1111/j.1742-1241.2009.02203.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Viljoen A, Saulez M, Donnellan C, Bester L, Gummow B. After-hours equine emergency admissions at a university referral hospital (1998 - 2007) : causes and interventions. J S Afr Vet Assoc 2009; 80:169-73. [DOI: 10.4102/jsava.v80i3.196] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Medical records of equine after-hours admissions from 1998 to 2007 are reviewed. Data extracted from the medical records included signalment, reason for admission, pre-admission treatment, clinical presentation, procedures performed, final diagnoses, complications occurring in hospital, length of stay and outcome. Eight hundred and twenty after-hours admissions were available of which 75 % were classified as emergencies. Most horses originated from Gauteng province (82 %), with Thoroughbred, Arabian, and Warmbloods representing 46 %, 10 % and 7 % of horses. Horses had a median age of 7 years and were predominantly male (60 %). Gastrointestinal (64 %) and musculoskeletal (19 %) disorders were the primary reasons for admission. Anti-inflammatories, sedation and antibiotics were given in 51 %, 20 % and 15 % of cases respectively prior to referral. On admission, 23 % of horses had surgical intervention. Intravenous catheterisation (64 %), rectal examination (61 %), nasogastric intubation (56 %), abdominocentesis (33 %) and ultrasonography (19 %) were the procedures performed most frequently. Surgical and medical colics constituted 28 % and 27 % respectively of the overall diagnoses, while piroplasmosis was diagnosed in 5 % of horses. Post-admission complications occurred in 2 % of horses. The median length of stay was 4 days (95 % CI: 1 to 21 days). Overall survival to discharge was 74 %. This study demonstrates that the majority of after-hours equine admissions to a university referral hospital required medical intervention and were mostly due to gastrointestinal disorders. Information obtained from this study can be used in emergency referral planning.
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Waller S, Thyagarajan S, Kaplan F, Viljoen A. Dramatic resolution of massive retinal hard exudates after correction of extreme dyslipidaemia. Eye (Lond) 2009; 23:738. [DOI: 10.1038/eye.2008.109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Abstract
BACKGROUND The diagnosis of copper deficiency and excess states is challenging. It was hoped that the non-caeruloplasmin-bound ("free") copper would reduce this difficulty; however, it has its own problems. The copper/caeruloplasmin ratio has been advocated as an alternative index of copper status, especially as it would not need gender-derived or age-derived reference intervals. However, there are no comparative data for different populations using different assays. METHOD Independent paired copper and caeruloplasmin data were retrospectively obtained for three laboratories. From these data, the copper/caeruloplasmin ratio was calculated, and descriptive statistics for the populations and methods were obtained. The relationship between the copper/caeruloplasmin ratio and both copper and caeruloplasmin were also investigated for the three laboratories. RESULTS All three datasets displayed a non-Gaussian distribution. The Burton median was statistically different from the two other medians, which did not differ significantly from each other. The regression lines for both copper and caeruloplasmin with the ratio differed from each other. CONCLUSION The copper/caeruloplasmin ratio behaves differently depending on the laboratory, the population studied, or both. Thus, cut-offs in the literature are not transferable. Each laboratory should therefore derive its own cut-offs.
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Affiliation(s)
- P J Twomey
- Department of Clinical Biochemistry, The Ipswich Hospital, Ipswich, UK.
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Abstract
AIMS To establish the value of the first 3 years of a cardiovascular risk factor clinic in tackling the major risk factors for cardiovascular disease (CVD). METHODS A database review of all 339 patients referred to the clinic. RESULTS Blood pressure levels in the hypertensive patients were significantly reduced and 9% of the smokers managed to quit for 12 months, half of them subsequently relapsing. Ninety-eight oral glucose tolerance tests were performed and 40% were abnormal yielding 10 patients with hitherto unsuspected diabetes and 29 with impaired glucose tolerance. Sixty-four of the 97 referrals of patients in the primary prevention group (no evidence of CVD) were found to have calculated Framingham coronary heart disease risk estimates of < 15% per decade, the lowest being 0.3%. Lipid levels were significantly reduced in both the hypercholesterolaemic (n = 290) and hypertriglyceridaemic (n = 49) patient groups through the use of more potent statins, extensive use of combination therapy and appropriate use of fibrates and omega-3 fish oil supplements. The annual drug cost per patient treated only increased from 310.72 pounds sterling to 398.08 pounds sterling, yet there was a 3.5-fold increase in the number of patients achieving the General Medical Services 2 target of a total cholesterol < 5 mmol/l and a 4.5-fold increase in patients achieving the Joint British Societies 2 target of a low-density lipoprotein (LDL) cholesterol < 2 mmol/l. CONCLUSION The need for a specialist clinic was demonstrated by the 66% of primary prevention referrals who did not meet the current NICE treatment threshold. Additionally, the clinic was able to diagnose and treat 39 patients with undiagnosed diabetes mellitus/impaired glucose tolerance and 12 with hypothyroidism. LDL cholesterol was reduced overall by 36% implying a greater than one-third reduction in future cardiovascular events before the improvements in blood pressure control and smoking cessation are included and this was achieved at marginal extra cost to the mean drug bill at referral.
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Affiliation(s)
- S C Martin
- Department of Clinical Biochemistry and Immunology, Peterborough and Stamford Hospitals Foundation NHS Trust, Peterborough, Cambridgeshire, UK.
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Abstract
INTRODUCTION The biochemical assessment of copper status is not easy when investigating deficient and excess states. Most clinicians request copper and ceruloplasmin and assume that the results provided by their local laboratory are comparable with data in the literature. AIMS AND METHODS We decided to obtain paired copper and ceruloplasmin values retrospectively from the laboratory information systems from three different hospital laboratories to see how the relationships compared. Descriptive statistics and the relationship between caeruloplasmin and copper were obtained. RESULTS Our data shows differences in the relationship (slope, intercept and correlation co-efficient) between copper and ceruloplasmin; this is especially the case at the clinical cut-off of a ceruloplasmin concentration of 200 mg/l. CONCLUSION Differing methods or populations may be contributing to the differences between the data sets. We therefore recommend that local cut-offs are derived for the investigation of copper deficiency and excess states.
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Affiliation(s)
- P J Twomey
- Department of Clinical Biochemistry, The Ipswich Hospital, Ipswich, UK.
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Abstract
In December 2006, symptoms typical of iris yellow spot caused by Iris yellow spot virus (IYSV; genus Tospovirus, family Bunyaviridae) were observed on scapes (seed stalks) in an onion (Allium cepa L.) seed crop in the Klein Karoo of the Western Cape Province, South Africa. Symptoms included diamond-shaped chlorotic or necrotic lesions on the scapes, some of which had 'green-islands' with nested diamond-shaped lesions, as well as indistinct, circular to irregular, chlorotic or necrotic lesions of various sizes. At the time symptoms were observed, approximately 5% of the scapes had lodged as a result of extensive lesions resembling those caused by IYSV. The crop was 2 to 3 weeks from harvest. Symptomatic tissue from two plants (two samples from one plant and four samples from the other plant) was tested for IYSV by reverse-transcriptase (RT)-PCR. Total RNA was extracted from symptomatic scape tissue with the SV Total RNA Isolation System (Promega, Madison, WI) according to the manufacturer's instructions. First strand cDNA was synthesized with the RevertAid H Minus First Strand cDNA Synthesis kit (Fermentas Inc., Hanover, MD), followed by PCR amplification with primers IYSV-For (TGG YGG AGA TGY RGA TGT GGT) and IYSV-Rev (ATT YTT GGG TTT AGA AGA CTC ACC), which amplify the nucleocapsid (NP) gene of IYSV. An amplicon of expected size (approximately 750 bp) was observed for each of the symptomatic plants assayed and was sequenced. Comparison of the sequence (GenBank Accession No. EF579801) with GenBank sequences revealed 95% sequence identity with the NP gene of IYSV GenBank Accession No. EF419888, with eight amino acid differences. The known geographic distribution of IYSV in onion bulb or seed crops has increased rapidly in recent years in many areas of the world (1). To our knowledge, this is the first confirmation of IYSV in South Africa. Approximately 6,100 ha of onion bulb crops are grown annually in South Africa in the Western Cape, Kwazulu Natal, Limpopo, and Northern Cape provinces, and 600 ha of onion seed crops are grown primarily in the semi-arid regions of the Western Cape. Examination of an additional 10 onion seed crops in the Klein Karoo during January 2007 revealed the presence of iris yellow spot in three more crops at approximately 5% incidence in each crop. The four symptomatic crops had all been planted as bulb-to-seed crops, using vernalized bulbs produced on the same farm. This suggests that IYSV may have been disseminated into the seed crops on the vernalized bulbs, either as infected bulb tissue or in viruliferous thrips on the bulbs. Reference: (1) D. H. Gent et al. Plant Dis. 90:1468, 2006.
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Affiliation(s)
- L J du Toit
- Washington State University Mount Vernon NWREC, Mount Vernon 98273
| | - J T Burger
- Department of Genetics, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - A McLeod
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - M Engelbrecht
- Department of Genetics, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - A Viljoen
- Department of Plant Pathology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
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Twomey PJ, Viljoen A. Independent specimens are important. J Clin Pathol 2007; 60:848. [PMID: 17596556 PMCID: PMC1995800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
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Twomey PJ, Viljoen A, House IM, Reynolds TM, Wierzbicki AS. Limitations of non-ceruloplasmin-bound copper in routine clinical practice. Gut 2007; 56:154. [PMID: 17172594 PMCID: PMC1856664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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Abstract
BACKGROUND An investigation on copper metabolism usually includes the measurement of serum levels of copper and caeruloplasmin. Using these levels, some laboratories derive levels of non-caeruloplasmin-bound copper (NCC); however, a considerable number of patients may show negative values, which is not physiologically possible. AIM To derive an equation for adjusted copper in a manner similar to that widely accepted for adjusted calcium. METHODS A linear regression equation for the relationship between caeruloplasmin and copper was used: [copper] (micromol/l) = 0.052x[caeruloplasmin] (mg/l). An equation for copper adjusted for caeruloplasmin was derived using this equation and the reference interval of 10-25 micromol/l for copper. RESULTS The derived equation was [adjusted copper] (micromol/l) = [total copper] (micromol/l)+0.052x[caeruloplasmin] (mg/l)+17.5 (micromol/l). The adjusted copper concentrations on the 2.5th and 97.5th centiles were 12.7 and 21.5 micromol/l, respectively, with the population having a gaussian distribution. The relationship between NCC and the adjusted copper concentrations is linear and independent of caeruloplasmin concentration. CONCLUSION Calculation of copper adjusted for caeruloplasmin uses the same variables as those for NCC. Accordingly, the problems that are caused by the lack of specificity of caeruloplasmin immunoassays are the same as those identified for NCC. This calculation, however, overcomes the negative values that are found in a considerable minority of patients with NCC, as well as age and sex differences in the caeruloplasmin reference interval. As the concept is already familiar to non-laboratory healthcare professionals in the form of calcium adjusted for albumin, this method is potentially less confusing than that for NCC.
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Affiliation(s)
- P J Twomey
- Department of Clinical Biochemistry, Ipswich Hospital, Ipswich, UK.
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Viljoen A, Walker KS, Ho C, Twomey PJ. Analysis of cerebrospinal fluid for suspected subarachnoid haemorrhage is improved by built-in spectrophotometer software. Clin Mol Pathol 2006; 59:667. [PMID: 16731614 PMCID: PMC1860386 DOI: 10.1136/jcp.2005.028191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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