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Toxins 2019, 11(3), 168; https://doi.org/10.3390/toxins11030168

Daboia (Vipera) palaestinae Envenomation in 123 Horses: Treatment and Efficacy of Antivenom Administration

1
Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
2
Ministry of Health Central Laboratories, Jerusalem 9134302, Israel
*
Author to whom correspondence should be addressed.
Received: 2 February 2019 / Revised: 12 March 2019 / Accepted: 12 March 2019 / Published: 19 March 2019
(This article belongs to the Section Animal Venoms)
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Abstract

Envenomation by venomous snakes is life threatening for horses. However, the efficacy of available treatments for this occurrence, in horses, has not yet been adequately determined. The aim of this study was to describe the treatments provided in cases of Daboia palaestinae envenomation in horses and to evaluate the safety and efficacy of antivenom administration. Data regarding 123 equine snakebite cases were collected over four years from 25 veterinarians. The majority of horses were treated with procaine-penicillin (92.7%), non-steroidal anti-inflammatory drugs (82.3%), dexamethasone (81.4%), tetanus toxoid (91.1%) and antivenom (65.3%). The time interval between treatment and either cessation or 50% reduction of local swelling was linearly associated with case fatality (p < 0.001). The overall mortality rate was 20.3%. Treatment with procaine-penicillin was significantly associated with reduced mortality (OR = 0.11). Three horse-derived antivenom products were available during the study period, of which the horses were administered different brands of varying dosages. Administration of the recommended dosage of any of the aforementioned products led to a significant decrease in mortality (p = 0.014), even in severe cases (scoring 2 or greater on the equine snakebite severity scale). No adverse reactions were reported. The results of this study show that species-specific D. palaestinae antivenom administered at the manufacturer-recommended dosage is effective in significantly reducing mortality in cases of envenomation in horses. View Full-Text
Keywords: Vipera palaestinae; Daboia palaestinae; envenomation; snakebite; horse; antivenom Vipera palaestinae; Daboia palaestinae; envenomation; snakebite; horse; antivenom
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Tirosh-Levy, S.; Solomovich-Manor, R.; Comte, J.; Nissan, I.; Sutton, G.A.; Gabay, A.; Gazit, E.; Steinman, A. Daboia (Vipera) palaestinae Envenomation in 123 Horses: Treatment and Efficacy of Antivenom Administration. Toxins 2019, 11, 168.

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