Additional and Corroborative Data on Violet Gem Scapolite Probably from Eastern Africa

1980 ◽  
Vol 17 (4) ◽  
pp. 235-238 ◽  
Author(s):  
Brian Jackson
Keyword(s):  
Eastern Africa

LIGHT STABLE ISOTOPES OF OSTRICH EGGSHELLS PROVIDE SITE-SPECIFIC PALEOENVIRONMENTAL RECORDS DURING THE MIDDLE-TO-LATER STONE AGE TRANSITION IN EASTERN AFRICA

2018 ◽  
Author(s):  
Elizabeth Niespolo ◽  
◽  
Warren D. Sharp ◽  
Warren D. Sharp ◽  
Christian A. Tryon ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Eastern Africa ◽  
Stone Age ◽  
Later Stone Age ◽  
Site Specific

On the taxonomy of Afrotropical Coleophoridae (III). New or little known species from Central and Oriental Africa (Lepidoptera, Coleophoridae)

Zootaxa ◽  
2020 ◽  
Vol 4763 (2) ◽  
pp. 151-174
Author(s):  
GIORGIO BALDIZZONE ◽  
HUGO W. VAN DER WOLF
Keyword(s):  
New Species ◽  
Male Genitalia ◽  
Eastern Africa ◽  
First Time

This work presents a review of the Coleophoridae of Central and Eastern Africa. A lectotype is designated for Coleophora psychropa Meyrick, 1920, and the male genitalia of C. crossanthes Meyrick, 1938, are illustrated for the first time. Coleophora sabaea Baldizzone, 2007, previously known only from Yemen, is added to the African fauna. Nine new species of Coleophora Hübner, 1822 are described: C. schouteni sp. nov., C. giustii, sp. nov., C. centrafricana sp. nov., C. riftella sp. nov., C. camerunensis sp. nov., C. ensifera sp. nov., C. gilgilensis sp. nov., C. nyanzaensis sp. nov., C. silvestris sp. nov. 

The Middle to Later Stone Age transition at Panga ya Saidi, in the tropical coastal forest of eastern Africa

2021 ◽  
Vol 153 ◽  
pp. 102954
Author(s):  
Ceri Shipton ◽  
James Blinkhorn ◽  
Will Archer ◽  
Nikolaos Kourampas ◽  
Patrick Roberts ◽  
...  
Keyword(s):  
Eastern Africa ◽  
Stone Age ◽  
Coastal Forest ◽  
Later Stone Age

scholarly journals Real-World Outcomes of Direct-Acting Antiviral Treatment and Retreatment in United Kingdom–Based Patients Infected With Hepatitis C Virus Genotypes/Subtypes Endemic in Africa

2021 ◽  
Author(s):  
Elihu Aranday-Cortes ◽  
C Patrick McClure ◽  
Christopher Davis ◽  
William L Irving ◽  
Kazeem Adeboyejo ◽  
...  
Keyword(s):  
United Kingdom ◽  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Treatment Failure ◽  
Antiviral Treatment ◽  
Natural Resistance ◽  
Eastern Africa ◽  
Middle Income ◽  
Hcv Genotypes ◽  
Direct Acting

Abstract Background Chronic hepatitis C virus (HCV) infection affects 71 million individuals, mostly residing in low- and middle-income countries (LMICs). Direct-acting antivirals (DAAs) give high rates of sustained virological response (SVR) in high-income countries where a restricted range of HCV genotypes/subtypes circulate. Methods We studied United Kingdom–resident patients born in Africa to examine DAA effectiveness in LMICs where there is far greater breadth of HCV genotypes/subtypes. Viral genome sequences were determined from 233 patients. Results Full-length viral genomic sequences for 26 known subtypes and 5 previously unidentified isolates covering 5 HCV genotypes were determined. From 149 patients who received DAA treatment/retreatment, the overall SVR was 93%. Treatment failure was associated primarily with 2 subtypes, gt1l and gt4r, using sofosbuvir/ledipasvir. These subtypes contain natural resistance-associated variants that likely contribute to poor efficacy with this drug combination. Treatment failure was also significantly associated with hepatocellular carcinoma. Conclusions DAA combinations give high SVR rates despite the high HCV diversity across the African continent except for subtypes gt1l and gt4r, which respond poorly to sofosbuvir/ledipasvir. These subtypes are widely distributed across Western, Central, and Eastern Africa. Thus, in circumstances where accurate genotyping is absent, ledipasvir and its generic compounds should not be considered as a recommended treatment option.

scholarly journals Complete genome analysis of African swine fever virus responsible for outbreaks in domestic pigs in 2018 in Burundi and 2019 in Malawi

2021 ◽  
Vol 53 (4) ◽  
Author(s):  
Jean N. Hakizimana ◽  
Jean B. Ntirandekura ◽  
Clara Yona ◽  
Lionel Nyabongo ◽  
Gladson Kamwendo ◽  
...  
Keyword(s):  
Complete Genome ◽  
African Swine Fever Virus ◽  
Gc Content ◽  
Genomic Analysis ◽  
African Swine Fever ◽  
Eastern Africa ◽  
Nucleotide Identity ◽  
Comparative Genomic ◽  
Genome Sequences ◽  
Domestic Pigs

AbstractSeveral African swine fever (ASF) outbreaks in domestic pigs have been reported in Burundi and Malawi and whole-genome sequences of circulating outbreak viruses in these countries are limited. In the present study, complete genome sequences of ASF viruses (ASFV) that caused the 2018 outbreak in Burundi (BUR/18/Rutana) and the 2019 outbreak in Malawi (MAL/19/Karonga) were produced using Illumina next-generation sequencing (NGS) platform and compared with other previously described ASFV complete genomes. The complete nucleotide sequences of BUR/18/Rutana and MAL/19/Karonga were 176,564 and 183,325 base pairs long with GC content of 38.62 and 38.48%, respectively. The MAL/19/Karonga virus had a total of 186 open reading frames (ORFs) while the BUR/18/Rutana strain had 151 ORFs. After comparative genomic analysis, the MAL/19/Karonga virus showed greater than 99% nucleotide identity with other complete nucleotides sequences of p72 genotype II viruses previously described in Tanzania, Europe and Asia including the Georgia 2007/1 isolate. The Burundian ASFV BUR/18/Rutana exhibited 98.95 to 99.34% nucleotide identity with genotype X ASFV previously described in Kenya and in Democratic Republic of the Congo (DRC). The serotyping results classified the BUR/18/Rutana and MAL/19/Karonga ASFV strains in serogroups 7 and 8, respectively. The results of this study provide insight into the genetic structure and antigenic diversity of ASFV strains circulating in Burundi and Malawi. This is important in order to understand the transmission dynamics and genetic evolution of ASFV in eastern Africa, with an ultimate goal of designing an efficient risk management strategy against ASF transboundary spread.

scholarly journals Farmers’ knowledge and perception of finger millet blast disease and its control practices in western Kenya

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Wilton Mbinda ◽  
Agnes Kavoo ◽  
Fredah Maina ◽  
Margaret Odeph ◽  
Cecilia Mweu ◽  
...  
Keyword(s):  
Finger Millet ◽  
Management Practices ◽  
Smallholder Farmers ◽  
Descriptive Analysis ◽  
Wide Distribution ◽  
Blast Disease ◽  
Eastern Africa ◽  
Planting Density ◽  
Global Food Security ◽  
Disease Occurrence

Abstract Background Finger millet blast disease, caused by Pyricularia oryzae, is a serious constrain of finger millet production which is threatening global food security especially to the resource poor smallholder farmers in arid and semi-arid regions. The disease adversely affects finger millet production and consumption due to its wide distribution and destruction in all finger millet growing areas of southern Asia and eastern Africa. Here, we present a study that investigated the occurrence, impact, risk factors and farmers’ knowledge and perceptions of finger millet blast in Kenya. Methods We surveyed blast disease occurrence and interviewed farmers in Bungoma and Kisii Counties of Kenya during March–April 2019. Data were analysed using SPSS statistical program. Descriptive analysis was done by calculating means, percentages, frequencies, and standard errors. Comparative statistics, chi-square and t-tests, were used to evaluate differences existing among the farm characteristics and socio-demographics and the knowledge and perceptions of blast disease and its management practices. Results Our results show that blast disease is prevalent in all surveyed areas and adversely affects the productivity of the crop leading to poor yields. The disease occurrence varied from 92 to 98%, and was significantly higher in the major finger millet growing areas compared to the minor ones. Blast occurrence was associated with rainfall, altitude, planting density, intercropping and other farming practices. In all the surveyed regions, farmers had little knowledge about blast disease identification, its detection and spread. Further, the farmers’ awareness of blast disease control was inconsistent with established practices. Conclusions Our results show mitigation of finger millet blast disease should aim at improving farmers’ adoption of best practices through development of acceptable blast-resistant finger millet varieties, use of sustainable disease management practices, fostering linkages and creating new partnerships in the production-supply chain and maintaining a functional seed system. Findings from this study provide essential insights for effective decision making and management of the disease. This is fundamental to sustainable and secure food and income for finger millet growing farmers in Kenya.

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