نتایج جستجو برای: eastern africa
تعداد نتایج: 192736 فیلتر نتایج به سال:
Based on mitochondrial 16S rRNA sequences, we suggest that the founder individuals of the introduced Greek population of Chamaeleo africanus originated in the Nile Delta region of Egypt. In Ch. chamaeleon, we discovered in the eastern Mediterranean new 16S rRNA haplotypes, being highly distinct from previously published western Mediterranean haplotypes. Eastern Mediterranean haplotypes were fou...
The spatial distribution of crops and farming systems in Africa is determined by the duration of the period during which crop and livestock water requirements are met. The length of growing period (LGP) is normally assessed from weather station data—scarce in large parts of Africa—or coarse-resolution rainfall estimates derived from weather satellites. In this study, we analyzed LGP and its var...
During the latest Miocene and the early Pliocene, tetraconodontine suids were the most predominant large omnivorous mammals in Africa. Yet, new species were often identified on the grounds of limited evidence, a situation impacting their value for biochronological correlations as well as for environmental and biogeographical reconstructions. The description of the most abundant known collection...
BACKGROUND Pretreatment drug resistance in people initiating or re-initiating antiretroviral therapy (ART) containing non-nucleoside reverse transcriptase inhibitors (NNRTIs) might compromise HIV control in low-income and middle-income countries (LMICs). We aimed to assess the scale of this problem and whether it is associated with the intiation or re-initiation of ART in people who have had pr...
To understand geographic variation in travel-related illness acquired in distinct African regions, we used the GeoSentinel Surveillance Network database to analyze records for 16,893 ill travelers returning from Africa over a 14-year period. Travelers to northern Africa most commonly reported gastrointestinal illnesses and dog bites. Febrile illnesses were more common in travelers returning fro...
This paper aims to describe the ways in which the HIV/AIDS epidemic negatively influences food and livelihood security, how it impacts on the food and nutrition security of millions of households, the responses of these households and communities as well as the policy and programme implications. As far as possible, this paper uses examples from West Africa, but in their absence the author was f...
Background: Female infertility varies widely by geographic location around the world. In 2010, there was an estimated 48.5 million infertile couples worldwide, and from 1990 to 2010 there was slight change in levels of infertility in most of the world. In 2010, the countries with the lowest rates of female infertility included the South American countries of Peru, Bolivia, Ecuador and Bolivia, ...
1 Department of Microbial Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa, 2 Malaria Alert Centre, Malawi College of Medicine, Blantyre, Malawi, 3 Instituto Nacional de Saúde, Maputo, Mozambique, 4 Eastern and Southern Africa Centre of International Parasite Control, Kenya Medical Research Institute, Nairobi, Kenya, 5 Department of Epidemiology and B...
A high percentage (up to 90%) of dromedary camels in the Middle East as well as eastern and central Africa have antibodies to Middle East respiratory syndrome coronavirus (MERS-CoV). Here we report comparably high positivity of MERS-CoV antibodies in dromedary camels from northern Mali. This extends the range of MERS-CoV further west in Africa than reported to date and cautions that MERS-CoV sh...
Introduction The changing distribution of tuberculosis across the world presents a dangerous and challenging picture. After many years of declining prevalence tuberculosis is now on the increase in many places, not least some of the London boroughs. But it is in Africa, Eastern Europe (EE) and Central Asia (CA) where the most alarming rises are taking place. Figures 1a. and 1b. overleaf show tu...
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