نتایج جستجو برای: southern africa
تعداد نتایج: 224713 فیلتر نتایج به سال:
Understanding the evolutionary relationships of Trypanosoma (Duttonella) vivax genotypes between West Africa and Southern Africa can provide information on the epidemiology and control of trypanosomosis. Cattle blood samples from Zambia and Ghana were screened for T. vivax infection using specie-specific PCR and sequencing analysis. Substantial polymorphism was obtained from phylogenetic analys...
Telecommunications development in Southern Africa is encouraged by government-level support and market trends. Various markets in the Southern African Development Community (SADC) region offer telecommunications operators’ solid growth potential and the advantages of geographic diversification. This paper presents a logical methodology for telecommunications operators (mobile or fixed) to guide...
Note: Proceedings of the 2nd One Health Conference in Africa. Jointly organised by the Southern African Centre for Infectious Disease Surveillance and the Tanzania National Institute for Medical Research, held at the Snow Crest Hotel in Arusha, Tanzania from 16th to 19th April 2013: http://www. sacids.org/kms/frontend/ index.php?m=119. In April 2013, the Southern African Centre for Infectious D...
P-wave and S-wave delay times from the broadband data of the southern Africa seismic experiment have been inverted to obtain three-dimensional images of velocity perturbations in the mantle beneath southern Africa. High velocity mantle roots appear to extend to depths of at least 250 km, and locally to depths of 300 km beneath the Kaapvaal and Zimbabwe cratons. Thick roots are confined to the A...
Although eliminating the pathogenic asexual stages of Plasmodium falciparum is pivotal for the successful treatment of individual symptomatic patients, at a population level reducing the carriage of viable gametocytes is crucial for limiting the transmission of malaria parasites. Gametocytes are the non-pathogenic sexual stages of the P. falciparum parasite responsible for transmission of the i...
Four new myxozoans (Myxosporea: Bivalvulida) from intertidal fishes along the south coast of Africa.
Current records of marine myxozoans from the coast of Africa are limited to the descriptions of 52 species from mostly Senegal, with a few from Tunisia and southern Africa. Between 1998 and 2000 several intertidal fishes from the southern Cape coast of South Africa were examined for the presence of myxozoan infections. Three new species, Ceratomyxa dehoopi sp. n., C. cottoidii sp. n. and C. hon...
2 3 Southern Africa was characterized by a heavily regulated agricultural market before the late 1980s but, since then, countries in the region have followed a strategy to remove restrictive measures from the agriculture sector. The deregulation process has occurred in the context of worldwide liberalization of agriculture. These changes mean that all the countries in the southern African regio...
BACKGROUND We investigated 18-month incidence and determinants of death and loss to follow-up of children after antiretroviral therapy (ART) initiation in a multiregional collaboration in lower-income countries. METHODS HIV-infected children (positive polymerase chain reaction <18 months or positive serology ≥18 months) from International Epidemiologic Databases to Evaluate AIDS cohorts, <16 ...
The various genetic systems (mitochondrial DNA, the Y chromosome and the genome-wide autosomes) indicate that Africa is the most genetically diverse continent in the world and the most likely place of origin for anatomically modern humans. However, where in Africa modern human arose and how the current genetic makeup within the continent was shaped is still open to debate. Here, we summarise th...
In recent years, southern Africa has experienced a substantial and persistent outbreak of measles, with the greatest impact seen in children. As southern Africa is also the region of the globe with the highest prevalence of human immunodeficiency virus (HIV), a large proportion of measles infections in the recent outbreak has been seen in HIV-infected children, including in Botswana, one of the...
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