scholarly journals Correlation between environmental factors and COVID-19 indices: a global level ecological study

2021 ◽  
Author(s):  
Alireza Mirahmadizadeh ◽  
Fatemeh Rezaei ◽  
Kimia Jokari ◽  
Leyla Moftakhar ◽  
Abdolrasool Hemmati ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Ecological Study ◽  
Global Level

scholarly journals Correlates of environmental factors and human plague: an ecological study in Vietnam

2009 ◽  
Vol 38 (6) ◽  
pp. 1634-1641 ◽  
Author(s):  
H. V Pham ◽  
D. T Dang ◽  
N. N Tran Minh ◽  
N. D Nguyen ◽  
T. V Nguyen
Keyword(s):  
Environmental Factors ◽  
Ecological Study

scholarly journals Global-level population genomics reveals differential effects of geography and phylogeny on horizontal gene transfer in soil bacteria

2019 ◽  
Vol 116 (30) ◽  
pp. 15200-15209 ◽  
Author(s):  
Alex Greenlon ◽  
Peter L. Chang ◽  
Zehara Mohammed Damtew ◽  
Atsede Muleta ◽  
Noelia Carrasquilla-Garcia ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Population Genomics ◽  
Geographic Distance ◽  
Detectable Effect ◽  
Evolutionary Divergence ◽  
Phylogenetic Distance ◽  
Global Level ◽  
Bacterial Populations ◽  
Representative Subset ◽  
Evolutionary Relatedness

Although microorganisms are known to dominate Earth’s biospheres and drive biogeochemical cycling, little is known about the geographic distributions of microbial populations or the environmental factors that pattern those distributions. We used a global-level hierarchical sampling scheme to comprehensively characterize the evolutionary relationships and distributional limitations of the nitrogen-fixing bacterial symbionts of the crop chickpea, generating 1,027 draft whole-genome sequences at the level of bacterial populations, including 14 high-quality PacBio genomes from a phylogenetically representative subset. We find that diverse Mesorhizobium taxa perform symbiosis with chickpea and have largely overlapping global distributions. However, sampled locations cluster based on the phylogenetic diversity of Mesorhizobium populations, and diversity clusters correspond to edaphic and environmental factors, primarily soil type and latitude. Despite long-standing evolutionary divergence and geographic isolation, the diverse taxa observed to nodulate chickpea share a set of integrative conjugative elements (ICEs) that encode the major functions of the symbiosis. This symbiosis ICE takes 2 forms in the bacterial chromosome—tripartite and monopartite—with tripartite ICEs confined to a broadly distributed superspecies clade. The pairwise evolutionary relatedness of these elements is controlled as much by geographic distance as by the evolutionary relatedness of the background genome. In contrast, diversity in the broader gene content of Mesorhizobium genomes follows a tight linear relationship with core genome phylogenetic distance, with little detectable effect of geography. These results illustrate how geography and demography can operate differentially on the evolution of bacterial genomes and offer useful insights for the development of improved technologies for sustainable agriculture.

scholarly journals ANALISIS SPASIAL (TOPOGRAFI) TUBERKULOSIS PARU DI KOTA PARIAMAN, BUKITTINGGI, DAN DUMAI TAHUN 2010-2016

2020 ◽  
Vol 18 (3) ◽  
pp. 149-158
Author(s):  
Arinil Haq ◽  
Umar Fahmi Achmadi ◽  
Dewi Susanna
Keyword(s):  
Health Promotion ◽  
Spatial Analysis ◽  
Environmental Factors ◽  
Population Density ◽  
Strong Correlation ◽  
Ecological Study ◽  
District Health Office ◽  
District Health ◽  
Lower Altitude ◽  
Pulmonary Tb

ABSTRACT Tuberculosis (TB) is a disease that has become one of the global concerns. Various factors can increase the incidence of TB and facilitate transmission, one of which is environmental factors. This study aimed to understand the correlation between altitude, population density, and healthy home coverage with the proportion of smear-positive pulmonary TB in Pariaman, Bukittinggi and Dumai in 2010-2016. This study is an ecological study. The data of smear-positive pulmonary TB cases obtained from District Health Office were processed in aggregate at each sub-district in Pariaman, Bukittinggi and Dumai areas. Data were analyzed by correlation test and spatial analysis. The results of this study indicate that there is a strong correlation between altitude with the proportion of smear-positive pulmonary TB in Bukittinggi with direction of the correlation is negative, which mean that the higher the altitude the lower the pulmonary Tb case. It is suggested that area with lower altitude can focus more on promotion and prevention of pulmonary TB through health education or other health promotion measures. Keywords: Spatial analysis, pulmonary TB cases, altitude, population density, healthy home coverage   ABSTRAK Tuberkulosis (TB) adalah penyakit yang menjadi salah satu perhatian global. Berbagai faktor dapat meningkatkan kejadian TB dan mempermudah penularan, salah satunya adalah faktor lingkungan. Penelitian ini merupakan studi ekologis yang bertujuan untuk mengetahui korelasi antara ketinggian wilayah, kepadatan penduduk, dan cakupan rumah sehat dengan proporsi TB paru basil tahan asam (BTA) positif di Kota Pariaman, Bukittinggi, dan Dumai tahun 2010-2016. Data dianalisis dengan uji korelasi dan analisis spasial. Hasil penelitian ini menunjukkan bahwa diantara variabel yang diuji, hanya ketinggian wilayah yang berkorelasi kuat dengan proporsi TB paru BTA positif di Kota Bukittinggi.  Semakin tinggi wilayah maka semakin rendah kasus TB paru BTA positif di Kota Bukittinggi. Disarankan daerah dengan dataran yang lebih rendah dapat lebih fokus untuk melakukan upaya preventif dan promotif TB paru melalui kegiatan penyuluhan dan upaya promosi kesehatan lainnya. Kata kunci:Analisis spasial, angka kejadian TB paru, ketinggian wilayah, kepadatan penduduk, cakupan rumah sehat

Reductionist thinking and animal models in neuropsychiatric research

2019 ◽  
Vol 42 ◽  
Author(s):  
Nicole M. Baran
Keyword(s):  
Animal Models ◽  
Mental Disorders ◽  
Environmental Factors ◽  
Neuropsychiatric Disorders ◽  
Model Organisms ◽  
Developmental Genetic ◽  
Term Study ◽  
Genetic And Environmental Factors ◽  
Mechanisms Of Plasticity

AbstractReductionist thinking in neuroscience is manifest in the widespread use of animal models of neuropsychiatric disorders. Broader investigations of diverse behaviors in non-model organisms and longer-term study of the mechanisms of plasticity will yield fundamental insights into the neurobiological, developmental, genetic, and environmental factors contributing to the “massively multifactorial system networks” which go awry in mental disorders.

The dual nature of obesity in metabolic programming: quantity versus quality of adipose tissue

2020 ◽  
Vol 134 (18) ◽  
pp. 2447-2451
Author(s):  
Anissa Viveiros ◽  
Gavin Y. Oudit
Keyword(s):  
Adipose Tissue ◽  
Environmental Factors ◽  
Maternal Obesity ◽  
Metabolic Programming ◽  
Dual Nature ◽  
Prevalence Of Obesity ◽  
Adipose Tissue Volume ◽  
Males And Females ◽  
Metabolically Healthy

Abstract The global prevalence of obesity has been rising at an alarming rate, accompanied by an increase in both childhood and maternal obesity. The concept of metabolic programming is highly topical, and in this context, describes a predisposition of offspring of obese mothers to the development of obesity independent of environmental factors. Research published in this issue of Clinical Science conducted by Litzenburger and colleagues (Clin. Sci. (Lond.) (2020) 134, 921–939) have identified sex-dependent differences in metabolic programming and identify putative signaling pathways involved in the differential phenotype of adipose tissue between males and females. Delineating the distinction between metabolically healthy and unhealthy obesity is a topic of emerging interest, and the precise nature of adipocytes are key to pathogenesis, independent of adipose tissue volume.

Sign in / Sign up

Export Citation Format

Share Document