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Kumar R, Rathore AS. Snakebite Management: The Need of Reassessment, International Relations, and Effective Economic Measures to Reduce the Considerable SBE Burden. J Epidemiol Glob Health 2024:10.1007/s44197-024-00247-z. [PMID: 38856820 DOI: 10.1007/s44197-024-00247-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 05/20/2024] [Indexed: 06/11/2024] Open
Abstract
The sole treatment for snakebite envenomation (SBE), the anti-snake venom (ASV), suffers from considerable drawbacks, including side effects and limited species specificity. Additionally, despite its existence for more than a century, uniform availability of good quality ASV does not yet exist. The present review describes the journey of a SBE victim and highlights the global crisis of SBE management. A detailed analysis of the current ASV market has also been presented along with the worldwide snake distribution. The current production of country specific licensed ASV throughout the globe along with their manufacturers has been examined at the snake species level. Furthermore, a detailed analysis of on-ground situation of SBE management in antivenom manufacturing countries has been done using the most recent literature. Additionally, the export and import of different ASVs have been discussed in terms of procurement policies of individual countries, their shortcomings, along with the possible solution at the species level. It is interesting to note that in most countries, the existence of ASV is really either neglected or overstated, implying that it is there but unsuitable for use, or that it is not present but can be obtained from other countries. This highlights the urgent need of significant reassessment and international collaborations not just for development and production, but also for procurement, distribution, availability, and awareness. A PROMISE (Practical ROutes for Managing Indigenous Snakebite Envenoming) approach has also been introduced, offering simple, economical, and easy to adopt steps to efficiently alleviate the worldwide SBE burden.
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Affiliation(s)
- Ramesh Kumar
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
| | - Anurag S Rathore
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India.
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Vonberg FW, Blain PG. Neurotoxicology: a clinical systems-based review. Pract Neurol 2024:pn-2023-003983. [PMID: 38849205 DOI: 10.1136/pn-2023-003983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2024] [Indexed: 06/09/2024]
Abstract
Neurological disease caused by toxins is widespread but under-recognised. Despite increasing public interest and a growing number of novel potential neurotoxins, diagnosis of neurotoxic disease is often delayed or missed, resulting in poorer patient outcomes. This article discusses neurotoxic syndromes using a systems-based approach, focusing on environmental and occupational agents. We do not discuss recreational drugs, pharmaceutical agents or developmental neurotoxins in detail. We aim to provide neurologists with a working understanding of the scenarios in which a clinical presentation may be due to a neurotoxin and how to approach confirmation of the diagnosis.
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Affiliation(s)
| | - Peter G Blain
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
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Solano G, Cunningham S, Edge RJ, Duran G, Sanchez A, Villalta M, Clare RH, Wilkinson MC, Marriott AE, Abada C, Menzies SK, Keen M, Lalloo DG, Stienstra Y, Abouyannis M, Casewell NR, León G, Ainsworth S. African polyvalent antivenom can maintain pharmacological stability and ability to neutralise murine venom lethality for decades post-expiry: evidence for increasing antivenom shelf life to aid in alleviating chronic shortages. BMJ Glob Health 2024; 9:e014813. [PMID: 38485142 PMCID: PMC10941113 DOI: 10.1136/bmjgh-2023-014813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 02/25/2024] [Indexed: 03/17/2024] Open
Abstract
INTRODUCTION Antivenom is a lifesaving medicine for treating snakebite envenoming, yet there has been a crisis in antivenom supply for many decades. Despite this, substantial quantities of antivenom stocks expire before use. This study has investigated whether expired antivenoms retain preclinical quality and efficacy, with the rationale that they could be used in emergency situations when in-date antivenom is unavailable. METHODS Using WHO guidelines and industry test requirements, we examined the in vitro stability and murine in vivo efficacy of eight batches of the sub-Saharan African antivenom, South African Institute for Medical Research polyvalent, that had expired at various times over a period of 30 years. RESULTS We demonstrate modest declines in immunochemical stability, with antivenoms older than 25 years having high levels of turbidity. In vitro preclinical analysis demonstrated all expired antivenoms retained immunological recognition of venom antigens and the ability to inhibit key toxin families. All expired antivenoms retained comparable in vivo preclinical efficacy in preventing the lethal effects of envenoming in mice versus three regionally and medically important venoms. CONCLUSIONS This study provides strong rationale for stakeholders, including manufacturers, regulators and health authorities, to explore the use of expired antivenom more broadly, to aid in alleviating critical shortages in antivenom supply in the short term and the extension of antivenom shelf life in the longer term.
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Affiliation(s)
- Gabriela Solano
- Instituto Clodomiro Picado, Universidad de Costa Rica, San Jose, Costa Rica
| | | | - Rebecca J Edge
- Liverpool School of Tropical Medicine, Liverpool, UK
- Department of Infection Biology and Microbiomes, University of Liverpool, Liverpool, UK
| | - Gina Duran
- Instituto Clodomiro Picado, Universidad de Costa Rica, San Jose, Costa Rica
| | - Adriana Sanchez
- Instituto Clodomiro Picado, Universidad de Costa Rica, San Jose, Costa Rica
| | - Mauren Villalta
- Instituto Clodomiro Picado, Universidad de Costa Rica, San Jose, Costa Rica
| | | | | | - Amy E Marriott
- Liverpool School of Tropical Medicine, Liverpool, UK
- Department of Infection Biology and Microbiomes, University of Liverpool, Liverpool, UK
| | - Camille Abada
- Liverpool School of Tropical Medicine, Liverpool, UK
| | | | - Molly Keen
- Liverpool School of Tropical Medicine, Liverpool, UK
| | - David G Lalloo
- Liverpool School of Tropical Medicine, Liverpool, UK
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Blantyre, Malawi
| | - Ymkje Stienstra
- Liverpool School of Tropical Medicine, Liverpool, UK
- Department of Internal Medicine/Infectious Diseases, University of Groningen, Groningen, The Netherlands
| | | | | | - Guillermo León
- Instituto Clodomiro Picado, Universidad de Costa Rica, San Jose, Costa Rica
| | - Stuart Ainsworth
- Liverpool School of Tropical Medicine, Liverpool, UK
- Department of Infection Biology and Microbiomes, University of Liverpool, Liverpool, UK
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Tippett Barr BA, Brown G, Perry M, Ridzon R, Warrell DA. Sudden death after a bite by a lowland swamp viper (Proatheris superciliaris) in Malawi: Dying of fright? Toxicon 2023; 235:107324. [PMID: 37838003 DOI: 10.1016/j.toxicon.2023.107324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/05/2023] [Accepted: 10/11/2023] [Indexed: 10/16/2023]
Abstract
Proatheris superciliaris, the lowland swamp viper, has a limited distribution along lakeshores and rivers in Malawi, Southern Tanzania, and central Mozambique. Its venom is known to be procoagulant. Only five P. superciliaris bites have been reported, all inflicted by captive snakes, and none was fatal. Here we present a case of sudden death following a bite by Proatheris superciliaris in rural Malawi that cannot be attributed to envenoming. A healthy 32-year-old woman was planting rice in a flooded rice paddy field when she suddenly told her sister in a quiet voice that she had been bitten by a snake. She then collapsed face-upwards into the ankle-deep water. She remained motionless while her sister and uncle carried her out of the rice paddy onto dry land a few meters away. The victim did not regain consciousness. Her uncle heard one exhalation but no further breathing. The snake responsible was killed by a friend. Although the venom of this species can cause life-threatening coagulopathy, this woman's death occurred too rapidly to be attributable to envenoming. Only two explanations seem plausible: anaphylaxis, or vasovagal shock triggered by fear. In the present case, the victim died within minutes of the bite, closely observed by her anxious relatives, but showed no features of anaphylaxis. In Malawi, as in much of sub-Saharan Africa, many people are reportedly terrified of snakes, believing that bites by almost any species can cause rapid death. In this case, death occurred less than 2 min after a bite from Proatheris superciliaris. We believe that the cause of death was most likely a severe vasovagal attack, in response to the fear and pain of the snakebite that triggered vasodilatation, bradycardia, and hypotension leading to cardiac arrest.
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Affiliation(s)
| | | | - Mike Perry
- African Reptiles & Venom, Johannesburg, South Africa
| | - Renee Ridzon
- Nyanja Health Research Institute, PO Box 579, Salima, Malawi
| | - David A Warrell
- Nuffield Department of Clinical Medicine, University of Oxford, UK
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Aoki Y, Yoshimura K, Sakai A, Tachikawa A, Tsukamoto Y, Takahashi K, Yamano S, Smith C, Hayakawa K, Tasaki O, Ariyoshi K, Warrell DA. Exotic (non-native) snakebite envenomation in Japan: A review of the literature between 2000 and 2022. Toxicon 2023:107226. [PMID: 37442298 DOI: 10.1016/j.toxicon.2023.107226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/25/2023] [Accepted: 07/11/2023] [Indexed: 07/15/2023]
Abstract
A limited number of studies have investigated the clinical characteristics of snakebite envenomation by exotic (non-native) snakes in Japan. This study reviewed the literature to determine the status and risk of bites by exotic pet snakes in Japan. We reviewed reports of snakebite due to exotic snakes in Japan published between 2000 and 2022, excluding reports of bites by snakes native to Japan, such as Gloydius blomhoffii, Rhabdophis tigrinus, and Protobothrops flavoviridis. During the study period, 11 exotic snakebites were recorded, involving 11 species. The majority of those bitten (10/11 cases) were male, all cases were hand injuries, and there were no fatalities. The snakes responsible belonged to the Colubridae (4/11 cases), Viperidae (4/11 cases), and Elapidae (3/11 cases) families. Cases of envenomation by G. brevicaudus, Bungarus candidus, and Dendroaspis angusticeps were of particular interest. Ten of the eleven patients developed local cytotoxic signs, and three developed "compartment syndrome," in which the surgeons performed decompressive incisions. Two bites from elapid snakes and one from a viperid snake resulted in respiratory failure. Antivenom was given in two cases. Complications were observed, such as acute kidney injury, rhabdomyolysis, coagulopathy, and residual dysfunction of the affected finger. Emergency rooms should be prepared to manage patients who have been bitten by exotic snakes, even though the number of reported cases is not high in Japan. Initial stabilization of patients is crucial, before a definitive diagnosis is made, as with native snakebite envenomation. Finger bites are reported in most cases, which may result in functional impairment of the fingers. In order to collect more comprehensive patient data in Japan, a reporting system for all snakebite envenomations should be considered.
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Affiliation(s)
- Yoshihiro Aoki
- Coordination Office for Emergency Medicine and International Response, Acute and Critical Care Center, Nagasaki University Hospital, Nagasaki, Japan; School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan.
| | | | | | - Atsuko Tachikawa
- Department of Emergency Medicine, Nagasaki Harbor Medical Center, Nagasaki, Japan
| | - Yutaka Tsukamoto
- Department of Emergency Medicine, Nagasaki Harbor Medical Center, Nagasaki, Japan
| | - Kensuke Takahashi
- Coordination Office for Emergency Medicine and International Response, Acute and Critical Care Center, Nagasaki University Hospital, Nagasaki, Japan; School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan; Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Shuhei Yamano
- Coordination Office for Emergency Medicine and International Response, Acute and Critical Care Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Chris Smith
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan; Department of Clinical Research, London School of Hygiene and Tropical Medicine Faculty of Infectious and Tropical Diseases, London, UK
| | - Koichi Hayakawa
- Coordination Office for Emergency Medicine and International Response, Acute and Critical Care Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Osamu Tasaki
- Acute and Critical Care Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Koya Ariyoshi
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan; Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - David A Warrell
- Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
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Fortner R. The tale of snakebite's fleeting spotlight-and why it encapsulates all that's wrong with global health. BMJ 2023; 380:306. [PMID: 36849183 DOI: 10.1136/bmj.p306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
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Warwick C, Pilny A, Steedman C, Howell T, Martínez-Silvestre A, Cadenas V, Grant R. Mobile Zoos and Other Itinerant Animal Handling Events: Current Status and Recommendations for Future Policies. Animals (Basel) 2023; 13:214. [PMID: 36670754 PMCID: PMC9854913 DOI: 10.3390/ani13020214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/07/2022] [Accepted: 12/25/2022] [Indexed: 01/11/2023] Open
Abstract
Mobile zoos are events in which non-domesticated (exotic) and domesticated species are transported to venues such as schools, hospitals, parties, and community centres, for the purposes of education, entertainment, or social and therapeutic assistance. We conducted literature searches and surveyed related government agencies regarding existing provisions within laws and policies, number of mobile zoos, and formal guidance issued concerning operation of such events in 74 countries or regions. We also examined governmental and non-governmental guidance standards for mobile zoos, as well as websites for mobile zoo operations, assessed promotional or educational materials for scientific accuracy, and recorded the diversity of species in use. We used the EMODE (Easy, Moderate, Difficult, or Extreme) algorithm, to evaluate identified species associated with mobile zoos for their suitability for keeping. We recorded 14 areas of concern regarding animal biology and public health and safety, and 8 areas of false and misleading content in promotional or educational materials. We identified at least 341 species used for mobile zoos. Mobile zoos are largely unregulated, unmonitored, and uncontrolled, and appear to be increasing. Issues regarding poor animal welfare, public health and safety, and education raise several serious concerns. Using the precautionary principle when empirical evidence was not available, we advise that exotic species should not be used for mobile zoos and similar itinerant events.
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Affiliation(s)
- Clifford Warwick
- Emergent Disease Foundation, 71-75 Shelton Street, Covent Garden, London WC2H 9JQ, UK
| | - Anthony Pilny
- Arizona Exotic Animal Hospital, 2340 E Beardsley Road Ste 100, Phoenix, AZ 85024, USA
| | - Catrina Steedman
- Emergent Disease Foundation, 71-75 Shelton Street, Covent Garden, London WC2H 9JQ, UK
| | - Tiffani Howell
- School of Psychology and Public Health, La Trobe University, P.O. Box 199, Bendigo, VIC 3552, Australia
| | | | - Vanessa Cadenas
- Animal Protection Biodiversity & Environment Section, Government of Catalonia, 43004 Tarragona, Spain
| | - Rachel Grant
- School of Applied Sciences, London South Bank University, 103 Borough Rd, London SE1 0AA, UK
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Early Adverse Reactions to Snake Antivenom: Poison Center Data Analysis. Toxins (Basel) 2022; 14:toxins14100694. [PMID: 36287963 PMCID: PMC9608579 DOI: 10.3390/toxins14100694] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/19/2022] [Accepted: 09/27/2022] [Indexed: 11/05/2022] Open
Abstract
Antivenom is an essential treatment for snake envenomation; however, early adverse reactions (EARs) are major limitations to its use. We performed a retrospective cross-sectional study using Ramathibodi Poison Center data (January 2016 to December 2017) to clarify the incidence and severity of EARs following different F(ab’)2 antivenoms. Among 1006 envenomed patients, 684 (68%) received antivenom therapy with a total of 1157 doses, mostly green pit viper antivenom. The overall EAR incidence and rate were 22. 5% (154/684) and 15% (173/1157), respectively. The EAR rate following each type of antivenom was >10%, except for Russell’s viper antivenom (2.9%); the severe reaction rate was 2.6% (30/1157). Malayan pit viper bites caused a high incidence of EARs (37.8%) and the highest EAR rate (22.3%). Fifty-two cases developed anaphylaxis. All EARs occurred within 2 h after treatment initiation. No deaths were attributed to EARs. The duration of administration was significantly different between doses of antivenom that induced EARs and those that did not. In conclusion, all types and every dose of antivenom should be infused for 30−60 min. Preparation of resuscitation equipment and continuous clinical observation are crucial for at least 2 h after administration, and prompt treatment should be provided when EARs occur.
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Seven days in medicine: 20-26 July 2022. BMJ (CLINICAL RESEARCH ED.) 2022. [PMID: 35902112 DOI: 10.1136/bmj.o1854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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