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https://www.readbyqxmd.com/read/28103269/wildlife-population-dynamics-in-human-dominated-landscapes-under-community-based-conservation-the-example-of-nakuru-wildlife-conservancy-kenya
#1
Joseph O Ogutu, Bernard Kuloba, Hans-Peter Piepho, Erustus Kanga
Wildlife conservation is facing numerous and mounting challenges on private and communal lands in Africa, including in Kenya. We analyze the population dynamics of 44 common wildlife species in relation to rainfall variation in the Nakuru Wildlife Conservancy (NWC), located in the Nakuru-Naivasha region of Kenya, based on ground total counts carried out twice each year from March 1996 to May 2015. Rainfall in the region was quasi-periodic with cycle periods dependent on the rainfall component and varying from 2...
2017: PloS One
https://www.readbyqxmd.com/read/28103238/weak-genetic-structure-in-northern-african-dromedary-camels-reflects-their-unique-evolutionary-history
#2
Youcef Amine Cherifi, Suheil Bechir Semir Gaouar, Rosangela Guastamacchia, Khalid Ahmed El-Bahrawy, Asmaa Mohammed Aly Abushady, Abdoallah Aboelnasr Sharaf, Derradji Harek, Giovanni Michele Lacalandra, Nadhira Saïdi-Mehtar, Elena Ciani
Knowledge on genetic diversity and structure of camel populations is fundamental for sustainable herd management and breeding program implementation in this species. Here we characterized a total of 331 camels from Northern Africa, representative of six populations and thirteen Algerian and Egyptian geographic regions, using 20 STR markers. The nineteen polymorphic loci displayed an average of 9.79 ± 5.31 alleles, ranging from 2 (CVRL8) to 24 (CVRL1D). Average He was 0.647 ± 0.173. Eleven loci deviated significantly from Hardy-Weinberg proportions (P<0...
2017: PloS One
https://www.readbyqxmd.com/read/28102907/global-lessons-from-successful-rhinoceros-conservation-in-nepal
#3
Achyut Aryal, Krishna Prasad Acharya, Uttam Babu Shrestha, Maheshwar Dhakal, David Raubenhiemer, Wendy Wright
Global populations of rhinoceros have declined alarmingly, from about 500,000 at the beginning of the 20(th) century to 29,000 in 2016, largely due to an escalation of poaching for rhinoceros horn (Traffic 2016; Biggs et al. 2013). The current global rhino population is comprised of three Asian Species and two African species, the latter located in South Africa, Kenya, Tanzania, Namibia and Zimbabwe,. In Africa, the Southern white rhinoceros population is estimated at 20,700; and there are estimated to be around 4,885 black rhinoceros...
January 19, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/28102864/transthyretin-v122i-pv142i-cardiac-amyloidosis-an-age-dependent-autosomal-dominant-cardiomyopathy-too-common-to-be-overlooked-as-a-cause-of-significant-heart-disease-in-elderly-african-americans
#4
REVIEW
Joel N Buxbaum, Frederick L Ruberg
Since the identification of a valine-to-isoleucine substitution at position 122 (TTR V122I; pV142I) in the transthyretin (TTR)-derived fibrils extracted from the heart of a patient with late-onset cardiac amyloidosis, it has become clear that the amyloidogenic mutation and the disease occur almost exclusively in individuals of identifiable African descent. In the United States, the amyloidogenic allele frequency is 0.0173 and is carried by 3.5% of community-dwelling African Americans. Genotyping across Africa indicates that the origin of the allele is in the West African countries that were the major source of the slave trade to North America...
January 19, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28102610/outcomes-of-hiv-positive-patients-lost-to-follow-up-in-african-treatment-programs
#5
REVIEW
Kathrin Zürcher, Anne Mooser, Nanina Anderegg, Olga Tymejczyk, Margaret J Couvillon, Denis Nash, Matthias Egger
OBJECTIVE: The retention of patients on antiretroviral therapy (ART) is key to achieving global targets in response to the HIV epidemic. Loss to follow-up (LTFU) can be substantial, with unknown outcomes for patients lost to ART programs. We examined changes in outcomes of patients LTFU over calendar time, assessed associations with other studies and program characteristics, and investigated the relative success of different tracing methods. METHODS: We performed a systematic review and logistic random-effects meta-regression analysis of studies that traced adults or children who started ART and were LTFU in sub-Saharan African treatment programs...
January 19, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28102597/non-european-populations-still-underrepresented-in-genomic-testing-samples-dearth-of-african-american-latino-and-other-non-european-groups-contributes-to-healthcare-research-disparities
#6
(no author information available yet)
No abstract text is available yet for this article.
February 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28102267/a-theoretical-foundation-for-multi-scale-regular-vegetation-patterns
#7
Corina E Tarnita, Juan A Bonachela, Efrat Sheffer, Jennifer A Guyton, Tyler C Coverdale, Ryan A Long, Robert M Pringle
Self-organized regular vegetation patterns are widespread and thought to mediate ecosystem functions such as productivity and robustness, but the mechanisms underlying their origin and maintenance remain disputed. Particularly controversial are landscapes of overdispersed (evenly spaced) elements, such as North American Mima mounds, Brazilian murundus, South African heuweltjies, and, famously, Namibian fairy circles. Two competing hypotheses are currently debated. On the one hand, models of scale-dependent feedbacks, whereby plants facilitate neighbours while competing with distant individuals, can reproduce various regular patterns identified in satellite imagery...
January 18, 2017: Nature
https://www.readbyqxmd.com/read/28101934/detection-of-neonatal-unit-clusters-of-candida-parapsilosis-fungaemia-by-microsatellite-genotyping-results-from-laboratory-based-sentinel-surveillance-south-africa-2009-2010
#8
Rindidzani E Magobo, Serisha D Naicker, Jeannette Wadula, Maphoshane Nchabeleng, Yacoob Coovadia, Anwar Hoosen, Shawn R Lockhart, Nelesh P Govender
Neonatal candidaemia is a common, deadly and costly hospital-associated disease. To determine the genetic diversity of Candida parapsilosis causing fungaemia in South African neonatal intensive care units (NICUs). From February 2009 through to August 2010, cases of candidaemia were reported through laboratory-based surveillance. C. parapsilosis isolates from neonatal cases were submitted for identification by internal transcribed spacer (ITS) region sequencing, antifungal susceptibility testing and microsatellite genotyping...
January 19, 2017: Mycoses
https://www.readbyqxmd.com/read/28101908/recurrent-rearrangements-of-human-amylase-genes-create-multiple-independent-cnv-series
#9
Nzar A A Shwan, Sandra Louzada, Fengtang Yang, John A L Armour
The human amylase gene cluster includes the human salivary (AMY1) and pancreatic amylase genes (AMY2A and AMY2B), and is a highly variable and dynamic region of the genome. Copy number variation of AMY1 has been implicated in human dietary adaptation, and in population association with obesity, but neither of these findings has been independently replicated. Despite these functional implications, the structural genomic basis of copy number variation (CNV) has only been defined in detail very recently. In this work we use high-resolution analysis of copy number, and analysis of segregation in trios, to define new, independent allelic series of amylase CNVs in sub-Saharan Africans, including a series of higher-order expansions of a unit consisting of one copy each of AMY1, AMY2A and AMY2B...
January 19, 2017: Human Mutation
https://www.readbyqxmd.com/read/28101842/violence-exposure-subtypes-differentially-mediate-the-relation-between-callous-unemotional-traits-and-adolescent-delinquency
#10
Carla Oberth, Yao Zheng, Robert J McMahon
Research with children and adolescents has established a link between callous-unemotional (CU) traits and delinquency, as well as a link between violence exposure (witnessing and direct victimization) and diverse negative and antisocial outcomes. Little attention has been paid to investigating the association among CU traits, violence exposure, and various forms of delinquency. Using a sample of 753 adolescents (male =58%; African American =46%), the current study aimed to elucidate the mediating role of violence exposure (measured in grades 7, 8, 10, 11) on the relationship between CU traits measured in grade 7 and later delinquency (i...
January 19, 2017: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/28101534/pathogenicity-determinants-of-the-human-malaria-parasite-plasmodium-falciparum-have-ancient-origins
#11
Andrew J Brazier, Marion Avril, Maria Bernabeu, Maxwell Benjamin, Joseph D Smith
Plasmodium falciparum, the most deadly of the human malaria parasites, is a member of the Laverania subgenus that also infects African Great Apes. The virulence of P. falciparum is related to cytoadhesion of infected erythrocytes in microvasculature, but the origin of dangerous parasite adhesion traits is poorly understood. To investigate the evolutionary history of the P. falciparum cytoadhesion pathogenicity determinant, we studied adhesion domains from the chimpanzee malaria parasite P. reichenowi. We demonstrate that the P...
January 2017: MSphere
https://www.readbyqxmd.com/read/28101370/recurrent-ovarian-sertoli-leydig-cell-tumor-in-a-child-with-peutz-jeghers-syndrome
#12
Edward J Bellfield, Ramin Alemzadeh
We present a female child with Peutz-Jeghers syndrome (PJS) with a recurrent ovarian Sertoli-Leydig cell tumor (SLCT). SLCTs are relatively rare sex cord neoplasms that can occur in PJS. The patient was an African-American female who first presented at the age of 3 years with precocious puberty, and then at the age of 17 years with abdominal pain and irregular menses. In each case, she had resection of the mass, which included oophorectomy. To our knowledge, this is the first reported case in a child with PJS to have a recurrent ovarian SLCT...
August 2016: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28101127/mental-health-and-trauma-in-asylum-seekers-landing-in-sicily-in-2015-a-descriptive-study-of-neglected-invisible-wounds
#13
Anna Crepet, Francesco Rita, Anthony Reid, Wilma Van den Boogaard, Pina Deiana, Gaia Quaranta, Aurelia Barbieri, Francesco Bongiorno, Stefano Di Carlo
BACKGROUND: In 2015, Italy was the second most common point of entry for asylum seekers into Europe after Greece. The vast majority embarked from war-torn Libya; 80,000 people claimed asylum that year. Their medical conditions were assessed on arrival but their mental health needs were not addressed in any way, despite the likelihood of serious trauma before and during migration. Médecins sans Frontières (MSF), in agreement with the Italian Ministry of Health, provided mental health (MH) assessment and care for recently-landed asylum seekers in Sicily...
2017: Conflict and Health
https://www.readbyqxmd.com/read/28100911/variants-on-chromosome-4q21-near-pkd2-and-siblings-are-associated-with-dental-caries
#14
Scott Eckert, Eleanor Feingold, Margaret Cooper, Michael M Vanyukov, Brion S Maher, Rebecca L Slayton, Marcia C Willing, Steven E Reis, Daniel W McNeil, Richard J Crout, Robert J Weyant, Steven M Levy, Alexandre R Vieira, Mary L Marazita, John R Shaffer
A recent genome-wide association study (GWAS) for dental caries nominated the chromosomal region 4q21 near ABCG2, PKD2 and the SIBLING (small integrin-binding ligand N-linked glycoprotein) gene family. In this investigation, we followed up and fine-mapped this region using a tag-SNP (single-nucleotide polymorphism) approach in 13 age- and race-stratified samples from 6 independent studies (N=4089). Participants were assessed for dental caries via intraoral examination and 49 tag-SNPs were genotyped capturing much of the variation in the 4q21 locus...
January 19, 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/28100790/genome-wide-analysis-in-brazilians-reveals-highly-differentiated-native-american-genome-regions
#15
Josyf C Mychaleckyj, Alexandre Havt, Uma Nayak, Relana Pinkerton, Emily Farber, Patrick Concannon, Aldo A Lima, Richard L Guerrant
Despite its population, geographic size, and emerging economic importance, disproportionately little genome-scale research exists into genetic factors that predispose Brazilians to disease, or the population genetics of risk. After identification of suitable proxy populations and careful analysis of tri-continental admixture in 1,538 North-Eastern Brazilians to estimate individual ancestry and ancestral allele frequencies, we computed 400,000 genome-wide locus-specific branch length (LSBL) Fst statistics of Brazilian Amerindian ancestry compared to European and African; and a similar set of differentiation statistics for their Amerindian component compared to the closest Asian 1000 Genomes population (surprisingly, Bengalis in Bangladesh)...
January 18, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28100466/associations-of-accelerometer-measured-and-self-reported-sedentary-time-with-leukocyte-telomere-length-in-older-women
#16
Aladdin H Shadyab, Caroline A Macera, Richard A Shaffer, Sonia Jain, Linda C Gallo, Michael J LaMonte, Alexander P Reiner, Charles Kooperberg, Cara L Carty, Chongzhi Di, Todd M Manini, Lifang Hou, Andrea Z LaCroix
Few studies have assessed the association of sedentary time with leukocyte telomere length (LTL). In a cross-sectional study conducted in 2012-2013, we examined associations of accelerometer-measured and self-reported sedentary time with LTL in a sample of 1,481 older white and African-American women from the Women's Health Initiative and determined whether associations varied by level of moderate- to vigorous-intensity physical activity (MVPA). The association between sedentary time and LTL was evaluated using multiple linear regression models...
January 18, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28100268/upper-lip-metastasis-of-sarcomatoid-carcinoma-of-the-lung-an-unusual-site-of-disease-a-case-report
#17
Tri Le, Melissa Mayer, Joseph Sailors, David E Gerber, John M Truelson
BACKGROUND: Lip metastases are rare clinical events that are frequently mistaken for other diagnoses. For sarcomatoid lung carcinoma, a rare histologic variant of non-small cell lung cancer, the incidence and pattern of cutaneous spread is poorly understood. CASE PRESENTATION: We present a case of a 79-year-old African American man with a rapidly progressive upper lip cutaneous lesion that provided the first evidence of distant metastatic spread of sarcomatoid lung carcinoma...
January 19, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28100112/abortion-attitudes-among-south-africans-findings-from-the-2013-social-attitudes-survey
#18
Elizabeth A Mosley, Elizabeth J King, Amy J Schulz, Lisa H Harris, Nicole De Wet, Barbara A Anderson
Abortion is legal in South Africa, but over half of abortions remain unsafe there. Evidence suggests women who are (Black) African, of lower socioeconomic status, living with HIV, or residents of Gauteng, KwaZulu-Natal, or Limpopo provinces are disproportionately vulnerable to morbidity or mortality from unsafe abortion. Negative attitudes toward abortion have been documented in purposively sampled studies, yet it remains unclear what attitudes exist nationally or whether they differ across sociodemographic groups, with implications for inequities in service accessibility and health...
January 19, 2017: Culture, Health & Sexuality
https://www.readbyqxmd.com/read/28099874/igm-lgg-and-il-6-profiles-in-the-trypanosoma-brucei-brucei-monkey-model-of-human-african-trypanosomiasis
#19
Maxwell W Waema, Naomi W Maina, Maina Ngotho, Simon M Karanja, Beatrice M Gachie, Dawn N Maranga, John M Kagira
Human African trypanosomiasis (HAT) patients manifest immunological profiles, whose variations over time can be used to indicate disease progression. However, monitoring of these biomarkers in human patients is beset by several limitations which can be offset by using chronic animal models. A recent improved monkey model of HAT using a Trypanosoma brucei brucei isolate has been developed but the immunological profile has not been elucidated. The objectives of the current study was to determine the IgM, IgG and IL-6 profiles in blood and cerebrospinal fluid (CSF) in vervet monkeys infected with T...
January 15, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28099740/association-of-previous-severe-low-birth-weight-with-adverse-perinatal-outcomes-in-a-subsequent-pregnancy-among-hiv-prevalent-urban-african-women
#20
Marcela C Smid, Yusuf Ahmed, Marie C D Stoner, Bellington Vwalika, Elizabeth M Stringer, Jeffrey S A Stringer
OBJECTIVE: To evaluate the association between severity of prior low birth weight (LBW) delivery and adverse perinatal outcomes in the subsequent delivery among an HIV-prevalent urban African population. METHODS: A retrospective cohort study was conducted among 41 109 women who had undergone two deliveries in Lusaka, Zambia, between February 1, 2006, and May 31, 2013. The relationship between prior LBW delivery (<2500 g) and a composite measure of adverse perinatal outcome in the second pregnancy was assessed using multivariate logistic regression...
February 2017: International Journal of Gynaecology and Obstetrics
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