scholarly journals Experimental plague infection in South African wild rodents

1986 ◽  
Vol 96 (2) ◽  
pp. 171-183 ◽  
Author(s):  
A. J. Shepherd ◽  
P. A. Leman ◽  
D. E. Hummitzsch
Keyword(s):  
South Africa ◽  
South African ◽  
Rodent Species ◽  
Enzyme Linked Immunosorbent Assay ◽  
Wild Rodents ◽  
Infectious Dose ◽  
Rhabdomys Pumilio ◽  
Dramatic Decline ◽  
Northern Cape ◽  
Moderately Resistant

SUMMARYSusceptibility studies were undertaken to determine the response of some South African wild rodent species to experimental plague (Yersinia pestis) infection.A degree of plague resistance was found in three gerbil species captured in the plague enzootic region of the northern Cape Province, these being the Namaqua gerbil, Desmodillus auricularis, (LD50 1 × 106 organisms), the bushveld gerbil, Tatera leucogaster, (LD50 9·1 × 105) and the highveld gerbil, T. brantsii (LD50 4 × 102). Animals from a population of the four-striped mouse, Rhabdomys pumilio, captured in the plague area of Port Elizabeth, proved moderately resistant to experimental plague infection (LD 50 1·3 × 104) while those from another population of the same species captured in a plague-free area of the Orange Free State were extremely susceptible (LD50, 5 organisms). The response of both populations however was a heterogeneous one. Marked differences in susceptibility were also found between two populations of multimammate mice, Mastomys natalensis (2n = 32) although both originated from areas outwith the known distribution of plague in southern Africa.The 50% infectious dose was relatively high in T. leucogaster (3·2 × 102) and D. auricularis (1·7 × 103), but was low (2–16 organisms) in the other rodent species tested.The plague antibody response, determined by enzyme-linked immunosorbent assay (ELISA), was extremely short-lived in T. leucogaster, only 10% of inoculated animals remaining seropositive at low titres after 11 weeks. Antibodies persisted for only slightly longer in the sera of T. brantsii which were reinoculated with 2 × 103 plague organisms 6 weeks after initial challenge.The demonstration of the existence of both susceptible and resistant populations of R. pumilio and M. natalensis indicates that these species must be considered as potential plague reservoir hosts in parts of South Africa.The results suggest that resistance to plague infection in previously epizootic hosts in the northern Cape Province such as Tatera sp. and D. auricularis has arisen through continual selective pressure of the organism. If the findings are applicable to gerbil populations in other plague enzootic regions of South Africa it is probable that acquired plague resistance has been responsible for the absence of gerbil epizootics and consequently for the dramatic decline in human plague outbreaks in South Africa since 1950.

scholarly journals Serological survey of bovine viral diarrhoea virus in Namibian and South African kudu (Tragelaphus strepsiceros) and eland (Taurotragus oryx)

2013 ◽  
Vol 84 (1) ◽  
Author(s):  
Terence P. Scott ◽  
Eleanor Stylianides ◽  
Wanda Markotter ◽  
Louis Nel
Keyword(s):  
South Africa ◽  
South African ◽  
Southern Africa ◽  
Bovine Viral Diarrhoea Virus ◽  
Enzyme Linked Immunosorbent Assay ◽  
Bovine Viral Diarrhoea ◽  
Serum Samples ◽  
Diarrhoea Virus ◽  
Central Regions ◽  
Tragelaphus Strepsiceros

Bovine viral diarrhoea virus (BVDV) is a pestivirus that affects members of the order Artiodactyla, including members of the subfamily Bovinae. Little is known about the seroprevalence of BVDV in southern Africa, especially the prevalence in wild ruminant populations such as kudu (Tragelaphus strepsiceros). A handful of random surveys suggested that seroprevalence ranged between 6% and 70% in southern African wild ruminants. The present study aimed to determine the seroprevalence of BVDV amongst kudu and eland (Taurotragus oryx) from Namibia and South Africa. A BVDV-specific enzyme-linked immunosorbent assay was performed on 50 serum samples from kudu and eland from South Africa and Namibia. The seroprevalence of BVDV in South African kudu was 71%, identical to that in Namibian kudu. The seroprevalence in Namibian eland was 40%. The kudu and cattle farming (free ranging) regions in Namibia predominantly overlap in the central regions, ensuring ample opportunity for cross-species transmission of BVDV. It is therefore important to determine the true prevalence of BVDV in southern Africa in both domesticated and wild animals. In addition, a potential link between BVDV incidence and a devastating rabies epidemic in Namibian kudu was proposed and such a notion could be supported or discredited by comparative prevalence data.

Isaac Schapera 1905–2003

2005 ◽  
Author(s):  
Adam Kuper
Keyword(s):  
South Africa ◽  
South African ◽  
Turn Of The Century ◽  
London School ◽  
Founding Fathers ◽  
Graduate Seminar ◽  
Northern Cape ◽  
London School Of Economics ◽  
University Of Cape Town ◽  
The University

Isaac Schapera (1905–2003), a Fellow of the British Academy, spent the second half of his long life in London but remained very much a South African. His parents immigrated to South Africa at the turn of the century from what is now Belarus, and settled in Garies, a small town in the semi-desert district of Little Namaqualand, in the Northern Cape. As an undergraduate at the University of Cape Town, Schapera was introduced to ‘British social anthropology’ by A. R. Radcliffe-Brown, one of the founding fathers of the discipline, the other being Bronislaw Malinowski. He then became one of the first members of Malinowski’s post-graduate seminar at the London School of Economics. Towards the end of his career, Schapera preferred to describe himself as an ethnographer rather than as an anthropologist. His research in the 1930s and 1940s was distinguished by a concern with ‘social change’, a focus endorsed in South Africa by Malinowski in London.

scholarly journals The militarisation of the Platfontein San (!Xun and Khwe): The initial years 1966–1974

2014 ◽  
Vol 10 (4) ◽  
Author(s):  
A S Van Wyk
Keyword(s):  
South Africa ◽  
South African ◽  
The South ◽  
Security Forces ◽  
Political Events ◽  
Northern Cape ◽  
Liberation Movements ◽  
Made In

The resettlement of 372 San (Bushmen) soldiers with dependents from 31/201 and 203 Battalions in Namibia to Schmidtsdrift in the Northern Cape during March 1990 was the last chapter in the process of militarisation of the !Xun and Khwe communities. However, there is a popular perception that the South African Defence Force (SADF) was primarily responsible for the militarisation of this particular San community, with the founding of 31 Battalion during 1974. This ignores the fact that the !Xun and Khwe originated in Angola, where they were actively involved with the Portuguese security forces. With one exception, only superficial mention is made in the literature about the role of the San soldiers in Angola before independence in November 1975. This article shows that the militarisation of the San actually started in 1966, when members of the !Xun were recruited by the Portuguese Security Police (PIDE) and successfully used against the Angolan liberation movements MPLA, FNLA and UNITA. The lifestyle of the San before the PIDE era is discussed, as is the period in which they were raised to a superior status as flecha fighters. This period of military prowess ended with the independence of Angola and resulted in the !Xun and Khwe seeking refuge with the SADF. These geo-political events led to the founding of 31 Battalion, situated in the Western Caprivi, where former flecha soldiers were retrained and incorporated into SADF structures. In closing, brief mention is made of the resettlement of the !Xun and Khwe to Schmidtsdrift in South Africa.

Efficiency and costs of different concentrated solar power plant configurations for sites in Gauteng and the Northern Cape, South Africa

2013 ◽  
Vol 24 (1) ◽  
pp. 77-89 ◽  
Author(s):  
Thomas Telsnig ◽  
Ludger Eltrop ◽  
Hartmut Winkler ◽  
Ulrich Fahl
Keyword(s):  
South Africa ◽  
South African ◽  
Solar Power ◽  
Electricity Demand ◽  
Plant Performance ◽  
Concentrated Solar Power ◽  
Demand Structure ◽  
The Future ◽  
Northern Cape ◽  
Electricity Mix

Concentrated solar power (CSP) plants can play a major role in the future South African electricity mix. Today the Independent Power Producer (IPP) Procurement Programme aims to facilitate renewable energy projects to access the South African energy market. In spite of this incentive programme, the future role of CSP plants in South Africa has yet to be defined. Using hourly irradiance data, we present a new method to calculate the expected yield of different parabolic trough plant configurations at a site in each of Gauteng and the Northern Cape, South Africa. We also provide cost estimates of the main plant components and an economic assessment that can be used to demonstrate the feasibility of solar thermal power projects at different sites. We show that the technical configurations, as well as the resulting cost of electricity, are heavily dependent on the location of the plant and how the electricity so generated satisfies demand. Today, levelised electricity costs for a CSP plant without storage were found to be between 101 and 1.52 ZAR2010/kWhel, assuming a flexible electricity demand structure. A CSP configuration with Limited Storage produces electricity at costs between 1.39 and 1.90 ZAR2010/kWhel, whereas that with Extended Storage costs between 1.86 and 2.27 ZAR2010/kWhel. We found that until 2040 a decrease in investment costs results in generating costs between 0.73 ZAR2010/kWhel for a CSP plant without storage in Upington and 1.16 ZAR2010/ kWhel for a configuration with Extended Storage in Pretoria. These costs cannot compete, however, with the actual costs of the traditional South African electricity mix. Nevertheless, a more sustainable energy system will require dispatchable power which can be offered by CSP including storage. Our results show that the choice of plant configuration and the electricity demand structure have a significant effect on costs. These results can help policymakers and utilities to benchmark plant performance as a basis for planning.

THE COST OF ENVIRONMENTAL IMPACT ASSESSMENT (EIA) IN SOUTH AFRICA

2009 ◽  
Vol 11 (01) ◽  
pp. 51-68 ◽  
Author(s):  
FRANCOIS RETIEF ◽  
BENNETT CHABALALA
Keyword(s):  
South Africa ◽  
South African ◽  
Small Scale ◽  
South African Context ◽  
The South ◽  
Project Cost ◽  
North West ◽  
Northern Cape ◽  
African Context ◽  
The Cost

The wide adoption of EIA internationally is implicitly or explicitly based on the assumption that the benefits of EIA outweigh the costs. However, there has been surprisingly little empirical research conducted on the "cost" of EIA. The latter has been mostly because of the difficult methodological challenges it presents, which include the difficulties associated with clarifying terminology and disentangling what is meant by "cost". South Africa has been a leading developing country in terms of the introduction of EIA. However, almost a decade of mandatory EIA practice has raised serious questions about unjustified and unnecessary time delays and monetary costs and a desperate need for improved efficiency and effectiveness. In light of the latter the urgent need to gain a better understanding of the "cost" of EIA is evident. This paper presents preliminary results of an empirical study on the "direct EIA cost" in relation to "overall project cost" in South Africa. The data was obtained from a detailed survey of 148 EIAs conducted in the Free State, North West and the Northern Cape Provinces. The research suggests that the average direct cost of EIA within this region of South Africa is particularly low compared to international EIA systems. However, as a percentage of total project cost, EIA in South Africa compares with the higher spectrum of international practice. The latter suggests that within the South African context a large number of EIAs are being conducted for relatively small scale projects and that the main cost burden is placed on small and medium economic enterprise. In conclusion the overall profile of EIA cost in the South African context is described in relation to four broad project categories. To take the debate forward and to allow for regional comparative analysis, it is proposed that the research be expanded to include other provinces.

scholarly journals Transitioning to Sustainable Administrative Gatekeeping in Access to Social Grants for South African Adult Persons with Disabilities

2021 ◽  
Vol 13 (7) ◽  
pp. 3597
Author(s):  
Mangalane du Toit ◽  
Liezel Lues
Keyword(s):  
South Africa ◽  
Medical History ◽  
South African ◽  
Medical Condition ◽  
Management Model ◽  
Persons With Disabilities ◽  
Face To Face ◽  
Telephone Interviews ◽  
Northern Cape ◽  
Social Grants

This article explores the efficiency in the administration of social grants for adult persons with disabilities (PWDs) in the Northern Cape province of South Africa. The focus, in particular, is on explaining why, despite a gatekeeping element, adult PWDs presenting with the same medical condition, with mild or no verifiable impairment, keep returning and are allowed through the system, only to be rejected again, citing the same reasons as before. Administrative gatekeeping, as illustrated in the 2011 Social Grants Disability Management Model, does not extend beyond (i) verifying the correctness of supporting documents and (ii) checking documented proof of medical history to ascertain that applicants of social grants for adult PWDs are not booked for medical assessments within three months of their last assessment. This points to a weakness in the system, as the screening officials cannot turn away applicants of social grants for adult PWDs for any other reason once the documents are verified as correct. Here, we report the findings from responses to structured telephone interviews and structured face-to-face interviews with applicants of social grants for adult PWDs who are residents of the Northern Cape province of South Africa. We conclude that socio-economic circumstances, rather than impairment, are the main drivers for adult PWDs to keep on applying for social grants for adult PWDs and we offer some strategies for addressing this predicament to contribute to a sustainable and an efficient, effective, and economical administration process.

scholarly journals SOUTH AFRICAN WRITINGS OF MORRIS HOFFMAN: BETWEEN YIDDISH AND HEBREW

2017 ◽  
Vol 23 (2) ◽  
pp. 569-582
Author(s):  
Ber Kotlerman
Keyword(s):  
South Africa ◽  
South African ◽  
Eastern European ◽  
Religious Background ◽  
Northern Cape ◽  
Hebrew Version ◽  
European Jewish ◽  
New Perspective ◽  
Selection Of

Morris Hoffman (1885-1940), who was born in a Latvian township and emigrated to South Africa in 1906, was a brilliant example of the Eastern European Jewish maskil writing with equal fluency in both Yiddish and Hebrew. He published poetry and prose in South African Yiddish and Hebrew periodicals. His long Yiddish poem under the title Afrikaner epopeyen (African epics) was considered to be the best Yiddish poetry written in South Africa. In 1939, a selection of his Yiddish stories under the title Unter afrikaner zun (Under the African sun) was prepared for publishing in De Aar, Cape Province (which is now in the Northern Cape Province), and published after his death in 1951 in Johannesburg. The Hebrew version of the stories was published in Israel in 1949 under the title Taḥat shmey afrikah (Under the skies of Africa). The article deals with certain differences between the versions using the example of one of the bilingual stories. The comparison between the versions illuminates Hoffman’s reflections on the relations between Jews and Afrikaners with a rather new perspective which underlines their religious background

Millin, Sarah Gertrude (1888–1968)

2018 ◽  
Author(s):  
Ellen Turner
Keyword(s):  
South Africa ◽  
South African ◽  
Literary History ◽  
Rural South ◽  
White Middle Class ◽  
International Reputation ◽  
Northern Cape ◽  
English Speaking ◽  
Successful Author ◽  
Rural South Africa

Born of Lithuanian Jewish parentage, author Sarah Gertrude Millin grew up amongst the diamond diggings in the Northern Cape province of South Africa. Beginning with The Dark River (1919), Millin published seventeen novels in a career spanning five decades. The publication of God’s Step-Children (1924) cemented her international reputation. The South Africa of Millin’s novels is represented with a stark and pessimistic realism. Her fiction depicts both urban and rural South Africa, and her work embodies many of the opinions of her English-speaking, white, middle-class, South African contemporaries. While Millin was a prolific and popular writer during her lifetime, posthumously her reputation has suffered because of the recurrent themes of racial purity and abhorrence of miscegenation in her writings. J. M. Coetzee’s 1980 article on the author has had a particularly significant role in the establishment of (still scant) scholarly criticism on Millin. Millin’s oeuvre also includes two autobiographies, a six-volume diary, and copious non-fictional works on South African concerns. Of these, her biography of diamond magnate Cecil Rhodes (1933) was particularly acclaimed. As a successful author in her own era, acquainted with many of the modernist writers of the time, Millin is both a significant figure in South African women’s literary history and a representative of racist colonial ideologies.

scholarly journals Prevalence of anti-SARS-CoV-2 antibodies among blood donors in Northern Cape, KwaZulu-Natal, Eastern Cape, and Free State provinces of South Africa in January 2021.

2021 ◽  
Author(s):  
Wendy Sykes ◽  
Laurette Mhlanga ◽  
Ronel Swanevelder ◽  
Tanya Nadia Glatt ◽  
Eduard Grebe ◽  
...  
Keyword(s):  
South Africa ◽  
South African ◽  
Blood Donors ◽  
Population Level ◽  
Free State ◽  
Eastern Cape ◽  
The South ◽  
Short Supply ◽  
Kwazulu Natal ◽  
Northern Cape

Abstract Background: Population-level estimates of prevalence of anti-SARS-CoV-2 antibody positivity (seroprevalence) is a crucial epidemiological indicator for tracking the Covid-19 epidemic. Such data are in short supply, both internationally and in South Africa. The South African blood services (the South African National Blood Service, SANBS and the Western Cape Blood Service, WCBS) are coordinating a nationally representative survey of blood donors, which it is hoped can become a cost-effective surveillance method with validity for community-level seroprevalence estimation.Methods: Leveraging existing arrangements, SANBS human research ethics committee permission was obtained to test blood donations collected on predefined days (7th, 10th ,12th ,15th ,20th ,23th and 25th January) for anti-SARS-CoV-2 antibodies, using the Roche Elecsys Anti-SARS-CoV-2 assay on the cobas e411 platform currently available in the blood services’ donation testing laboratories. Using standard methods, prevalence analysis was done by province, age and race, allowing age to be regarded as either a continuous or categorical variable. Testing was performed in the Eastern Cape (EC), Free State (FS), KwaZulu Natal (ZN) and Northern Cape (NC) provinces.Results: We report on data from 4858 donors - 1457 in EC; 463 in NC; 831 in FS and 2107 in ZN. Prevalence varied substantially across race groups and between provinces, with seroprevalence among Black donors consistently several times higher than among White donors, and the other main population groups (Coloured and Asian) not consistently represented in all provinces. There is no clear evidence that seroprevalence among donors varies by age. Weighted net estimates of prevalence (in the core age range 15-69) by province (compared with official clinically-confirmed COVID-19 case rates in mid-January 2021) are: EC-63%(2.8%), NC-32%(2.2%), FS-46%(2.4%), and ZN-52%(2.4%).Conclusions: Our study demonstrates substantial differences in dissemination of SARS-CoV-2 infection between different race groups, most likely explained by historically based differences in socio-economic status and housing conditions. As has been seen in other areas, even such high seroprevalence does not guarantee population-level immunity against new outbreaks – probably due to viral evolution and waning of antibody neutralization. Despite its limitations, notably a ‘healthy donor’ effect, it seems plausible that these estimates are reasonably generalisable to actual population level anti-SARS-CoV-2 seroprevalence, but should be further verified.

scholarly journals The influence of internationalisation of labour on the performance of small-scale rural-based agricultural firms: A South African perspective

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Patient Rambe
Keyword(s):  
South Africa ◽  
South African ◽  
Economic Benefits ◽  
Small Scale ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
North West ◽  
Foreign Labour ◽  
Managerial Implications ◽  
Northern Cape

Orientation: The main objective of this study is to determine the extent to which small-scale, rural-based agricultural firms in South Africa use foreign labour.Research purpose: South African business owners or managers’ perceived preference for labour from foreign nationals has heightened South African nationals’ concerns that these owners or managers are prejudicing local citizens under the guise of reducing overhead costs.Motivation for the study: There is a scarcity of studies on the influence of free movement of foreign labour on the performance of small-scale, rural-based agricultural firms in South Africa.Research design, approach and method: A cross-sectional survey research was conducted among 151 small-scale agricultural businesses’ (SSABs) owners or managers in Vryburg-Pokwani in North West and Northern Cape provinces of South Africa. Descriptive and inferential statistics were used to analyse the data. Furthermore, post hoc comparisons (Bonferroni) were conducted to establish the long-term performance expectations based on these firms’ utilisation of foreign labour.Main findings: The results showed that the majority (70.9%) of SSABs did not employ foreign labour. Moreover, despite the statistically significant differences in the performance of SSABs based on their usage of foreign labour, SSABs’ orientation towards internationalisation of labour increased with increased deployment of foreign labour.Practical and managerial implications: The study recommended the possibility of deploying highly skilled, value-adding and value-creating foreign labour, while rationalising the recruitment of semi-skilled and unskilled local labour.Contribution or value addition: The results are of significance to SSABs that need to consider the economic benefits of recruiting foreign labour even if that may increase their overhead costs.

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