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Snake envenomation

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https://www.readbyqxmd.com/read/27904261/the-north-south-divide-in-snake-bite-envenomation-in-india
#1
REVIEW
Vivek Chauhan, Suman Thakur
Snake bite envenomations are common in rural areas and the incidence peaks during monsoons in India. Prominent venomous species have been traditionally labeled as the 'big four' that includes Cobra, Krait, Russel's viper and Saw scaled viper. Systematic attempts for identification and classification of prevalent snakes in various states of India are missing till now and there is no concrete data on this aspect. The published literature however shows that some species of snakes are more prevalent in a particular region than the other parts of India e...
October 2016: Journal of Emergencies, Trauma, and Shock
https://www.readbyqxmd.com/read/27903075/australian-taipan-oxyuranus-spp-envenoming-clinical-effects-and-potential-benefits-of-early-antivenom-therapy-australian-snakebite-project-asp-25
#2
Christopher I Johnston, Nicole M Ryan, Margaret A O'Leary, Simon G A Brown, Geoffrey K Isbister
CONTEXT: Taipans (Oxyuranus spp.) are medically important venomous snakes from Australia and Papua New Guinea. The objective of this study was to describe taipan envenoming in Australian and its response to antivenom. METHODS: Confirmed taipan bites were recruited from the Australian Snakebite Project. Data were collected prospectively on all snakebites, including patient demographics, bite circumstances, clinical effects, laboratory results, complications and treatment...
November 30, 2016: Clinical Toxicology
https://www.readbyqxmd.com/read/27902669/an-anaphylactoid-reaction-to-rattlesnake-envenomation-in-a-pediatric-patient
#3
Logan Rencher, Joanna Schwartz, Alexandra Wilson
Rattlesnake envenomation causes a spectrum of symptoms and signs, many of which closely resemble an anaphylactic reaction. Development of airway compromise after a snake bite to an extremity is unusual, but has been previously reported. The majority of such reports detail a history of probable sensitization from previous contact with snakes or snake venom. Few reports exist without such previous contact; no reports are of pediatric cases. Here we present a 14-year-old boy with no history of prior snake exposure who presents with an anaphylactoid reaction after a rattlesnake bite...
November 29, 2016: Pediatric Emergency Care
https://www.readbyqxmd.com/read/27890774/inhibition-of-local-effects-induced-by-bothrops-erythromelas-snake-venom-assessment-of-the-effectiveness-of-brazilian-polyvalent-bothropic-antivenom-and-aqueous-leaf-extract-of-jatropha-gossypiifolia
#4
Juliana Félix-Silva, Jacyra A S Gomes, Jacinthia B Xavier-Santos, Júlia G R Passos, Arnóbio A Silva-Junior, Denise V Tambourgi, Matheus F Fernandes-Pedrosa
Bothrops erythromelas is a snake of medical importance responsible for most of the venomous incidents in Northeastern Brazil. However, this species is not included in the pool of venoms that are used in the Brazilian polyvalent bothropic antivenom (BAv) production. Furthermore, it is well known that antivenom therapy has limited efficacy against venom-induced local effects, making the search for complementary alternatives to treat snakebites an important task. Jatropha gossypiifolia is a medicinal plant widely indicated in folk medicine as an antidote for snakebites, whose effectiveness against Bothrops jararaca venom (BjV) has been previously demonstrated in mice...
November 25, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27888371/protective-effect-of-the-sulfated-agaran-isolated-from-the-red-seaweed-laurencia-aldingensis-against-toxic-effects-of-the-venom-of-the-snake-lachesis-muta
#5
Ana Cláudia Rodrigues da Silva, Luciana Garcia Ferreira, Maria Eugênia Rabello Duarte, Mutue Toyota Fujii, Eladio Flores Sanchez, Miguel Daniel Noseda, André Lopes Fuly
Snakebite is a serious occupational hazard affecting mainly rural populations of tropical and subtropical developing countries. Lachesis muta (Bushmaster) bites are extremely serious but are rarely reported in the literature. Bushmaster envenomings are characterized by intense local pain, edema, neurotoxicity, hypotension, local hemorrhage, and dramatic systemic alterations. Antivenom treatment has regularly been used for more than a century; however, it fails to neutralize local tissue damage and hemorrhage, leading to morbidity or disabilities in victims...
November 25, 2016: Marine Biotechnology
https://www.readbyqxmd.com/read/27886134/priority-actions-and-progress-to-substantially-and-sustainably-reduce-the-mortality-morbidity-and-socioeconomic-burden-of-tropical-snakebite
#6
Robert A Harrison, José María Gutiérrez
The deliberations and conclusions of a Hinxton Retreat convened in September 2015, entitled "Mechanisms to reverse the public health neglect of snakebite victims" are reported. The participants recommended that the following priority actions be included in strategies to reduce the global impact of snake envenoming: (a) collection of accurate global snakebite incidence, mortality and morbidity data to underpin advocacy efforts and help design public health campaigns; (b) promotion of (i) public education prevention campaigns; (ii) transport systems to improve access to hospitals and (iii) establishment of regional antivenom-efficacy testing facilities to ensure antivenoms' effectiveness and safety;...
November 24, 2016: Toxins
https://www.readbyqxmd.com/read/27876196/clinically-significant-envenomation-from-postmortem-copperhead-agkistrodon-contortrix
#7
Michael P Emswiler, F Phillip Griffith, Kirk L Cumpston
Over 14,000 copperhead (Agkistrodon contortrix) bites were reported to United States poison centers between 1983 and 2008, and 1809 cases were reported to poison centers in 2014. The copperhead is primarily found in the southeastern United States and belongs to the pit viper subfamily Crotalinae, which also includes the water moccasin (Agkistrodon piscivorus) and rattlesnakes (Crotalus and Sistrurus genera). Postmortem rattlesnakes have been reported to cause clinically significant envenomation; we report a case of a postmortem copperhead causing clinically significant envenomation after inadvertent puncture with the deceased copperhead fang...
November 18, 2016: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/27871786/ischemic-brain-infarcts-and-intracranial-haemorrhages-following-russell-s-viper-daboia-russelii-bite-in-sri-lanka
#8
R M M K Namal Rathnayaka, S A M Kularatne, K D M Kumarasinghe, Janaka Ranaweera, P E A Nishanthi Ranathunga
Snakebite is an important medical problem in Sri Lanka. Of the deadly venomous snakes, Russell's viper (Daboia russelii) is widely distributed and responsible for most of the fatalities of snakebite in the country. It is not uncommon to see atypical manifestations in Russell's viper bite. We report the events of intracranial haemorrhages and multiple ischemic brain infarcts following Russell's viper (Daboia russelii) bite of a previously healthy 43-years-old male who succumbed to envenoming.
November 19, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27843867/ornament-induced-complications-in-snake-bites-revisiting-the-do-it-right-approach
#9
Subhendu Mallik, Sudipta Ranjan Singh, Sangeeta Sahoo, Manoj Kumar Mohanty
Limb adorning ornaments (LAO) can exacerbate the local effects of envenoming in case of venomous snake bite. Cultural presuppositions do inhibit victims from removing symbolically/ritually important jewelry even under circumstances that might increase the dangers of envenoming-induced gangrene formation. The recommendation to remove the LAO is usually skipped in guidelines and if at all included the very real hazard is uncommonly documented. We observed 14 cases of snake bite with LAO on the bitten limb with minimal to severe local complications...
April 2016: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/27824133/high-throughput-immuno-profiling-of-mamba-dendroaspis-venom-toxin-epitopes-using-high-density-peptide-microarrays
#10
Mikael Engmark, Mikael R Andersen, Andreas H Laustsen, Jigar Patel, Eric Sullivan, Federico de Masi, Christian S Hansen, Jens V Kringelum, Bruno Lomonte, José María Gutiérrez, Ole Lund
Snakebite envenoming is a serious condition requiring medical attention and administration of antivenom. Current antivenoms are antibody preparations obtained from the plasma of animals immunised with whole venom(s) and contain antibodies against snake venom toxins, but also against other antigens. In order to better understand the molecular interactions between antivenom antibodies and epitopes on snake venom toxins, a high-throughput immuno-profiling study on all manually curated toxins from Dendroaspis species and selected African Naja species was performed based on custom-made high-density peptide microarrays displaying linear toxin fragments...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27814368/chronic-musculoskeletal-disabilities-following-snake-envenoming-in-sri-lanka-a-population-based-study
#11
Subashini Jayawardana, Ariaranee Gnanathasan, Carukshi Arambepola, Thashi Chang
BACKGROUND: Snakebite is a major public health problem in agricultural communities in the tropics leading to acute local and systemic impairments with resultant disabilities. Snakebite related long-term musculoskeletal disabilities have been a neglected area of research. We conducted a population-based, cross-sectional study in an agricultural community to describe the chronic musculoskeletal disabilities of snake envenoming. METHODOLOGY/PRINCIPAL FINDINGS: A sample representative of residents of a single district in a region of high incidence of snake envenoming was recruited to identify ever snakebite victims...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27806970/snake-bite-mortality-in-children-beyond-bite-to-needle-time
#12
M P Jayakrishnan, M G Geeta, P Krishnakumar, T V Rajesh, Biju George
OBJECTIVE: To study the clinical characteristics and predictors of mortality from snake bite envenomation in children. DESIGN: Prospective observational study with a one-group cohort design. SETTING: Paediatric intensive care unit of a tertiary care hospital in South India. SUBJECTS: The study cohort consisted of 145 children (55 girls and 90 boys) <12 years of age with snake bite envenomation. METHODS: Demographic and clinical details were recorded in a semistructured pro forma...
November 2, 2016: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/27799796/snake-venom-causes-apoptosis-by-increasing-the-reactive-oxygen-species-in-colorectal-and-breast-cancer-cell-lines
#13
Abdulrahman Khazim Al-Asmari, Anvarbatcha Riyasdeen, Mohammad Hamed Al-Shahrani, Mozaffarul Islam
Snake venom possesses various kinds of proteins and neurotoxic polypeptides, which can negatively interfere with the neurotransmitter signaling cascade. This phenomenon occurs mainly due to the blocking of ion channels in the body system. Envenomation prevents or severely interrupts nerve impulses from being transmitted, inhibition of adenosine triphosphate synthesis, and proper functioning of the cardiac muscles. However, some beneficial properties of venoms have also been reported. The aim of this study was to examine the snake venom as an anticancer agent due to its inhibitory effects on cancer progression such as cell motility, cell invasion, and colony formation...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27782073/a-comprehensive-view-of-the-structural-and-functional-alterations-of-extracellular-matrix-by-snake-venom-metalloproteinases-svmps-novel-perspectives-on-the-pathophysiology-of-envenoming
#14
REVIEW
José María Gutiérrez, Teresa Escalante, Alexandra Rucavado, Cristina Herrera, Jay W Fox
Snake venom metalloproteinases (SVMPs) affect the extracellular matrix (ECM) in multiple and complex ways. Previously, the combination of various methodological platforms, including electron microscopy, histochemistry, immunohistochemistry, and Western blot, has allowed a partial understanding of such complex pathology. In recent years, the proteomics analysis of exudates collected in the vicinity of tissues affected by SVMPs has provided novel and exciting information on SVMP-induced ECM alterations. The presence of fragments of an array of ECM proteins, including those of the basement membrane, has revealed a complex pathological scenario caused by the direct action of SVMPs...
October 22, 2016: Toxins
https://www.readbyqxmd.com/read/27775063/the-effect-of-physiological-levels-of-south-african-puff-adder-bitis-arietans-snake-venom-on-blood-cells-an-in-vitro-model
#15
Morné A Strydom, Janette Bester, Sthembile Mbotwe, Etheresia Pretorius
A significant burden of illness is caused globally by snakebites particularly by the puff adder, Bitis arietans. Presently there is no reliable and rapid method to confirm envenomation on blood chemistry; although coagulation parameters like prothrombin time, partial thromboplastin time, international normalized ratio and also serum electrolytes are tested. Here, we found that direct in vitro exposure of physiological relevant whole venom levels to human healthy blood (N = 32), caused significant physiological changes to platelet activity using a hematology analyzer, and measuring occlusion time, as well as lyses time, with the global thrombosis test (GTT)...
October 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27763551/the-snake-with-the-scorpion-s-sting-novel-three-finger-toxin-sodium-channel-activators-from-the-venom-of-the-long-glanded-blue-coral-snake-calliophis-bivirgatus
#16
Daryl C Yang, Jennifer R Deuis, Daniel Dashevsky, James Dobson, Timothy N W Jackson, Andreas Brust, Bing Xie, Ivan Koludarov, Jordan Debono, Iwan Hendrikx, Wayne C Hodgson, Peter Josh, Amanda Nouwens, Gregory J Baillie, Timothy J C Bruxner, Paul F Alewood, Kelvin Kok Peng Lim, Nathaniel Frank, Irina Vetter, Bryan G Fry
Millions of years of evolution have fine-tuned the ability of venom peptides to rapidly incapacitate both prey and potential predators. Toxicofera reptiles are characterized by serous-secreting mandibular or maxillary glands with heightened levels of protein expression. These glands are the core anatomical components of the toxicoferan venom system, which exists in myriad points along an evolutionary continuum. Neofunctionalisation of toxins is facilitated by positive selection at functional hotspots on the ancestral protein and venom proteins have undergone dynamic diversification in helodermatid and varanid lizards as well as advanced snakes...
October 18, 2016: Toxins
https://www.readbyqxmd.com/read/27762105/clinical-profile-and-laboratory-parameters-in-1051-victims-of-snakebite-from-a-single-centre-in-kerala-south-india
#17
J C Menon, J K Joseph, M P Jose, B L Dhananjaya, O V Oommen
INTRODUCTION: Snakebite is an occupational hazard causing considerable morbidity and mortality worldwide, particularly so in tropical countries like India. OBJECTIVE: The aim of this study is to (i) review the demographic, clinical and laboratory findings in patients (1051) admitted with venomous snakebite (ii) to correlate mortality, morbidity and duration of hospital stay with clinical signs, symptoms and laboratory parameters. METHODS: A retrospective study of 1051 patients treated for snakebite over 10 years (2000 - 2009) in Little Flower Hospital, Angamaly, Kerala...
August 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27752613/does-the-traditional-snakebite-severity-score-correctly-classify-envenomated-patients
#18
Seungho Kang, Jeongmi Moon, Byeongjo Chun
OBJECTIVE: This study aims to help set domestic guidelines for administration of antivenom to envenomated patients after snakebites. METHODS: This retrospective observational case series comprised 128 patients with snake envenomation. The patients were divided into two groups according to the need for additional antivenom after the initial treatment based on the traditional snakebite severity grading scale. One group successfully recovered after the initial treatment and did not need any additional antivenom (n=85) and the other needed an additional administration of antivenom (n=43)...
March 2016: Clinical and Experimental Emergency Medicine
https://www.readbyqxmd.com/read/27752013/transient-distal-renal-tubular-acidosis-following-hump-nosed-viper-bite-two-cases-from-sri-lanka
#19
Ranga M Weerakkody, Pushpa N Lokuliyana, Ruchika D Lanerolle
Hump-nosed viper (Hypnale hypnale; HNV) is one of the six major snake species in Sri Lanka that cause envenomation. Nephrotoxicity, coagulopathy, and neurotoxicity are wellrecognized features of its envenomation. Type 4 renal tubular acidosis (RTA4) has only once been described previously in this condition, and we report two further cases. Two patients aged 53 and 51 presented following HNV bites with acute kidney injury and microangiopathic hemolytic anemia. Both underwent multiple cycles of hemodialysis until the polyuric phase was reached...
September 2016: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/27749012/injury-trends-from-envenoming-in-australia-2000-2013
#20
Ronelle E Welton, David J Williams, Danny Liew
BACKGROUND: This study provides the first contemporary epidemiological insight into venomous injuries based on demographics and geography in Australia in the timeframe 2000-2013. METHODS: Analysis of national hospitalisation and mortality data to examine the incidence of injury and death due to envenoming in Australia. Rates were calculated using the intercensal population for all Australian age groups. RESULTS: Over the study period, deaths were due to an anaphylactic event (0...
October 17, 2016: Internal Medicine Journal
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