Indian scorpions collected in Karnataka: maintenance in captivity, venom extraction and toxicity studies

摘要

class="Heading">Background id="Par1" class="Para">Maintenance of scorpions under laboratory conditions is ideal for long-term venom collection to explore the therapeutic applications of scorpion venom. Collection of venom by electrical stimulation requires a reliable stimulator and effective restrainer. Thus, the present study was conducted to develop a convenient method to maintain scorpions and to extract their venom for toxicity studies via a modified restrainer and stimulator. class="Heading">Methods id="Par2" class="Para">Four different scorpion species were collected, among which three species were maintained in the laboratory in containers that mimic their natural habitat. Venom was extracted from Hottentotta rugiscutis by electrical stimulation at 8??V for 18??months and LD₅₀ was estimated by the graphic method of Miller and Tainter. class="Heading">Results id="Par3" class="Para">A total of 373 scorpions including Hottentotta rugiscutis, Hottentotta tamulus, Lychas tricarinatus and Heterometrus swammerdami were collected, identified and maintained successfully, achieving a 97??% survival rate. Hottentotta rugiscutis yielded 6.0??mL of venom by electrical stimulation. The LD₅₀ of H. rugiscutis venom was estimated to be 3.02??mg/kg of body weight in female Swiss albino mice. class="Heading">Conclusions id="Par4" class="Para">Scorpions were successfully maintained for 18??months. Herein we have also documented a simple, cost-effective method of venom extraction by electrical stimulation using a modified restrainer. Furthermore, Hottentotta rugiscutis was reported for the first time in Karnataka.