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https://www.readbyqxmd.com/read/28534833/coagulating-colubrids-evolutionary-pathophysiological-and-biodiscovery-implications-of-venom-variations-between-boomslang-dispholidus-typus-and-twig-snake-thelotornis-mossambicanus
#1
Jordan Debono, James Dobson, Nicholas R Casewell, Anthony Romilio, Bin Li, Nyoman Kurniawan, Karine Mardon, Vera Weisbecker, Amanda Nouwens, Hang Fai Kwok, Bryan G Fry
Venoms can deleteriously affect any physiological system reachable by the bloodstream, including directly interfering with the coagulation cascade. Such coagulopathic toxins may be anticoagulants or procoagulants. Snake venoms are unique in their use of procoagulant toxins for predatory purposes. The boomslang (Dispholidus typus) and the twig snakes (Thelotornis species) are iconic African snakes belonging to the family Colubridae. Both species produce strikingly similar lethal procoagulant pathologies. Despite these similarities, antivenom is only produced for treating bites by D...
May 19, 2017: Toxins
https://www.readbyqxmd.com/read/28507562/antivenomics-as-a-tool-to-improve-the-neutralizing-capacity-of-the-crotalic-antivenom-a-study-with-crotamine
#2
Ricardo Teixeira-Araújo, Patrícia Castanheira, Leonora Brazil-Más, Francisco Pontes, Moema Leitão de Araújo, Maria Lucia Machado Alves, Russolina Benedeta Zingali, Carlos Correa-Netto
BACKGROUND: Snakebite treatment requires administration of an appropriate antivenom that should contain antibodies capable of neutralizing the venom. To achieve this goal, antivenom production must start from a suitable immunization protocol and proper venom mixtures. In Brazil, antivenom against South American rattlesnake (Crotalus durissus terrificus) bites is produced by public institutions based on the guidelines defined by the regulatory agency of the Brazilian Ministry of Health, ANVISA...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28487791/a-horned-viper-bite-victim-with-pres
#3
Ahmed Mustafa Ibrahim, Tarek Talaat ElSefi, Maha Ghanem, Akram Muhammad Fayed, Nesreen Adel Shaban
Neurological complications of snake bites have been well documented in the literature as neuromuscular paralysis and cerebrovascular complications; posterior reversible encephalopathy syndrome was rarely described. A 23-year-old lady presented near full term of her pregnancy with a horned snake Cerastes cerastes bite; after successful delivery she started complaining of altered mental status and visual disturbance with ulceration over the site of the snake bite. On admission, the patient had Glasgow Coma Score of 12, blood pressure 130/80 mmHg, temperature 38°C, sinus tachycardia at 120 beats per minute, severe dehydration, and reduction in visual acuity to "hand motion" in both eyes with poor light projection and sluggish pupillary reactions...
2017: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/28476572/venomics-of-bungarus-caeruleus-indian-krait-comparable-venom-profiles-variable-immunoreactivities-among-specimens-from-sri-lanka-india-and-pakistan
#4
Angeline Mei Feng Oh, Choo Hock Tan, Gnanathasan Christeine Ariaranee, Naeem Quraishi, Nget Hong Tan
The Indian krait (Bungarus caeruleus) is one of the "Big Four" venomous snakes widely distributed in South Asia. The present venomic study reveals that its venom (Sri Lankan origin) is predominated by phospholipases A2 (68.2% of total proteins), in which at least 8.3% are presynaptically-acting β-bungarotoxins. Three-finger toxins (19.0%) are the second most abundant, comprising 15.6% κ-neurotoxins, the potent postsynaptically-acting long neurotoxins. Comparative chromatography showed that venom samples from Sri Lanka, India and Pakistan did not exhibit significant variation...
May 2, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28462021/differential-transcript-profile-of-inhibitors-with-potential-anti-venom-role-in-the-liver-of-juvenile-and-adult-bothrops-jararaca-snake
#5
Cícera Maria Gomes, Karen de Morais-Zani, Stephen Lu, Diego de Souza Buarque, Glória Regina Cardoso Braz, Kathleen Fernandes Grego, Aparecida Sadae Tanaka, Anita Mitico Tanaka-Azevedo
BACKGROUND: Snakes belonging to the Bothrops genus are vastly distributed in Central and South America and are responsible for most cases of reported snake bites in Latin America. The clinical manifestations of the envenomation caused by this genus are due to three major activities-proteolytic, hemorrhagic and coagulant-mediated by metalloproteinases, serine proteinases, phospholipases A2 and other toxic compounds present in snake venom. Interestingly, it was observed that snakes are resistant to the toxic effects of its own and other snake's venoms...
2017: PeerJ
https://www.readbyqxmd.com/read/28461874/epidemiological-study-of-snakebites-in-ardabil-province-iran
#6
Esmaeil Farzaneh, Nasrin Fouladi, Yousef Shafaee, Zahra Mirzamohammadi, Farnaz Naslseraji, Omid Mehrpour
INTRODUCTION: Average annual incidence of snakebite worldwide is between 5.5 to 1.2 million, and at least 125,000 of them are fatal. In Iran, around 4,500-11,000 snakebites occur annually, and a small number of them are fatal. Snake bites can cause intoxity and immediate death in patients, and the aim of this study was to investigate the epidemiological study of snakebites in Ardabil Province. METHODS: This study was a cross-sectional that has been done on 67 snakebite patients who were admitted to the Imam Khomeini Hospital of Ardabil during 2008-2013...
March 2017: Electronic Physician
https://www.readbyqxmd.com/read/28456535/-dry-bite-in-venomous-snakes-a-review
#7
REVIEW
B Sadananda Naik
It is quite interesting that when a venomous snake bites a person and the victim does not suffer from any signs or symptoms of envenomation. A good percentage of venomous snake bites in humans do occur without venom injection. This phenomenon is termed as "Dry" bite in clinical medicine. Though this was not very uncommon in toxicological practice but, our awareness of this problem has increased. In this article an effort has been made to provide an insight into the incidence, pathophysiology and patho-mechanics of this unique medical enigma...
April 27, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28450682/clinical-serum-therapy-benefits-cautions-and-potential-applications
#8
Toru Hifumi, Akihiko Yamamoto, Manabu Ato, Kyoko Sawabe, Kazunori Morokuma, Nobuya Morine, Yutaka Kondo, Eiichiro Noda, Atsushi Sakai, Jin Takahashi, Kazuo Umezawa
Blood serum from immunized humans or animals (e.g., horses) contains relevant antibodies and has been used as serum therapy to treat many diseases or envenomation events. The effectiveness of blood serum was initially discovered in 1890 when Kitasato and von Behring observed the effectiveness of this type of therapy against diphtheria and tetanus. Serum therapies played an important role in the advancement of modern medicine prior to the development of penicillin and steroids. At present, several types of serum therapy remain in clinical use...
April 28, 2017: Keio Journal of Medicine
https://www.readbyqxmd.com/read/28443568/the-compartment-syndrome-associated-with-deep-vein-thrombosis-due-to-rattlesnake-bite-a-case-report
#9
Radu Ciprian Tincu, Zoie Ghiorghiu, Dana Tomescu, Radu Alexandru Macovei
BACKGROUND: Snakebite is a health issue specific to some parts of the world, especially in the tropical area, where it produces many victims. The main clinical damage caused by snake bite involves hemotoxic, neurotoxic and myotoxic reactions. It is also established that the importance of systemic impairment varies according to individual factors and are related to organ dysfunction, shock or hypotension. We report the case of a young woman suffering from snakebite who developed deep vein thrombosis and compartment syndrome...
April 13, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28443375/human-fatalities-caused-by-animal-attacks-a-six-year-autopsy-study
#10
Nilesh Keshav Tumram, Vipul N Ambade, Pradeep G Dixit
Deaths caused by animal attacks in urban as well as rural areas are rising. With dwindling forest cover and with more interaction of animals with humans in day-to-day life, we need to understand the reasons, manner and causes of these fatal events. We studied 151 cases of fatal animal/human conflicts and in particular, the manner and mechanism of causation of injuries with respect to different types of animals. In this region there were more fatal snake bites followed by cattle attacks. Humans are at some risk while in the vicinity of animals whether in the wild or in human settlements...
January 1, 2017: Medico-legal Journal
https://www.readbyqxmd.com/read/28425175/haemorrhagic-snake-venom-metalloproteases-and-human-adams-cleave-lrp5-6-which-disrupts-cell-cell-adhesions-in-vitro-and-induces-haemorrhage-in-vivo
#11
Tadahiko Seo, Taketo Sakon, Shiori Nakazawa, Asuka Nishioka, Kohei Watanabe, Kaori Matsumoto, Mari Akasaka, Narumi Shioi, Hitoshi Sawada, Satohiko Araki
Snake venom metalloproteases (SVMPs) are members of the a disintegrin and metalloprotease (ADAM) family of proteins, as they possess similar domains. SVMPs are known to elicit snake venom-induced haemorrhage; however, the target proteins and cleavage sites are not known. In this work, we identified a target protein of vascular apoptosis-inducing protein 1 (VAP1), an SVMP, relevant to its ability to induce haemorrhage. VAP1 disrupted cell-cell adhesions by relocating VE-cadherin and γ-catenin from the cell-cell junction to the cytosol, without inducing proteolysis of VE-cadherin...
April 20, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28421973/-bitten-by-an-exotic-venomous-snake
#12
M A Dijkman, I de Vries, M van Dam, D W de Lange
BACKGROUND: Patients who have been bitten by an exotic venomous snake are at risk of severe morbidity and a fatal outcome following an incorrect risk-assessment. Treatment with an antivenom can be necessary and can turn out to be lifesaving. In the Netherlands there are only a few cases of bites from exotic venomous snakes each year. CASE DESCRIPTION: A 28-year-old man presented at the emergency department (ED) after having been bitten by a monocled cobra (Naja kaouthia)...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28411932/arthropod-envenomation-in-north-america
#13
REVIEW
Timothy B Erickson, Navneet Cheema
Arthropods (phylum Arthopoda) account for a higher percentage of morbidity and mortality to humans than do mammalian bites, snake bites, or marine envenomation. They are ubiquitous in domestic dwellings, caves, and campsites and in wilderness settings such as deserts, forests, and lakes. Although arthropods are most intrusive during warmer months, many are active throughout the winter, particularly indoors. Arthropods are also nocturnal and often bite unsuspecting victims while they are sleeping. Encounters with humans are generally defensive, accidental, or reactive...
May 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/28411931/north-american-snake-envenomation
#14
REVIEW
Bryan Corbett, Richard F Clark
Native US snakes that produce clinically significant envenomation can be divided into 2 groups, crotalids and elapids. The crotalids include rattlesnakes, cottonmouths, and copperheads. Crotalid envenomation can result in significant local tissue damage as well as thrombocytopenia and coagulopathy. Rarely are bites fatal. Native US elapids are all coral snakes that possess neurotoxic venom that can cause weakness, respiratory paralysis, and rarely death. Treatment of both types of envenomation revolves around general supportive care and antivenom administration when indicated...
May 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/28411930/marine-envenomation
#15
REVIEW
Kirsten B Hornbeak, Paul S Auerbach
Venomous aquatic animals are hazardous to swimmers, surfers, divers, and fishermen. Exposures include mild stings, bites, abrasions, and lacerations. Severe envenomations can be life threatening. This article reviews common marine envenomations, exploring causative species, clinical presentation, and current treatment recommendations. Recommendations are included for cnidaria, sponges, bristle worms, crown-of-thorns starfish, sea urchins, venomous fish, stingrays, cone snails, stonefish, blue-ringed octopus, and sea snakes...
May 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/28400263/peptidomimetic-hydroxamate-metalloproteinase-inhibitors-abrogate-local-and-systemic-toxicity-induced-by-echis-ocellatus-saw-scaled-snake-venom
#16
Ana Silvia Arias, Alexandra Rucavado, José María Gutiérrez
The ability of two peptidomimetic hydroxamate metalloproteinase inhibitors, Batimastat and Marimastat, to abrogate toxic and proteinase activities of the venom of Echis ocellatus from Cameroon and Ghana was assessed. Since this venom largely relies for its toxicity on the action of zinc-dependent metalloproteinases (SVMPs), the hypothesis was raised that toxicity could be largely eliminated by using SVMP inhibitors. Both hydroxamate molecules inhibited local and pulmonary hemorrhagic, in vitro coagulant, defibrinogenating, and proteinase activities of the venoms in conditions in which venom and inhibitors were incubated prior to the test...
June 15, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28396683/preparation-and-neutralization-efficacy-of-igy-antibodies-raised-against-deinagkistrodon-acutus-venom
#17
Jinhua Liu, Qiyi He, Wenwen Wang, Bin Zhou, Bo Li, Yingfeng Zhang, Cong Luo, Diancheng Chen, Jia Tang, Xiaodong Yu
BACKGROUND: The five-paced pit viper (Deinagkistrodon acutus), endemic to China and northern Vietnam, is responsible for most snakebites in the Chinese territory. Antivenom produced from horses is the main treatment for snakebites, but it may cause numerous clinical side effects and have other disadvantages involved in their production such as the welfare of animals. The present study was conducted aiming to develop an alternative antibody (IgY) from the egg yolk of leghorn chickens immunized with snake venom...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28356675/thrombotic-microangiopathy-due-to-viperidae-bite-two-case-reports
#18
T Dineshkumar, J Dhanapriya, R Sakthirajan, K Thirumalvalavan, A A Kurien, T Balasubramaniyan, N Gopalakrishnan
Snake bite is mainly an occupational hazard and causes serious health problems in rural India. Acute kidney injury (AKI) occurs in 5-30% cases. Renal pathologic findings include acute tubular necrosis, cortical necrosis, interstitial nephritis, glomerulonephritis, and vasculitis. Thrombotic microangiopathy (TMA) occurrence after a snake bite is reported rarely. Here, we present two patients who developed TMA after viper bite treated with hemodialysis and plasmapheresis. Renal biopsy showed fibrin thrombi in glomeruli and arterioles with cortical necrosis...
March 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28349771/antivenom-for-european-vipera-species-envenoming
#19
Thomas Lamb, Luc de Haro, Davide Lonati, Miran Brvar, Michael Eddleston
BACKGROUND: European viper bite is relatively uncommon but can cause serious envenoming, particularly swelling and hemorrhage spreading from limb to trunk that can cause long term disability. Systemic features are relatively mild compared to many other venomous species. Moderate-to-severe envenoming requires antivenom, which is given many hundreds of times each year across the continent. Several Vipera spp antivenoms are produced in Europe, but there is little comparative information available for the antivenoms and none is licensed with the European Medicines Agency...
July 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28347832/the-genus-achyranthes-a-review-on-traditional-uses-phytochemistry-and-pharmacological-activities
#20
REVIEW
Xirui He, Xiaoxiao Wang, Jiacheng Fang, Yu Chang, Ning Ning, Hao Guo, Linhong Huang, Xiaoqiang Huang
ETHNOPHARMACOLOGICAL RELEVANCE: Achyranthes L. (Amaranthaceae), also known as Chaff Flower and Niuxi/, mainly includes two famous medicinal species namely A. bidentata and A. aspera. A. bidentata has been widely used as blood-activating and stasis-resolving medicine for the treatment of various diseases including amenorrhea, dysmenorrhea, lumbago, gonalgia, paraplegia, edema, stranguria, headache, dizziness, odontalgia, oral ulcer, hematemesis, and epistaxis. A. aspera has been widely used to treat various diseases, including gynecological disorder, asthma, ophthalmia, odontalgia, haemorrhoids, and abdominal tumor, and has been applied to difficult labour, wound healing, insect and snake bites...
May 5, 2017: Journal of Ethnopharmacology
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