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https://www.readbyqxmd.com/read/28441780/pollen-grain-preservation-and-fertility-in-valuable-commercial-rose-cultivars
#1
Annalisa Giovannini, Anca Macovei, Matteo Caser, Andrea Mansuino, Gian Guido Ghione, Marco Savona, Daniela Carbonera, Valentina Scariot, Alma Balestrazzi
In the cut flower market, traditional breeding is still the best way to achieve new rose cultivars. The geographical delocalization of cultivar constitution (generally made in Europe and North America) and plant cultivation (large areas in Africa and South America) represents a limit point for crossing and selection. Rose breeders often need to overcome geographical distances, resulting in asynchrony in flowering among crossing parents, by storing and sending pollen. Hence, a key aspect in breeding programs is linked to pollen availability and conservation, jointly with the identification of parameters related to pollen fertility...
April 24, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28441697/hypertension-management-in-a-population-of-older-adults-in-rural-south-africa
#2
Thiago Veiga Jardim, Sheridan Reiger, Shafika Abrahams-Gessel, F Xavier Gomez-Olive, Ryan G Wagner, Alisha Wade, Till W Bärnighausen, Joshua Salomon, Stephen Tollman, Thomas A Gaziano
OBJECTIVE: Assess awareness, treatment, and control of hypertension, as an indication of its management, in rural South Africa, especially regarding modifiers of these variables. METHODS: A population-representative sample of adults aged at least 40 years residing in the rural Agincourt subdistrict (Mpumalanga Province) covered by a long-term health and sociodemographic surveillance system was recruited. In-person interviews, physical exams, and dried blood spots were collected...
June 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28441175/acceptability-and-use-of-a-dapivirine-vaginal-ring-in-a-phase-iii-trial
#3
Elizabeth T Montgomery, Ariane van der Straten, Miria Chitukuta, Krishnaveni Reddy, Kubashni Woeber, Millicent Atujuna, Linda-Gail Bekker, Juliane Etima, Teopista Nakyanzi, Ashley J Mayo, Ariana Katz, Nicole Laborde, Cynthia I Grossman, Lydia Soto-Torres, Thesla Palanee-Phillips, Jared M Baeten
BACKGROUND: The MTN-020/ASPIRE trial evaluated the safety and effectiveness of the dapivirine vaginal ring for prevention of HIV-1 infection among African women. A nested qualitative component was conducted at six of 15 study sites in Uganda, Malawi, Zimbabwe and South Africa to evaluate acceptability of and adherence to the ring. METHOD: Qualitative study participants (n = 214) were interviewed with one of three modalities: single in-depth interview, up to three serial interviews or an exit Focus Group Discussion...
May 15, 2017: AIDS
https://www.readbyqxmd.com/read/28440929/marine-and-freshwater-microplastic-research-in-south-africa
#4
Carina Verster, Karin Minnaar, Hindrik Bouwman
South Africa has a vibrant plastics manufacturing industry, but recycling is limited and insufficient with a notable proportion of the unmanaged waste entering the environment. South Africa is a developing country with microplastics research in its inception. Very little is known about freshwater microplastics, and studies on South African marine microplastics are limited but actively being pursued. In a water-scarce country, protection of freshwater resources remains a priority, but in the face of other socioeconomic issues (poverty, unemployment, and HIV/AIDS), it receives insufficiently effective attention...
May 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28440019/cervical-cancer-risk-and-impact-of-pap-based-screening-in-hiv-positive-women-on-antiretroviral-therapy-in-johannesburg-south-africa
#5
Eliane Rohner, Mazvita Sengayi, Bridgette Goeieman, Pamela Michelow, Cindy Firnhaber, Mhairi Maskew, Julia Bohlius
Data on invasive cervical cancer (ICC) incidence in HIV-positive women and the effect of cervical cancer screening in sub-Saharan Africa are scarce. We estimated i) ICC incidence rates in women (≥18 years) who initiated antiretroviral therapy (ART) at the Themba Lethu Clinic (TLC) in Johannesburg, South Africa, between 2004-2011; and ii) the effect of a Pap-based screening program. We included 10,640 women; median age at ART initiation: 35 years (interquartile range [IQR] 30-42), median CD4 count at ART initiation: 113 cells/µl (IQR 46-184)...
April 25, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28439466/arrival-and-diversification-of-mabuyine-skinks-squamata-scincidae-in-the-neotropics-based-on-a-fossil-calibrated-timetree
#6
Anieli Guirro Pereira, Carlos G Schrago
BACKGROUND: The evolution of South American Mabuyinae skinks holds significant biogeographic interest because its sister lineage is distributed across the African continent and adjacent islands. Moreover, at least one insular species, Trachylepis atlantica, has independently reached the New World through transoceanic dispersal. To clarify the evolutionary history of both Neotropical lineages, this study aimed to infer an updated timescale using the largest species and gene sampling dataset ever assembled for this group...
2017: PeerJ
https://www.readbyqxmd.com/read/28439454/distribution-and-establishment-of-the-alien-australian-redclaw-crayfish-cherax-quadricarinatus-in-south-africa-and-swaziland
#7
Ana L Nunes, Tsungai A Zengeya, Andries C Hoffman, G John Measey, Olaf L F Weyl
BACKGROUND: The Australian redclaw crayfish (Cherax quadricarinatus, von Martens), is native to Australasia, but has been widely translocated around the world due to aquaculture and aquarium trade. Mostly as a result of escape from aquaculture facilities, this species has established extralimital populations in Australia and alien populations in Europe, Asia, Central America and Africa. In South Africa, C. quadricarinatus was first sampled from the wild in 2002 in the Komati River, following its escape from an aquaculture facility in Swaziland, but data on the current status of its populations are not available...
2017: PeerJ
https://www.readbyqxmd.com/read/28439453/competition-and-feeding-ecology-in-two-sympatric-xenopus-species-anura-pipidae
#8
Solveig Vogt, F André de Villiers, Flora Ihlow, Dennis Rödder, John Measey
The widespread African clawed frog (Xenopus laevis) occurs in sympatry with the IUCN Endangered Cape platanna (Xenopus gilli) throughout its entire range in the south-western Cape, South Africa. In order to investigate aspects of the interspecific competition between populations of X. laevis and X. gilli, an assessment of their niche differentiation was conducted through a comprehensive study on food composition and trophic niche structure at two study sites: the Cape of Good Hope (CoGH) and Kleinmond. A total of 399 stomach contents of X...
2017: PeerJ
https://www.readbyqxmd.com/read/28439418/prevention-practices-influencing-frequency-of-occurrence-of-vaso-occlusive-crisis-among-sickle-cell-patients-in-abeokuta-south-local-government-area-of-ogun-state-nigeria
#9
Olorunfemi Emmanuel Amoran, Ahmed Babatunde Jimoh, Omotola Ojo, Temitope Kuponiyi
BACKGROUND: Africa is the most affected continent with 200,000 new born affected by sickle cell anemia annually with of 5% of under five deaths. Nigeria has the largest sickle cell gene pool in the world with about 2% of all babies born to Nigerian parents. This study therefore sets out to assess the prevention practices influencing the frequency of occurrence of vaso-occlusive crisis among patients in Ogun State. METHODS: This study is a descriptive cross-sectional study conducted in Abeokuta South Local Government Area Ogun State...
2017: BMC Hematology
https://www.readbyqxmd.com/read/28439190/review-metabolic-syndrome-in-black-south-african-women
#10
REVIEW
Philippe Jean-Luc Gradidge, Nigel J Crowther
The prevalence of metabolic syndrome is increasing in African populations, and is particularly high in Black South African women (42%) vs women in the United Kingdom (23%) and the United States of America (36%). This population group is also known to have the highest prevalence of obesity in the sub-Saharan African region (42%), and consequently, a high risk of non-communicable diseases. In this article, we discuss factors (abdominal subcutaneous fat, visceral fat, lean mass, adiponectin, leptin, vitamin D, smoking and menopausal status) that have been investigated for their possible association with metabolic syndrome in African women, and discuss some recommendations for management of the syndrome...
2017: Ethnicity & Disease
https://www.readbyqxmd.com/read/28439068/limited-genomic-consequences-of-hybridization-between-two-african-clawed-frogs-xenopus-gilli-and-x-laevis-anura-pipidae
#11
Benjamin L S Furman, Caroline M S Cauret, Graham A Colby, G John Measey, Ben J Evans
The Cape platanna, Xenopus gilli, an endangered frog, hybridizes with the African clawed frog, X. laevis, in South Africa. Estimates of the extent of gene flow between these species range from pervasive to rare. Efforts have been made in the last 30 years to minimize hybridization between these two species in the west population of X. gilli, but not the east populations. To further explore the impact of hybridization and the efforts to minimize it, we examined molecular variation in one mitochondrial and 13 nuclear genes in genetic samples collected recently (2013) and also over two decades ago (1994)...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438632/molecular-diagnostic-development-for-two-begomovirus-betasatellite-complexes-undergoing-diversification-a-case-study
#12
Judith K Brown, Muhammad Zia Ur-Rehman, Sofia Avelar, N Chingandu, Usman Hameed, Saleem Haider, Muhammad Ilyas
At least five begomoviral species that cause leaf curl disease of cotton have emerged recently in Asia and Africa, reducing fiber quality and yield. The potential for the spread of these viruses to other cotton-vegetable growing regions throughout the world is extensive, owing to routine, global transport of alternative hosts of the leaf curl viruses, especially ornamentals. The research reported here describes the design and validation of polymerase chain reaction (PCR) primers undertaken to facilitate molecular detection of the two most-prevalent leaf curl-associated begomovirus-betasatellite complexes in the Indian Subcontinent and Africa, the Cotton leaf curl Kokhran virus-Burewala strain and Cotton leaf curl Gezira virus, endemic to Asia and Africa, respectively...
April 21, 2017: Virus Research
https://www.readbyqxmd.com/read/28438553/human-leukocyte-antigen-class-i-a-b-and-c-allele-and-haplotype-variation-in-a-south-african-mixed-ancestry-population
#13
Shayne Loubser, Maria Paximadis, Caroline T Tiemessen
South Africa has a large (∼53 million), ethnically diverse population (black African, Caucasian, Indian/Asian and Mixed ancestry) and a high disease burden (particularly HIV-1 and Mycobacterium tuberculosis). The Mixed ancestry population constitutes ∼9% of the total population and was established ∼365 years ago in the Western Cape region through interracial mixing of black Africans, Europeans and Asians. Admixed populations present unique opportunities to identify genetic factors involved in disease susceptibility...
April 21, 2017: Human Immunology
https://www.readbyqxmd.com/read/28438159/prevalence-of-plasmodium-falciparum-and-non-p-falciparum-infections-in-a-highland-district-in-ghana-and-the-influence-of-hiv-and-sickle-cell-disease
#14
Ewurama D A Owusu, Charles A Brown, Martin P Grobusch, Petra Mens
BACKGROUND: In the past two decades, there has been a reported decline in malaria in Ghana and the rest of the world; yet it remains the number one cause of mortality and morbidity. Human immuno-deficiency virus (HIV) and sickle cell disease (SCD) share a common geographical space with malaria in sub-Saharan Africa and an interaction between these three conditions has been suggested. This study determined the Plasmodium falciparum and non-P. falciparum status of symptomatic and non-symptomatic residents of Mpraeso in the highlands of Kwahu-South district of Ghana based on evidence of current national decline...
April 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28438100/an-epidemiology-of-sexual-assault-among-elderly-women-in-the-mthatha-area-of-south-africa
#15
Banwari L Meel
Background South Africa has one of the highest rates of rape in the world, but this barely seems to surprise anyone. It is extremely disturbing, especially when children and elderly women are raped. Women and children are usually the weakest group in society physically, as well as the most exposed to abuse and neglect. It should be the responsibility of a civil society to protect these vulnerable groups from harm. Objective This study investigated the trend of rapes among elderly women in the Mthatha area of South Africa...
April 2017: Medicine, Science, and the Law
https://www.readbyqxmd.com/read/28436276/should-trained-lay-providers-perform-hiv-testing-a-systematic-review-to-inform-world-health-organization-guidelines
#16
C E Kennedy, P T Yeh, C Johnson, R Baggaley
New strategies for HIV testing services (HTS) are needed to achieve UN 90-90-90 targets, including diagnosis of 90% of people living with HIV. Task-sharing HTS to trained lay providers may alleviate health worker shortages and better reach target groups. We conducted a systematic review of studies evaluating HTS by lay providers using rapid diagnostic tests (RDTs). Peer-reviewed articles were included if they compared HTS using RDTs performed by trained lay providers to HTS by health professionals, or to no intervention...
April 24, 2017: AIDS Care
https://www.readbyqxmd.com/read/28435888/continental-drift-and-speciation-of-the-cryptococcus-neoformans-and-cryptococcus-gattii-species-complexes
#17
Arturo Casadevall, Joudeh B Freij, Christopher Hann-Soden, John Taylor
Genomic analysis has placed the origins of two human-pathogenic fungi, the Cryptococcus gattii species complex and the Cryptococcus neoformans species complex, in South America and Africa, respectively. Molecular clock calculations suggest that the two species separated ~80 to 100 million years ago. This time closely approximates the breakup of the supercontinent Pangea, which gave rise to South America and Africa. On the basis of the geographic distribution of these two species complexes and the coincidence of the evolutionary divergence and Pangea breakup times, we propose that a spatial separation caused by continental drift resulted in the emergence of the C...
March 2017: MSphere
https://www.readbyqxmd.com/read/28435428/in-silico-cd4-cd8-t-cell-and-b-cell-immunity-associated-immunogenic-epitope-prediction-and-hla-distribution-analysis-of-zika-virus
#18
Essam Mohammed Janahi, Anupam Dhasmana, Vandana Srivastava, Aditya Narayan Sarangi, Sana Raza, Jamal M Arif, Madan Lal Bramha Bhatt, Mohtashim Lohani, Mohammed Yahya Areeshi, Anand Murari Saxena, Shafiul Haque
Zika virus (ZIKV) is a mosquito-borne flavivirus distributed all over Africa, South America and Asia. The infection with the virus may cause acute febrile sickness that clinically resembles dengue fever, yet there is no vaccine, no satisfactory treatment, and no means of evaluating the risk of the disease or prognosis in the infected people. In the present study, the efficacy of the host's immune response in reducing the risk of infectious diseases was taken into account to carry out immuno-informatics driven epitope screening strategy of vaccine candidates against ZIKV...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28435048/morella-serrata-lam-killick-stabilizes-biomembrane-and-rejuvenates-sexual-competence-in-male-wistar-rats
#19
S Sabiu, Aot Ashafa
ETHNOPHARMACOLOGICAL RELEVANCE: Morella serrata L. is an indigenous medicinal plant to South and southern Africa with folkloric applications as aphrodisiac, laxative, antimicrobial, anti-inflammatory, analgesic, anti-hypertensive, antitussive and antidiabetic agent. AIM OF THE STUDY: This study evaluated the membrane stabilization and aphrodisiac potentials of its aqueous root extract in male Wistar rats. MATERIALS AND METHODS: While the membrane stabilization of the extract was investigated against bovine erythrocytes (BE), the male rats for the aphrodisiac study were randomized into five groups with animals in group 1 given sterile placebo and served as control...
April 20, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28434206/a-phylogeographic-investigation-of-the-kelp-genus-laminaria-laminariales-phaeophyceae-with-emphasis-on-the-south-atlantic-ocean
#20
Mark D Rothman, Lydiane Mattio, Robert J Anderson, John J Bolton
The genus Laminaria has a wide distribution range compared with other kelp genera because it is found in both the North and the South Atlantic, on both sides of the North Pacific, as well as in the Mediterranean. Hypotheses behind this biogeographical pattern have been discussed by several authors but have not yet been fully evaluated with time-calibrated phylogenies. Based on the analysis of four molecular markers (ITS2, rbcL, atp8 and trnWI), our goal was to reassess the Laminaria species diversity in South Africa, assess its relationship to the other species distributed in the South Atlantic and reconstruct the historical biogeography of the genus...
April 23, 2017: Journal of Phycology
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