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https://www.readbyqxmd.com/read/28636631/incidence-and-mortality-due-to-snakebite-in-the-americas
#1
Jean-Philippe Chippaux
BACKGROUND: Better knowledge of the epidemiological characteristics of snakebites could help to take measures to improve their management. The incidence and mortality of snakebites in the Americas are most often estimated from medical and scientific literature, which generally lack precision and representativeness. METHODOLOGY/PRINCIPAL FINDINGS: Authors used the notifications of snakebites treated in health centers collected by the Ministries of Health of the American countries to estimate their incidence and mortality...
June 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28635138/snake-spectacle-vessel-permeability-to-sodium-fluorescein
#2
Roy W Bellhorn, Ann R Strom, Monica J Motta, John Doval, Michelle G Hawkins, Joanne Paul-Murphy
OBJECTIVE: Assess vascular permeability of the snake spectacle to sodium fluorescein during resting and shedding phases of the ecdysis cycle. ANIMAL STUDIED: Ball python (Python regius). PROCEDURES: The snake was anesthetized, and spectral domain optic coherence tomography was performed prior to angiographic procedures. An electronically controlled digital single-lens reflex camera with a dual-head flash equipped with filters suitable for fluorescein angiography was used to make images...
June 20, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28633930/phospholipase-a2-in-the-venom-of-three-cottonmouth-snake-species
#3
Ying Jia, Boris Ermolinsky, Aryana Garza, Daniele Provenzano
Two phospholipase A2s (PLA2s), Asp49 (D49) and Lys49 (K49), were purified by one-step reverse-phase high performance liquid chromatography (RP-HPLC) from the venom of each of the three subspecies of cottonmouth snake, Western cottonmouth (Agkistrodon piscivorus leucostoma; Apl), Eastern cottonmouth (Agkistrodon piscivorus piscivorus; App) and Florida cottonmouth (Agkistrodon piscivorus conanti; Apc). Venom protein profiles and PLA2s elution pattern of the three cottonmouth snakes were remarkably similar displaying four similar sharp and two wide peaks; in all cases K49 PLA2 eluted first followed by D49 PLA2...
June 17, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28632275/architectures-of-soft-robotic-locomotion-enabled-by-simple-mechanical-principles
#4
Liangliang Zhu, Yunteng Cao, Yilun Liu, Zhe Yang, Xi Chen
In nature, a variety of limbless locomotion patterns flourish, from the small or basic life forms (Escherichia coli, amoebae, etc.) to the large or intelligent creatures (e.g., slugs, starfishes, earthworms, octopuses, jellyfishes, and snakes). Many bioinspired soft robots based on locomotion have been developed in the past few decades. In this work, based on the kinematics and dynamics of two representative locomotion modes (i.e., worm-like crawling and snake-like slithering), we propose a broad set of innovative designs for soft mobile robots through simple mechanical principles...
June 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28630406/emerging-fungal-pathogen-ophidiomyces-ophiodiicola-in-wild-european-snakes
#5
Lydia H V Franklinos, Jeffrey M Lorch, Elizabeth Bohuski, Julia Rodriguez-Ramos Fernandez, Owen N Wright, Liam Fitzpatrick, Silviu Petrovan, Chris Durrant, Chris Linton, Vojtech Baláž, Andrew A Cunningham, Becki Lawson
Snake fungal disease (SFD) is an emerging disease of conservation concern in eastern North America. Ophidiomyces ophiodiicola, the causative agent of SFD, has been isolated from over 30 species of wild snakes from six families in North America. Whilst O. ophiodiicola has been isolated from captive snakes outside North America, the pathogen has not been reported from wild snakes elsewhere. We screened 33 carcasses and 303 moulted skins from wild snakes collected from 2010-2016 in Great Britain and the Czech Republic for the presence of macroscopic skin lesions and O...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630199/genome-wide-analysis-of-the-antimicrobial-peptides-in-python-bivittatus-and-characterization-of-cathelicidins-with-potent-antimicrobial-activity-and-low-cytotoxicity
#6
Dayeong Kim, Nagasundarapandian Soundrarajan, Juyeon Lee, Hye-Sun Cho, Minkyeung Choi, Se-Yeoun Cha, Byeongyong Ahn, Hyoim Jeon, Minh Thong Le, Hyuk Song, Jin-Hoi Kim, Chankyu Park
In this study, we sought to identify novel antimicrobial peptides (AMPs) in Python bivittatus through bioinformatic analyses of publicly available genome information and experimental validation. In our analysis of the python genome, we identified 29 AMP-related candidate sequences. Of these, we selected five cathelicidin-like sequences and subjected them to further in silico analyses. The results showed that these sequences likely have antimicrobial activity. The sequences were named Pb-CATH1-Pb-CATH5 according to their sequence similarity to previously reported snake cathelicidins...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28629414/fibrinogen-deficiency-in-a-dog-a-case-report
#7
Franck Jolivet, Armelle Diquélou, Catherine Trumel, Simon Privat, Olivier Dossin
BACKGROUND: Among coagulation disorders, primary fibrinogen deficiency is very rare in dogs. It is divided into hypofibrinogenemia, afibrinogenemia and dysfibrinogenemia. Afibrinogenemia has been described in three dogs. There are, however, no published case reports of primary hypofibrinogenemia in dogs. CASE PRESENTATION: A 1.5 year-old male German Pointer dog was evaluated for a locked-jaw syndrome associated with eye protrusion which appeared after a minor head trauma...
June 19, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28627854/swiss-and-tropical-snakebites-the-clinical-management
#8
Laurence Rochat, Gabriel Alcoba
With increasing trips to tropical areas, as well as a high number of venomous snake holders in the country, the frequency of snake bites is likely to increase. Even if in 50 % of cases, the bites do not lead to clinical envenoming, rapid and effective management is essential to successful treatment, which includes supply with the polyvalent or specific antivenom and recognition of the signs and symptoms justifying its administration. We will deal here mainly with local and tropical snake envenoming that Swiss practitioners could encounter in their offices or the emergency rooms and propose scenarios according to the syndromes...
May 3, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28625888/combined-venom-profiling-and-cytotoxicity-screening-of-the-radde-s-mountain-viper-montivipera-raddei-and-mount-bulgar-viper-montivipera-bulgardaghica-with-potent-cytotoxicity-against-human-a549-lung-carcinoma-cells
#9
Ayse Nalbantsoy, Benjamin-Florian Hempel, Daniel Petras, Paul Heiss, Bayram Göçmen, Nasit Iğci, Mehmet Zülfü Yildiz, Roderich D Süssmuth
Here we report the first characterization of the endemic Mount Bulgar Viper (Montivipera bulgardaghica) and Radde's mountain viper (Montivipera raddei) venom by a combined approach using intact mass profiling and bottom-up proteomics. The cytotoxicity screening of crude venom as well as isolated serine proteases revealed a high activity against A549 human lung carcinoma cells. By means of intact mass profiling of native and reduced venom we observed basic and acidic phospholipases type A2. Moreover, the analysis revealed snake venom metalloproteases, cysteine-rich secretory proteins, disintegrins, snake venom serine proteases, C-type lectins, a vascular endothelial growth factor and an L-amino acid oxidase...
June 15, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28623383/ethnopharmacological-uses-phytochemistry-biological-activities-and-biotechnological-applications-of-eclipta-prostrata
#10
REVIEW
Ill-Min Chung, Govindasamy Rajakumar, Ji-Hee Lee, Seung-Hyun Kim, Muthu Thiruvengadam
Eclipta prostrata belongs to a family of medicinal plants (Asteraceae) and plays a role in the treatment of several diseases, including infectious hepatitis, snake venom poisoning, gastritis, and respiratory diseases such as a cough and asthma. A number of compounds, including thiophene derivatives, steroids, triterpenes, flavonoids, polyacetylenes, polypeptides, and coumestans, have been isolated from E. prostrata. The plant functional compounds can act as reducing agent in the field of nanoparticle synthesis...
June 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28623170/nicotinic-acetylcholine-receptor-inhibitors-derived-from-snake-and-snail-venoms
#11
REVIEW
Sebastien Dutertre, Annette Nicke, Victor Tsetlin
The nicotinic acetylcholine receptor (nAChR) represents the prototype of ligand-gated ion channels. It is vital for neuromuscular transmission and an important regulator of neurotransmission. A variety of toxic compounds derived from diverse species target this receptor and have been of elemental importance in basic and applied research. They enabled milestone discoveries in pharmacology and biochemistry ranging from the original formulation of the receptor concept, the first isolation and structural analysis of a receptor protein (the nAChR) to the identification, localization, and differentiation of its diverse subtypes and their validation as a target for therapeutic intervention...
June 13, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28622447/does-sexual-selection-influence-ornamentation-of-hemipenes-in-old-world-snakes
#12
Kostadin Andonov, Nikolay Natchev, Yurii V Kornilev, Nikolay Tzankov
In the present study, we investigated and documented the morphology of the male copulatory organs (hemipenes) in fifteen wide-ranging snake species. The species represent four families (Boidae, Colubridae, Lamprophiidae, and Viperidae) and ten genera. We applied the same preparation techniques for all species, successfully everting and expanding the organs completely. The detailed description of the general morphology of the male copulatory organs was based on 31 specimens. Our data were compared with published observations and we point out some incorrectly described details in previous investigations...
June 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28617656/sarcocystis-pantherophis-n-sp-from-eastern-rat-snakes-pantherophis-alleghaniensis-definitive-hosts-and-interferon-gamma-gene-knockout-mice-as-experimental-intermediate-hosts
#13
Shiv Verma, David Lindsay, Joseph Mowery, Benjamin Rosenthal, J P Dubey
Here we report a new species, Sarcocystis pantherophisi n. sp. with the Eastern rat snake (Pantherophis alleghaniensis) as natural definitive host and the interferon gamma gene knockout (KO) mouse as the experimental intermediate host. Sporocysts (n = 15) from intestinal contents of the snake were 17.3 x 10.9 µm. Sporocysts were orally infective to interferon gamma KO mice but not to laboratory raised albino outbred house mice (Mus musculus). The interferon gamma KO mice developed schizont-associated neurological signs and schizonts were cultivated in vitro from the brain...
June 15, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28616487/wild-snakes-harbor-west-nile-virus
#14
C R Dahlin, D F Hughes, W E Meshaka, C Coleman, J D Henning
West Nile virus (WNV) has a complex eco-epidemiology with birds acting as reservoirs and hosts for the virus. Less well understood is the role of reptiles, especially in wild populations. The goal of our study was to determine whether a wild population of snakes in Pennsylvania harbored WNV. Six species of snakes were orally sampled in the summer of 2013 and were tested for the presence of WNV viral RNA using RT-PCR. Two Eastern Garter Snakes, Thamnophis sirtalis sirtalis tested positive for viral RNA (2/123, 1...
December 2016: One Health
https://www.readbyqxmd.com/read/28612300/effects-of-photobiomodulation-therapy-on-bothrops-moojeni-snake-envenomed-gastrocnemius-of-mice-using-enzymatic-biomarkers
#15
Doroty Mesquita Dourado, Rosemary Matias, Marcos Barbosa-Ferreira, Baldomero Antonio Kato da Silva, Jéssica de Araujo Isaias Muller, Willians Fernando Vieira, Maria Alice da Cruz-Höfling
Bothropic venom contains a range of biologically active substances capable of causing severe local and systemic envenoming symptomatology within its victims. The snake anti-venom is effective against systemic effects but has no neutralizing effect against the fast developing local effects. Herein, mice gastrocnemius injected with Bothrops moojeni venom (40 μg/kg) or saline solution were irradiated with HeNe (632.8 nm) and GaAs (904 nm) lasers (daily energy density of 4 J/cm(2); 0.03/0.21 power density; 0...
June 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28609885/a-new-species-of-rhinophis-hemprich-1820-serpentes-uropeltidae-from-the-central-hills-of-sri-lanka
#16
L J Mendis Wickramasinghe, Dulan Ranga Vidanapathirana, M D Gehan Rajeev, David J Gower
A new species of uropeltid snake, Rhinophis roshanpererai sp. nov., is described based on three specimens from Badulla District, Sri Lanka. The new species is distinguished from its congeners by the number of dorsal scale rows and ventral scales, a colour pattern that lacks pale stripes, and by having a very small tail shield with four or three prominent spines. Based on lack of records from similar habitats and elevations elsewhere in Sri Lanka, the new species likely has a very small range in the central highlands...
May 8, 2017: Zootaxa
https://www.readbyqxmd.com/read/28608464/evaluation-of-capillary-zone-electrophoresis-for-the-quality-control-of-complex-biologic-samples-application-to-snake-venoms
#17
André P S Kpaibe, Randa Ben-Ameur, Gaëlle Coussot, Yoann Ladner, Jérôme Montels, Michèle Ake, Catherine Perrin
Snake venoms constitute a very promising resource for the development of new medicines. They are mainly composed of very complex peptides and proteins mixtures, which composition may vary significantly from batch to batch. This latter consideration is a challenge for routine quality control (QC) in the pharmaceutical industry. In this article, we report the use capillary zone electrophoresis for the development of an analytical fingerprint methodology to assess the quality of snake venoms. The analytical fingerprint concept is being widely used for the QC of herbal drugs but rarely for venoms QC so far...
June 13, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28606819/cytotoxicity-of-cerastes-cerastes-snake-venom-involvement-of-imbalanced-redox-status
#18
Hayet Kebir-Chelghoum, Fatima Laraba-Djebari
Envenomation caused by Cerastes cerastes snake venom is characterized by a local and a systemic tissue damage due to myonecrosis, hemorrhage, edema and acute muscle damage. The present study aimed to evaluate the relationship between the pro/anti-oxidants status and the cytotoxicity of C. cerastes snake venom. The in vivo cytotoxicity analysis was undertaken by the injection of C. cerastes venom (48μg/20g body weight) by i.p. route, mice were then sacrificed at 3, 24 and 48h post injection, organs were collected for further analysis...
June 9, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28602829/comparison-of-proteomic-profiles-of-the-venoms-of-two-of-the-big-four-snakes-of-india-the-indian-cobra-naja-naja-and-the-common-krait-bungarus-caeruleus-and-analyses-of-their-toxins
#19
Manisha Choudhury, Ryan J R McCleary, Manish Kesherwani, R Manjunatha Kini, Devadasan Velmurugan
Snake venoms are mixtures of biologically-active proteins and peptides, and several studies have described the characteristics of some of these toxins. However, complete proteomic profiling of the venoms of many snake species has not yet been done. The Indian cobra (Naja naja) and common krait (Bungarus caeruleus) are elapid snake species that are among the 'Big Four' responsible for the majority of human snake envenomation cases in India. As understanding the composition and complexity of venoms is necessary for successful treatment of envenomation in humans, we utilized three different proteomic profiling approaches to characterize these venoms: i) one-dimensional SDS-PAGE coupled with in-gel tryptic digestion and electrospray tandem mass spectrometry (ESI-LC-MS/MS) of individual protein bands; ii) in-solution tryptic digestion of crude venoms coupled with ESI-LC-MS/MS; and iii) separation by gel-filtration chromatography coupled with tryptic digestion and ESI-LC-MS/MS of separated fractions...
June 8, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28602828/individual-variability-of-venom-from-the-european-adder-vipera-berus-berus-from-one-locality-in-eastern-hungary
#20
Tamás Malina, László Krecsák, Alexander Westerström, Gábor Szemán-Nagy, Gyöngyi Gyémánt, Márta M-Hamvas, Edward G Rowan, Alan L Harvey, David A Warrell, Balázs Pál, Zoltán Rusznák, Gábor Vasas
We have revealed intra-population variability among venom samples from several individual European adders (Vipera berus berus) within a defined population in Eastern Hungary. Individual differences in venom pattern were noticed, both gender-specific and age-related, by one-dimensional electrophoresis. Gelatin zymography demonstrated that these individual venoms have different degradation profiles indicating varying protease activity in the specimens from adders of different ages and genders. Some specimens shared a conserved region of substrate degradation, while others had lower or extremely low protease activity...
June 8, 2017: Toxicon: Official Journal of the International Society on Toxinology
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