African lineage

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Public health surveillance in the UK revolutionises our understanding of the invasive Salmonella Typhimurium epidemic in Africa

The ST313 sequence type of Salmonella Typhimurium causes invasive non-typhoidal salmonellosis and was thought to be confined to sub-Saharan Africa. Two distinct phylogenetic lineages of African ST313 have been identified.

13p vioraclene 31-03-2024 7 2 Download

Large-scale mitochondrial DNA analysis of native honey bee Apis mellifera populations reveals a new African subgroup private to the South West Indian Ocean islands

The South West Indian Ocean (SWIO) archipelagos and Madagascar constitute a hotspot of biodiversity with a high rate of endemism. In this area, the endemic subspecies A. m. unicolor has been described in Madagascar. It belongs to the African lineage, one of the four described evolutionary lineages in honey bees.

21p vinarcissa 21-03-2023 4 1 Download

Molecular and symbiotic efficiency characterization of rhizobia nodulating bambara groundnut (Vigna subterranea L.) from agricultural soils of daloa localities in Côte D’ivoire

Bambara groundnut (Vigna subterranea L. Verdc.) is an indigenous, drought-tolerant, underutilized African food legume, with the ability to fix atmospheric N2 in symbiosis with soil rhizobial bacteria. Our work aimed to analyze the genetic diversity of 15 bacteria isolated from root nodules of Bambara groundnut coded RVC in Côte d’Ivoire and to evaluate their symbiotic characteristic in order to select the most efficient strains as biofertilizers.

13p nguaconbaynhay7 15-08-2020 13 1 Download
Cytogenetic features in primary myelodysplastic syndrome Egyptian patients

Karyotype is the most important diagnostic and prognostic parameter in myelodysplastic syndromes (MDS) and is abnormal in approximately 50% of patients. We emphasized the importance of chromosomal analysis and reported the most frequent cytogenetic abnormalities in 50 MDS (29 males (58%) and 21 females (42%), median age: 57.5 years) Egyptian patients using conventional banding analysis (CBA). Karyotype description was conducted according to the International System for Human Cytogenetic Nomenclature (ISCN, 2013).

7p trinhthamhodang1 14-11-2019 17 1 Download
NEW ADVANCES IN STEM CELL TRANSPLANTATION

Humoral immunity is so named because it involves substances found in the humours, or body fluids. It is mediated by antibodies produced by cells of the B lymphocyte lineage. B cells, activated by the adaptive immune responses, transform into plasma cells which secrete antibodies. This process is aided by CD4+ T-helper 2 cells, which provide active co-stimulation. The secreted antibodies bind to antigens present on the surfaces of invading microbes, which marks them for subsequent destruction (Pier et al., 2004).

594p wqwqwqwqwq 23-07-2012 53 6 Download
Human Body II (Britannica Illustrated Science Library)

Humans (Homo sapiens[3][4][5]), the only living members of the genus Homo, are mammals of the primate order originally from Africa, where they reached anatomical modernity about 200,000 years ago and began to exhibit full behavioral modernity around 50,000 years ago.[6] The human lineage diverged from its last common ancestor with the chimpanzee some 5 million years ago in Africa, evolving into the Australopithecines and eventually the genus Homo.

56p kennybibo 10-07-2012 125 19 Download