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https://www.readbyqxmd.com/read/28431166/landscape-genetics-of-aedes-mcintoshi-diptera-culicidae-an-important-vector-of-rift-valley-fever-virus-in-northeastern-kenya
#1
Lindsay P Campbell, Alana M Alexander
Rift Valley fever virus (RVFV) is a vector-borne, zoonotic disease that affects humans, wild ungulates, and domesticated livestock in Africa and the Arabian Peninsula. Rift Valley fever virus exhibits interepizootic and epizootic phases, the latter defined by widespread virus occurrence in domesticated livestock. Kenya appears to be particularly vulnerable to epizootics, with 11 outbreaks occurring between 1951 and 2007. The mosquito species Aedes mcintoshi (subgenus Neomelaniconion) is an important primary vector for RVFV in Kenya...
April 18, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28431108/investments-in-children-s-health-and-the-kenyan-cash-transfer-for-orphans-and-vulnerable-children-evidence-from-an-unconditional-cash-transfer-scheme
#2
Carolyn Huang, Kavita Singh, Sudhanshu Handa, Carolyn Halpern, Audrey Pettifor, Harsha Thirumurthy
Child mortality is one of the most pressing global health and policy issues in the developing world. The leading drivers of death-pneumonia, diarrhea and malaria-are preventable and treatable. However, these illnesses are exacerbated by a lack of accessible nutrition, water, basic and preventive health services, and sanitary living conditions-all factors which are more likely to disproportionately impact the poor. We examine whether Kenya's largest social protection impacts children's incidence of upper respiratory illness...
April 18, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/28430988/prognostic-significance-of-surgical-extranodal-extension-in-head-and-neck-squamous-cell-carcinoma-patients
#3
Fumihiko Matsumoto, Taisuke Mori, Satoko Matsumura, Yoshifumi Matsumoto, Masahiko Fukasawa, Masanori Teshima, Kenya Kobayashi, Seiichi Yoshimoto
Background: Lymph node metastasis with extranodal extension represents one of the most important adverse prognostic factors for survival in patients with head and neck squamous cell carcinoma. We propose that extranodal extension occurs to differing extents. The aim of this study was to determine the prognostic significance of extranodal extension in patients with head and neck squamous cell carcinoma. Methods: Two hundred and ninety-eight patients with head and neck squamous cell carcinoma who underwent surgical resection and neck dissection were included...
April 18, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28427449/urolithiasis-analysis-in-a-multiethnic-population-at-a-tertiary-hospital-in-nairobi-kenya
#4
Francis K Wathigo, Alfred Hayombe, Daniel Maina
BACKGROUND: Urolithiasis is a global problem whose incidence is reported to be on the rise across the world. Previously, urolithiasis was reported as being rare among the indigenous African population but recent data suggest otherwise. This study reviewed the demographic and clinical characteristics of patients with urolithiasis seen at the Aga Khan University hospital Nairobi (AKUHN) as well as the chemical composition of the stones and the modalities of therapy used. METHODS: This was a retrospective study which utilized patients' clinical and laboratory records from 2013 to 2014...
April 20, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28427365/association-between-fc%C3%AE-receptor-iia-iiia-and-iiib-genetic-polymorphisms-and-susceptibility-to-severe-malaria-anemia-in-children-in-western-kenya
#5
Elly O Munde, Winnie A Okeyo, Evans Raballah, Samuel B Anyona, Tom Were, John M Ong'echa, Douglas J Perkins, Collins Ouma
BACKGROUND: Naturally-acquired immunity to Plasmodium falciparum malaria develops after several episodes of infection. Fc gamma receptors (FcγRs) bind to immunoglobulin G (IgG) antibodies and mediate phagocytosis of opsonized microbes, thereby, linking humoral and cellular immunity. FcγR polymorphisms influence binding affinity to IgGs and consequently, can influence clinical malaria outcomes. Specifically, variations in FcγRIIA -131Arg/His, FcγRIIIA-176F/V and FcγRIIIB-NA1/NA2 modulate immune responses through altered binding preferences to IgGs and immune complexes...
April 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28427357/haplotype-of-non-synonymous-mutations-within-il-23r-is-associated-with-susceptibility-to-severe-malaria-anemia-in-a-p-falciparum-holoendemic-transmission-area-of-kenya
#6
Elly O Munde, Evans Raballah, Winnie A Okeyo, John M Ong'echa, Douglas J Perkins, Collins Ouma
BACKGROUND: Improved understanding of the molecular mechanisms involved in pediatric severe malarial anemia (SMA) pathogenesis is a crucial step in the design of novel therapeutics. Identification of host genetic susceptibility factors in immune regulatory genes offers an important tool for deciphering malaria pathogenesis. The IL-23/IL-17 immune pathway is important for both immunity and erythropoiesis via its effects through IL-23 receptors (IL-23R). However, the impact of IL-23R variants on SMA has not been fully elucidated...
April 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28426727/cd4-t-cell-expression-of-ifn-%C3%AE-and-il-17-in-pediatric-malarial-anemia
#7
Evans Raballah, Prakasha Kempaiah, Zachary Karim, George O Orinda, Michael F Otieno, Douglas J Perkins, John Michael Ong'echa
In Plasmodium falciparum holoendemic transmission regions of western Kenya, life-threatening pediatric malaria manifests primarily as severe malarial anemia (SMA, Hb≤6.0 g/dL with any density parasitemia). To determine the role that CD4+ T-cell-driven inflammatory responses have in the pathogenesis of SMA, peripheral CD4+ T-cell populations and their intracellular production of pro-inflammatory cytokines (IFN-γ and IL-17) were characterized in children aged 12-36 months of age stratified into two groups: non-severe malarial anemia (non-SMA, Hb≥6...
2017: PloS One
https://www.readbyqxmd.com/read/28424462/dietary-behaviour-of-man-eating-lions-as-revealed-by-dental-microwear-textures
#8
Larisa R G DeSantis, Bruce D Patterson
Lions (Panthera leo) feed on diverse prey species, a range that is broadened by their cooperative hunting. Although humans are not typical prey, habitual man-eating by lions is well documented. Fathoming the motivations of the Tsavo and Mfuwe man-eaters (killed in 1898 in Kenya and 1991 in Zambia, respectively) may be elusive, but we can clarify aspects of their behaviour using dental microwear texture analysis. Specifically, we analysed the surface textures of lion teeth to assess whether these notorious man-eating lions scavenged carcasses during their depredations...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424253/identification-of-acute-hiv-1-infection-by-hologic-aptima-hiv-1-rna-qualitative-assay
#9
Mark M Manak, Leigh Anne Eller, Jennifer Malia, Linda L Jagodzinski, Rapee Trichavaroj, Joseph Oundo, Cornelia Lueer, Fatim Cham, Mark de Souza, Nelson L Michael, Merlin L Robb, Sheila A Peel
The Hologic Aptima HIV-1 Qualitative RNA assay was used in a rigorous screening approach designed to identify individuals at the earliest stage of HIV-1 infection for enrollment into subsequent studies of cellular and viral events in early infection (RV217/Early Capture HIV Cohort - ECHO Study). Volunteers at high risk of HIV-1 infection were recruited from study sites in Thailand, Tanzania, Uganda and Kenya with high HIV-1 prevalence rates among the populations examined. Small volume blood samples were collected by finger-stick at twice-weekly intervals and tested by Aptima...
April 19, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28424189/diagnostic-criteria-for-severe-acute-malnutrition-among-infants-aged-under-6-mo
#10
Martha Mwangome, Moses Ngari, Greg Fegan, Neema Mturi, Mohammed Shebe, Evasius Bauni, James A Berkley
Background: There is an increasing recognition of malnutrition among infants under 6 mo of age (U6M). Current diagnosis criteria use weight-for-length z scores (WLZs), but the 2006 WHO standards exclude infants shorter than 45 cm. In older children, midupper arm circumference (MUAC) predicts mortality better than does WLZ. Outcomes may also be influenced by exposure to HIV and size or gestational age at birth. Diagnostic thresholds for WLZ, MUAC, and other indexes have not been fully evaluated against mortality risk among U6M infants...
April 19, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28424031/yellow-fever-from-angola-and-congo-a-storm-gathers
#11
Qanta A Ahmed, Ziad A Memish
In common with Zika, Chikungunya and Dengue, Yellow Fever (YF) is an arthropod-borne flavivirus. It is transmitted between humans and from monkeys by mosquitoes of the Aedes aegypti (its principal vector), haemogogus and albopictus varieties. Three cycles of transmission may occur: urban; sylvatic; and intermediate. Recently, sub-Saharan Africa has seen the resurgence of this neglected disease. The current YF outbreak in Angola began in December 2015 in the capital Luanda and by October 2016 there had been > 4300 suspected cases, with 376 deaths (case fatality rate = 8...
April 2017: Tropical Doctor
https://www.readbyqxmd.com/read/28422835/predictive-factors-of-better-outcomes-by-monotherapy-of-an-antivascular-endothelial-growth-factor-drug-ranibizumab-for-diabetic-macular-edema-in-clinical-practice
#12
Shinri Sato, Hajime Shinoda, Norihiro Nagai, Misa Suzuki, Atsuro Uchida, Toshihide Kurihara, Mamoru Kamoshita, Yohei Tomita, Chigusa Iyama, Sakiko Minami, Kenya Yuki, Kazuo Tsubota, Yoko Ozawa
Intravitreal ranibizumab (IVR) has been approved for treating diabetic macular edema (DME), and is used in daily clinical practice. However, the treatment efficacies of IVR monotherapy in real-world clinical settings are not well known.The medical records of 56 eyes from 38 patients who received their first IVR for DME between April 2014 and March 2015, and were retreated with IVR monotherapy as needed with no rescue treatment, such as laser photocoagulation, were retrospectively reviewed. The clinical course, best-corrected visual acuity (BCVA), and fundus findings at baseline, before the initial IVR injection, and at 12 months, were evaluated...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28419352/dermatophytes-and-dermatophytosis-in-the-eastern-and-southern-parts-of-africa
#13
E I Nweze, I E Eke
Dermatophytosis is currently a disease of global importance and a public health burden. It is caused by dermatophytes, which attack and grow on dead animal keratin. Dermatophytes belong to three genera, namely, Epidermophyton, Microsporum, and Trichophyton. The predominant clinical forms and causative agents vary from one region of the world to another. Poor socioeconomic status, high population densities, and poor sanitary conditions are some of the factors responsible for the high prevalence of dermatophytosis in many developing countries, which include countries in southern and eastern Africa, the focus of this review...
April 17, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28418780/unique-phylogenetic-position-of-the-african-truffle-like-fungus-octaviania-ivoryana-boletaceae-boletales-and-the-proposal-of-a-new-genus-afrocastellanoa
#14
Takamichi Orihara, Matthew E Smith
The sequestrate (truffle-like) basidiomycete Octaviania ivoryana was originally described based on collections from Zimbabwe, Kenya, Guinea, and Senegal. This species has basidiomes that stain blue-green and basidiospores with crowded spines that are characteristic of the genus Octaviania. However, O. ivoryana is the only Octaviania species described from sub-Saharan Africa, and the phylogenetic relationship of the species to other species of Octaviania sensu stricto has not been previously investigated. We examined the phylogenetic position of the isotype and paratype specimens of O...
March 7, 2017: Mycologia
https://www.readbyqxmd.com/read/28418293/insecticide-treated-nets-and-protection-against-insecticide-resistant-malaria-vectors-in-western-kenya
#15
Eric Ochomo, Mercy Chahilu, Jackie Cook, Teresa Kinyari, Nabie M Bayoh, Philippa West, Luna Kamau, Aggrey Osangale, Maurice Ombok, Kiambo Njagi, Evan Mathenge, Lawrence Muthami, Krishanthi Subramaniam, Tessa Knox, Abraham Mnavaza, Martin James Donnelly, Immo Kleinschmidt, Charles Mbogo
Insecticide resistance might reduce the efficacy of malaria vector control. In 2013 and 2014, malaria vectors from 50 villages, of varying pyrethroid resistance, in western Kenya were assayed for resistance to deltamethrin. Long-lasting insecticide-treated nets (LLIN) were distributed to households at universal coverage. Children were recruited into 2 cohorts, cleared of malaria-causing parasites, and tested every 2 weeks for reinfection. Infection incidence rates for the 2 cohorts were 2.2 (95% CI 1.9-2.5) infections/person-year and 2...
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28416966/an-overview-of-mental-health-care-system-in-kilifi-kenya-results-from-an-initial-assessment-using-the-world-health-organization-s-assessment-instrument-for-mental-health-systems
#16
Mary A Bitta, Symon M Kariuki, Eddie Chengo, Charles R J C Newton
BACKGROUND: Little is known about the state of mental health systems in Kenya. In 2010, Kenya promulgated a new constitution, which devolved national government and the national health system to 47 counties including Kilifi County. There is need to provide evidence from mental health systems research to identify priority areas in Kilifi's mental health system for informing county health sector decision making. We conducted an initial assessment of state of mental health systems in Kilifi County and documented resources, policy and legislation and spectrum of mental, neurological and substance use disorders...
2017: International Journal of Mental Health Systems
https://www.readbyqxmd.com/read/28416560/horizontal-schools-based-health-programme-in-rural-kenya
#17
James Bogie, Ben Eder, Dan Magnus, Onguko David Amonje, Martina Gant
BACKGROUND: Primary school children in low-income countries are at risk of many diseases and poor health affects attendance, cognition and ability to learn. Developing school health and nutrition strategies has been extensively highlighted as a global priority, with a particular focus on complex programme design. However, such programmes are relatively untested in low-income settings. METHOD: We implemented a complex school health and nutrition programme in two schools in Western Kenya over 3 years...
April 17, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28411209/phylogeography-of-the-wild-and-cultivated-stimulant-plant-qat-catha-edulis-celastraceae-in-areas-of-historical-cultivation
#18
Luke R Tembrock, Mark P Simmons, Christopher M Richards, Patrick A Reeves, Ann Reilley, Manuel A Curto, Harald Meimberg, Grace Ngugi, Sebsebe Demissew, Abdul Wali Al Khulaidi, Mansoor Al-Thobhani, Sheron Simpson, Daniel M Varisco
PREMISE OF THE STUDY: Qat (Catha edulis, Celastraceae) is a woody plant species cultivated for its stimulant alkaloids. Qat is important to the economy and culture in large regions of Ethiopia, Kenya, and Yemen. Despite the importance of this species, the wild origins and dispersal of cultivars have only been described in often contradictory historical documents. We examined the wild origins, human-mediated dispersal, and genetic divergence of cultivated qat compared to wild qat. METHODS: We sampled 17 SSR markers and 1561 wild and cultivated individuals across the historical areas of qat cultivation...
April 14, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28410366/brief-educational-interventions-to-improve-performance-on-novel-quality-metrics-in-ambulatory-settings-in-kenya-a-multi-site-pre-post-effectiveness-trial
#19
Robert Ryan Korom, Stephanie Onguka, Peter Halestrap, Maureen McAlhaney, Mary Adam
BACKGROUND: The quality of primary care delivered in resource-limited settings is low. While some progress has been made using educational interventions, it is not yet clear how to sustainably improve care for common acute illnesses in the outpatient setting. Management of urinary tract infection is particularly important in resource-limited settings, where it is commonly diagnosed and associated with high levels of antimicrobial resistance. We describe an educational programme targeting non-physician health care providers and its effects on various clinical quality metrics for urinary tract infection...
2017: PloS One
https://www.readbyqxmd.com/read/28409951/electron-number-based-phase-diagram-of-pr_-1-x-lace_-x-cuo_-4-%C3%AE-and-possible-absence-of-disparity-between-electron-and-hole-doped-cuprate-phase-diagrams
#20
Dongjoon Song, Garam Han, Wonshik Kyung, Jeongjin Seo, Soohyun Cho, Beom Seo Kim, Masashi Arita, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi, Y Yoshida, H Eisaki, Seung Ryong Park, C Kim
We performed annealing and angle resolved photoemission spectroscopy studies on electron-doped cuprate Pr_{1-x}LaCe_{x}CuO_{4-δ} (PLCCO). It is found that the optimal annealing condition is dependent on the Ce content x. The electron number (n) is estimated from the experimentally obtained Fermi surface volume for x=0.10, 0.15 and 0.18 samples. It clearly shows a significant and annealing dependent deviation from the nominal x. In addition, we observe that the pseudo-gap at hot spots is also closely correlated with n; the pseudogap gradually closes as n increases...
March 31, 2017: Physical Review Letters
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