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https://www.readbyqxmd.com/read/29021149/the-envenomation-of-general-physiology-throughout-the-last-century
#1
Jon T Sack
Toxins are the poisonous products of organisms. Toxins serve vital defensive and offensive functions for those that harbor them: stinging scorpions, pesticidal plants, sanguinary snakes, fearless frogs, sliming snails, noxious newts, and smarting spiders. For physiologists, toxins are integral chemical tools that hijack life's fundamental processes with remarkable molecular specificity. Our understanding of electrophysiological phenomena has been transformed time and time again with the help of some terrifying toxins...
November 6, 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/28988729/allergic-reactions-to-antivenom-in-a-patient-bitten-twice-by-the-same-snake-within-a-month-a-rare-case-report-and-literature-review
#2
Fan-Jie Zeng, Cong Chen, Ming-Hua Liu
Antivenom is the most effective method currently available for the treatment of poisonous snake bite. Allergic reactions to antivenom have been reported in the past. Here we shared a case of allergic reactions to antivenom in an old male patient who was bitten twice by the same snake (probably same one) at the same biting site within a month whereas the patient did not show any allergic disorder in the first bitten. Envenomations twice in a short period time by the same kind of snake are very rare. Physician should be alert to the occurrence of allergic reactions in treating this type of patients with antivenom...
July 13, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28937812/predator-perspective-drives-geographic-variation-in-frequency-dependent-polymorphism
#3
Iris A Holmes, Maggie R Grundler, Alison R Davis Rabosky
Color polymorphism in natural populations can manifest as a striking patchwork of phenotypes in space, with neighboring populations characterized by dramatic differences in morph composition. These geographic mosaics can be challenging to explain in the absence of localized selection because they are unlikely to result from simple isolation-by-distance or clinal variation in selective regimes. To identify processes that can lead to the formation of geographic mosaics, we developed a simulation-based model to explore the influence of predator perspective, selection, migration, and genetic linkage of color loci on allele frequencies in polymorphic populations over space and time...
October 2017: American Naturalist
https://www.readbyqxmd.com/read/28828281/genomic-evidence-of-bitter-taste-in-snakes-and-phylogenetic-analysis-of-bitter-taste-receptor-genes-in-reptiles
#4
Huaming Zhong, Shuai Shang, Xiaoyang Wu, Jun Chen, Wanchao Zhu, Jiakuo Yan, Haotian Li, Honghai Zhang
As nontraditional model organisms with extreme physiological and morphological phenotypes, snakes are believed to possess an inferior taste system. However, the bitter taste sensation is essential to distinguish the nutritious and poisonous food resources and the genomic evidence of bitter taste in snakes is largely scarce. To explore the genetic basis of the bitter taste of snakes and characterize the evolution of bitter taste receptor genes (Tas2rs) in reptiles, we identified Tas2r genes in 19 genomes (species) corresponding to three orders of non-avian reptiles...
2017: PeerJ
https://www.readbyqxmd.com/read/28790503/mast-cells-and-ige-can-enhance-survival-during-innate-and-acquired-host-responses-to-venoms
#5
Stephen J Galli, Philipp Starkl, Thomas Marichal, Mindy Tsai
Mast cells and immunoglobulin E (IgE) antibodies are thought to promote health by contributing to host responses to certain parasites, but other beneficial functions have remained obscure. Venoms provoke innate inflammatory responses and pathology reflecting the activities of the contained toxins. Venoms also can induce allergic sensitization and development of venom-specific IgE antibodies, which can predispose some subjects to exhibit anaphylaxis upon subsequent exposure to the relevant venom. We found that innate functions of mast cells, including degradation of venom toxins by mast cell-derived proteases, enhanced survival in mice injected with venoms from the honeybee, two species of scorpion, three species of poisonous snakes, or the Gila monster...
2017: Transactions of the American Clinical and Climatological Association
https://www.readbyqxmd.com/read/28755953/kidney-toxicity-related-to-herbs-and-dietary-supplements-online-table-of-case-reports-part-3-of-5-series
#6
REVIEW
Amy Christine Brown
BACKGROUND: No tabular summary of potentially life-threatening, kidney-toxic dietary supplements (DS; includes herbs) based on PubMed case reports is currently available online and continually updated to forewarn United States consumers, clinicians, and companies manufacturing DS. The purpose of this review was to create an online research summary table of kidney toxicity case reports related to DS. METHODS: Documented PubMed case reports (1966 to May 2016, and cross-referencing) of DS appearing to contribute to kidney toxicity were listed in "DS Toxic Tables...
September 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28683119/the-socio-economic-burden-of-snakebite-in-sri-lanka
#7
Anuradhani Kasturiratne, Arunasalam Pathmeswaran, A Rajitha Wickremasinghe, Shaluka F Jayamanne, Andrew Dawson, Geoff K Isbister, Hithanadura Janaka de Silva, David G Lalloo
BACKGROUND: Snakebite is a major problem affecting the rural poor in many of the poorest countries in the tropics. However, the scale of the socio-economic burden has rarely been studied. We undertook a comprehensive assessment of the burden in Sri Lanka. METHODS: Data from a representative nation-wide community based household survey were used to estimate the number of bites and deaths nationally, and household and out of pocket costs were derived from household questionnaires...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28657429/safety-profile-of-snake-antivenom-use-in-hong-kong-a-review-of-191-cases-from-2008-to-2015
#8
Rupeng Mong, Vember C H Ng, Man Li Tse
INTRODUCTION: The mainstay of treatment for significant envenoming from snakebites is antivenom. However, there is insufficient data regarding the safety of antivenom used in Hong Kong. We describe the incidence of hypersensitivity reactions from antivenom use and review the frequency and reasons for intensive care unit (ICU) admission. METHODS: The Hong Kong Poisons Information Centre database was reviewed. All patients given snake antivenom between 2008 and 2015 were included...
June 28, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28623383/ethnopharmacological-uses-phytochemistry-biological-activities-and-biotechnological-applications-of-eclipta-prostrata
#9
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...
July 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28549866/venom-of-the-peruvian-snake-bothriopsis-oligolepis-detection-of-antibacterial-activity-and-involvement-of-proteolytic-enzymes-and-c-type-lectins-in-growth-inhibition-of-staphylococcus-aureus
#10
M A Sulca, C Remuzgo, J Cárdenas, S Kiyota, E Cheng, M P Bemquerer, M T Machini
There is a rising interest in snake venoms proteins (SVPs) because these macromolecules are related to pharmacological properties that manifest themselves during poisoning and can lead to secondary microbial infections. Interestingly, researchers have somehow neglected the antimicrobial activity of SVPs. The aims of this study were: (i) to verify whether the venom of the Peruvian snake Bothriopsis oligolepis displays such activity; (ii) to isolate and identify some of its antimicrobial constituents. Liquid growth inhibition assays revealed that the crude venom inhibited the growth of Gram-positive and Gram-negative bacteria, but not of Candida species...
May 23, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28542227/health-beliefs-of-school-age-rural-children-in-podoconiosis-affected-families-a-qualitative-study-in-southern-ethiopia
#11
Abebayehu Tora, Getnet Tadele, Abraham Aseffa, Colleen M McBride, Gail Davey
BACKGROUND: Several studies have suggested investigation of health beliefs in children to be an important pre-condition for primary prevention of disease. However, little effort has been made to understand these in the context of podoconiosis. This study therefore aimed to explore the health beliefs of school-age rural children in podoconiosis-affected families. METHODOLOGY/PRINCIPAL FINDINGS: A cross sectional qualitative study was conducted in March 2016 in Wolaita Zone, Southern Ethiopia...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28540206/acute-kidney-injury-from-different-poisonous-substances
#12
Rubina Naqvi
AIM: To report our experience of acute kidney injury (AKI) developed after exposure to poisonous substance. METHODS: Retrospective study where data was collected from case records of patients coming to this institute during January 1990 to May 2016. This institution is a tertiary care center for renal care in the metropolitan city of Karachi, Pakistan. History of ingested substance, symptoms on presentation, basic laboratory tests on arrival, mode of treatment and outcome were recorded from all patients and are presented here...
May 6, 2017: World Journal of Nephrology
https://www.readbyqxmd.com/read/28444737/digest-know-your-poison-predictable-molecular-changes-confer-toxin-resistance-in-snakes
#13
Kalina T J Davies
No abstract text is available yet for this article.
June 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28349771/antivenom-for-european-vipera-species-envenoming
#14
REVIEW
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/28300747/pathophysiology-of-dilatation-of-pupils-due-to-scorpion-and-snake-envenomation-and-its-therapeutic-value-clinical-observations
#15
Himmatrao S Bawaskar, Parag H Bawaskar, Pramodini H Bawaskar
Dilated nonreacting pupils are routinely taken as a sign of irreversible brain damage. Alpha-receptor stimulation (scorpion sting) and presynaptic acetylcholine receptor blocker (krait bite) may result in dilation of pupils without involvement of the brain. This study was aimed to clinically evaluate the response of pupils in scorpion sting and krait bite. Victims of scorpion sting and krait bite were chosen from Raigad district. Scorpion sting and krait bite cases were admitted to hospital and were clinically evaluated in detail regarding neurological manifestations...
January 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28178774/a-retrospective-review-of-rattlesnake-bites-in-100-children
#16
Norberto Sotelo-Cruz, Norberto Gómez-Rivera
BACKGROUND: A retrospective review of clinical features and treatment of children hospitalized for rattlesnake bite. METHODS: One hundred clinical records were reviewed. Variables included: age, gender, season of the year, signs, symptoms, poisoning grade, complications, treatment and sequelae. RESULTS: Fifty-nine percent were males and 37% were less than 5 years of age; 87% occurred in rural areas; 63% of the snakebites occurred during the summer, of them, 39% occurred within the perimeter of the domicile and 8% within the home...
April 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28109304/traditional-use-and-perception-of-snakes-by-the-nahuas-from-cuetzalan-del-progreso-puebla-mexico
#17
Romina García-López, Alejandro Villegas, Noé Pacheco-Coronel, Graciela Gómez-Álvarez
BACKGROUND: Indigenous cultures are the result of their adaptation to the natural surroundings, in such a way that, amongst their main features is a set of knowledge, technologies and strategies for the appropriation of nature. In Cuetzalan del Progreso, Puebla, Mexico snakes represent 71.1% of the total local herpetofauna; and in addition to this, different groups of Nahuas have shown to have information of their use of various snake species in many ways. This study was conducted to investigate the traditional uses of snakes in this cultural group...
January 21, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28056960/availability-of-essential-medicines-in-selected-public-primary-and-secondary-health-care-institutions-of-a-rural-sri-lankan-district-a-spot-survey
#18
Devarajan Rathish, Indika Premarathna, Thiwanka Jayathilake, Chathurika Kandegedara, Kalani Punchihewa, Lakmali Ananda, Thejani Bandara, Channa Jayasumana, Sisira Siribaddana
BACKGROUND: Assessment of the availability of essential medicines, in rural areas of countries with free state health care system, is scarce. Dependence on essential medicines among the population in rural sector is considered to be high. Assessing the availability of essential medicines in selected state owned primary and secondary health care institutions of a rural district will help to identify areas where improvement is needed. METHODS: A descriptive cross sectional study, covering selected five primary and one secondary care institutions of a rural Sri Lankan district, was conducted...
January 5, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/27994383/acute-carbolic-acid-poisoning-a-report-of-four-cases
#19
Prabhas Prasun Giri, Rajiv Sinha, Shalini Sikka, Saumen Meur
Phenol (carbolic acid) is one of the oldest antiseptic agents. Apart from being used in many commercially available products, in rural India, it is often used in the household to prevent snake infestation. We hereby present four cases of acute carbolic acid poisoning which we saw over the last monsoon. The cases highlight the multiple routes of absorption of carbolic acid as well as its multi-organ complications which often necessitate intensive care of local therapy decreases systemic phenol absorption from cutaneous exposure and may help in reducing severity...
November 2016: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/27940763/childhood-victims-of-snakebites-2000-2013
#20
Joann Schulte, Kristina Domanski, Eric Anthony Smith, Annelle Menendez, Kurt C Kleinschmidt, Brett A Roth
BACKGROUND: Snakebites are not a reportable condition (to state health departments), and 1 major assessment of US children with snakebites was published 50 years ago. Increasing urbanization, population shifts south and west, newer antivenom therapy, and the importation of exotic snakes may have changed snakebites. Poison control centers are often consulted on treatment and collect surveillance data. METHODS: Generic codes for venomous, nonvenomous, and unknown snakebites were used to characterize victims aged ≤18 years reported to US poison control centers between 2000 and 2013...
November 2016: Pediatrics
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