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https://www.readbyqxmd.com/read/28544663/from-song-dialects-to-speciation-in-white-crowned-sparrows
#1
David P L Toews
The behavioural signals used in mate selection are a key component in the evolution of premating isolating barriers and, subsequently, the formation of new species. The importance of mating signals has a long tradition of study in songbirds, where many species differ in their song characteristics. In oscine songbirds, individual birds usually learn their songs from a tutor. Mistakes during learning can help generate geographic dialects, akin to those within human language groups. In songbirds, dialect differences can often be substantial and there is an intuitive connection between the evolution of song amongst populations at a small scale, and the more substantive song differences between bird species and presumably used in species recognition...
June 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28542163/two-extended-haplotype-blocks-are-associated-with-adaptation-to-high-altitude-habitats-in-east-african-honey-bees
#2
Andreas Wallberg, Caspar Schöning, Matthew T Webster, Martin Hasselmann
Understanding the genetic basis of adaption is a central task in biology. Populations of the honey bee Apis mellifera that inhabit the mountain forests of East Africa differ in behavior and morphology from those inhabiting the surrounding lowland savannahs, which likely reflects adaptation to these habitats. We performed whole genome sequencing on 39 samples of highland and lowland bees from two pairs of populations to determine their evolutionary affinities and identify the genetic basis of these putative adaptations...
May 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28534821/from-genome-to-phenotype-an-integrative-approach-to-evaluate-the-biodiversity-of-lactococcus-lactis
#3
REVIEW
Valérie Laroute, Hélène Tormo, Christel Couderc, Muriel Mercier-Bonin, Pascal Le Bourgeois, Muriel Cocaign-Bousquet, Marie-Line Daveran-Mingot
Lactococcus lactis is one of the most extensively used lactic acid bacteria for the manufacture of dairy products. Exploring the biodiversity of L. lactis is extremely promising both to acquire new knowledge and for food and health-driven applications. L. lactis is divided into four subspecies: lactis, cremoris, hordniae and tructae, but only subsp. lactis and subsp. cremoris are of industrial interest. Due to its various biotopes, Lactococcus subsp. lactis is considered the most diverse. The diversity of L...
May 19, 2017: Microorganisms
https://www.readbyqxmd.com/read/28534224/characterization-of-mhc-class-i-in-a-long-distance-migratory-wader-the-icelandic-black-tailed-godwit
#4
Sara Pardal, Anna Drews, José A Alves, Jaime A Ramos, Helena Westerdahl
The major histocompatibility complex (MHC) encodes proteins that are central for antigen presentation and pathogen elimination. MHC class I (MHC-I) genes have attracted a great deal of interest among researchers in ecology and evolution and have been partly characterized in a wide range of bird species. So far, the main focus has been on species within the bird orders Galliformes and Passeriformes, while Charadriiformes remain vastly underrepresented with only two species studied to date. These two Charadriiformes species exhibit striking differences in MHC-I characteristics and MHC-I diversity...
May 23, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28533947/ungulates-rely-less-on-visual-cues-but-more-on-adapting-movement-behaviour-when-searching-for-forage
#5
Jan A Venter, Herbert H T Prins, Alla Mashanova, Rob Slotow
Finding suitable forage patches in a heterogeneous landscape, where patches change dynamically both spatially and temporally could be challenging to large herbivores, especially if they have no a priori knowledge of the location of the patches. We tested whether three large grazing herbivores with a variety of different traits improve their efficiency when foraging at a heterogeneous habitat patch scale by using visual cues to gain a priori knowledge about potential higher value foraging patches. For each species (zebra (Equus burchelli), red hartebeest (Alcelaphus buselaphus subspecies camaa) and eland (Tragelaphus oryx)), we used step lengths and directionality of movement to infer whether they were using visual cues to find suitable forage patches at a habitat patch scale...
2017: PeerJ
https://www.readbyqxmd.com/read/28533575/antihypertensive-effects-of-hydroalcoholic-extract-of-crataegus-azarolus-subspecies-aronia-fruit-in-rats-with-renovascular-hypertension-an-experimental-mechanistic-study
#6
Mohammad Reza Haydari, Mohammad Reza Panjeshahin, Elaheh Mashghoolozekr, Ali Akbar Nekooeian
BACKGROUND: Hawthorn species decreases blood pressure and relaxes precontracted vessels. This study aimed at examining the antihypertensive effect and related mechanisms of hydroalcoholic extract of Crataegus azarolus subspecies aronia fruit in rats with renovascular hypertension. METHODS: Six groups of male Sprague-Dawley rats, each containing 6 to 8 rats, were studied. The groups comprised of one sham group and 5 renal artery-clipped groups. The sham group received vehicle (distilled water 0...
May 2017: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28532994/johne-s-disease-in-the-eyes-of-irish-cattle-farmers-a-qualitative-narrative-research-approach-to-understanding-implications-for-disease-management
#7
Conor G McAloon, Áine Macken-Walsh, Lisa Moran, Paul Whyte, Simon J More, Luke O'Grady, Michael L Doherty
Bovine Johne's Disease (JD) is a disease characterised by chronic granulomatous enteritis which manifests clinically as a protein-losing enteropathy causing diarrhoea, hypoproteinaemia, emaciation and, eventually death. Some research exists to suggest that the aetiologic pathogen Mycobacterium avium subspecies paratuberculosis may pose a zoonotic risk. Nationally coordinated control programmes have been introduced in many of the major milk producing countries across the world. However, JD is challenging to control in infected herds owing to limitations of diagnostic tests and the long incubation period of the disease...
June 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28532788/a-comparative-study-evaluating-the-efficacy-of-is_map04-with-is900-and-is_map02-as-a-new-diagnostic-target-for-the-detection-of-mycobacterium-avium-subspecies-paratuberculosis-from-bovine-faeces
#8
Marcel de Kruijf, Rodney Govender, Dermot Yearsley, Aidan Coffey, Jim O'Mahony
The aim of this study was to investigate the efficacy of IS_MAP04 as a potential new diagnostic quantitative PCR (qPCR) target for the detection of Mycobacterium avium subspecies paratuberculosis from bovine faeces. IS_MAP04 primers were designed and tested negative against non-MAP strains. The detection limit of IS_MAP04 qPCR was evaluated on different MAP K-10 DNA concentrations and on faecal samples spiked with different MAP K-10 cell dilutions. A collection of 106 faecal samples was analysed and the efficacy of IS_MAP04 was statistically compared with IS900 and IS_MAP02...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28528730/sir-charles-bell-unheralded-laryngologist
#9
Elliot Abemayor
INTRODUCTION: Sir Charles Bell is renowned and revered as an outstanding surgeon, anatomist, clinician and teacher and his many contributions to various medical fields have been amply described. What are less well-known are his contributions to the field of laryngology. METHODS: Selected clinical and physiological publications by Bell were examined that addressed issues related specifically to the airway or pharynx. These included both case reports and case series...
April 21, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28527078/our-headache-fellowship-a-10-year-history
#10
Paul Rizzoli
There has been a clear trend in American medical education after World War II toward training specialization and subspecialization. After some early specialization efforts by the American Board of Psychiatry and Neurology, further efforts were undertaken by the United Council for Neurologic Subspecialties (UCNS), leading to the introduction of the neurologic subspecialty of Headache Medicine in March, 2005. The training program at our center at the Brigham and Women's Hospital Department of Neurology, Harvard Medical School, in Boston, Massachusetts, was accredited in 2008 and has graduated 14 trainees since its inception...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28524717/first-molecular-evidence-of-mus-musculus-bactrianus-in-nepal-inferred-from-the-mitochondrial-dna-cytochrome-b-gene-sequences
#11
Pradeep Adhikari, Sang-Hyun Han, Yoo-Kyung Kim, Tae-Wook Kim, Tej Bahadur Thapa, Naresh Subedi, Prabhat Adhikari, Hong-Shik Oh
To identify the house mice collected in Pokhara and Lumbini of Nepal at the subspecies level, morphological and molecular analyses were carried out. Morphologically, two populations collected in Pokhara and Lumbini were distinguished by fur colour, but there was no significant difference in external measurements (p > .05). The phylogenetic analysis results revealed that the haplotypes sequences of mitochondrial DNA (mtDNA) Cytochrome B (CytB) gene distinguished into two distinct clades on a phylogenetic tree representing two subspecies, Mus musculus bactrianus and M...
May 19, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28522316/mycobacteriological-characteristics-and-treatment-outcomes-in-extrapulmonary-mycobacterium-abscessus-complex-infection
#12
Suk Hyeon Jeong, Su-Young Kim, Hee Jae Huh, Chang-Seok Ki, Nam Yong Lee, Cheol-In Kang, Doo Ryeon Chung, Kyong Ran Peck, Sung Jae Shin, Won-Jung Koh
OBJECTIVES: Differentiation between Mycobacterium abscessus and M. massiliense and determination of the presence of inducible resistance to macrolide antibiotics are important factors in the management of patients with M. abscessus complex (MABC) infection. Unlike pulmonary MABC infection, little information on extrapulmonary MABC infection is available. METHODS: We performed molecular identification of clinical isolates and assessed the clinical characteristics and treatment outcomes of 20 consecutive patients with extrapulmonary MABC infections...
May 15, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28521263/gamma-interferon-responses-to-proteome-determined-specific-recombinant-proteins-in-cattle-experimentally-and-naturally-infected-with-paratuberculosis
#13
Valerie Hughes, Jim McNair, Samuel Strain, Claire Barry, Joyce McLuckie, Mintu Nath, George Caldow, Karen Stevenson
Johne's disease (JD), is a fatal enteritis of animals caused by infection with Mycobacterium avium subspecies paratuberculosis (Map). Diagnosis of subclinical JD is problematic as test sensitivity is limited. Th1 responses to Map are activated early, thus detection of a cell-mediated response, indicated by measuring interferon gamma (IFN-γ) stimulated by mycobacterial antigens, may give the first indication of sub-clinical infection. Crude extracts of Map (PPDJ) have been used to detect the cell-mediated response in infected cattle...
April 29, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28520887/apolipoprotein-c-iii-and-high-density-lipoprotein-subspecies-defined-by-apolipoprotein-c-iii-in-relation-to-diabetes-risk
#14
Sarah A Aroner, Ming Yang, Junlong Li, Jeremy D Furtado, Frank M Sacks, Anne Tjønneland, Kim Overvad, Tianxi Cai, Majken K Jensen
Apolipoprotein C-III (apoC-III) is a potential novel biomarker that may play an important role in the pathogenesis of diabetes, particularly when present on high-density lipoprotein (HDL). In a case-cohort design among 3,101 non-cases and 434 incident diabetes cases occurring before 2007 in the Danish Diet, Cancer, and Health study, we examined associations of baseline (1993-1997) plasma concentrations of apoC-III and subspecies of HDL defined by the presence or absence of apoC-III with risk of diabetes using Cox regression...
May 18, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28516032/a-case-of-respiratory-infection-possibly-caused-by-mycobacterium-triviale-current-problems-on-diagnostic-and-therapeutic-strategies
#15
Asako Okabayashi, Mizue Hasegawa, Akitoshi Sato, Hideki Katsura, Toshiko Kamata, Eitetsu Koh, Yasuo Sekine
Mycobacterium triviale is a subspecies of the Mycobacterium terrae complex, which rarely causes disease in humans. We encountered a case of respiratory infection, possibly caused by M. triviale, which was successfully treated by levofloxacin and clarithromycin. Although DNA-DNA hybridization identified M. triviale in one of three samples, clinical validations convinced us that it was the pathogen. 16s ribosomal RNA sequencing would have been reliable and ideal to perform in this case, although it is not covered by the insurance system in Japan...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28515876/population-genomics-reveals-a-candidate-gene-involved-in-bumble-bee-pigmentation
#16
Meaghan L Pimsler, Jason M Jackson, Jeffrey D Lozier
Variation in bumble bee color patterns is well-documented within and between species. Identifying the genetic mechanisms underlying such variation may be useful in revealing evolutionary forces shaping rapid phenotypic diversification. The widespread North American species Bombus bifarius exhibits regional variation in abdominal color forms, ranging from red-banded to black-banded phenotypes and including geographically and phenotypically intermediate forms. Identifying genomic regions linked to this variation has been complicated by strong, near species level, genome-wide differentiation between red- and black-banded forms...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28515134/identification-of-novel-seroreactive-antigens-in-johne-s-disease-cattle-using-the-mycobacterium-tuberculosis-protein-array
#17
John P Bannantine, Joseph J Campo, Lingling Li, Arlo Randall, Jozelyn Pablo, Craig A Praul, Juan Antonio Raygoza Garay, Judith R Stabel, Vivek Kapur
Johne's Disease, a chronic gastrointestinal inflammatory disease caused by Mycobacterium avium subspecies paratuberculosis (Map), is endemic in dairy cattle and other ruminants worldwide and remains a challenge to diagnose using traditional serological methods. Given the close phylogenetic relationship between Map and the human pathogen, Mycobacterium tuberculosis (Mtb), we here applied a whole proteome Mtb protein array to identify seroreactive and diagnostic Map antigens. A genome-scale pairwise analysis of amino acid identity between orthologous proteins in Map and Mtb showed an average of 62% identity, with more than half the orthologous proteins sharing > 75% identity...
May 17, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28514630/speciation-and-the-latitudinal-diversity-gradient-insights-from-the-global-distribution-of-endemic-fish
#18
Patrick J Hanly, Gary G Mittelbach, Douglas W Schemske
The nearly universal pattern that species richness increases from the poles to the equator (the latitudinal diversity gradient [LDG]) has been of intense interest since its discovery by early natural-history explorers. Among the many hypotheses proposed to explain the LDG, latitudinal variation in (1) productivity, (2) time and area available for diversification, and (3) speciation and/or extinction rates have recently received the most attention. Because tropical regions are older and were formerly more widespread, these factors are often intertwined, hampering efforts to distinguish their relative contributions to the LDG...
June 2017: American Naturalist
https://www.readbyqxmd.com/read/28513902/prospective-analysis-of-radiation-oncology-image-and-plan-driven-peer-review-for-head-and-neck-cancer
#19
Sakellarios Zairis, Danielle N Margalit, Trevor J Royce, William D Powlis, Roy B Tishler, Jonathan D Schoenfeld
BACKGROUND: Departmental "chart rounds" is an established form of review in radiation oncology, however, evidence is lacking that identifies links between features of a more subspecialized disease site-specific review and the likelihood and characteristics of recommendations made. We prospectively analyzed our head and neck group's review process to identify associations that could guide future practice. METHODS: Our group reviewed proposed management and treatment volumes for radiation simulated patients on a weekly basis, and we collected data encompassing recommendations made by individuals or group consensus...
May 17, 2017: Head & Neck
https://www.readbyqxmd.com/read/28512060/characterization-and-phylogenetic-analysis-of-complete-mitochondrial-genomes-for-two-desert-cyprinodontoid-fishes-empetrichthys-latos-and-crenichthys-baileyi
#20
Miguel Jimenez, Shawn C Goodchild, Craig A Stockwell, Sean C Lema
The Pahrump poolfish (Empetrichthys latos) and White River springfish (Crenichthys baileyi) are small-bodied teleost fishes (order Cyprinodontiformes) endemic to the arid Great Basin and Mojave Desert regions of western North America. These taxa survive as small, isolated populations in remote streams and springs and evolved to tolerate extreme conditions of high temperature and low dissolved oxygen. Both species have experienced severe population declines over the last 50-60years that led to some subspecies being categorized with protected status under the U...
May 13, 2017: Gene
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