Distinct pathophysiological mechanisms of Heterometrus laoticus and Lychas mucronatus scorpion venoms on cardiovascular and renal functions

Posted by
  Distinct pathophysiological mechanisms of Heterometrus laoticus and Lychas mucronatus scorpion venoms on cardiovascular and renal functions Abstract Background:    Heterometrus laoticus and Lychas mucronatus are widely distributed in Southeast Asia, yet their pathophysiological effects of both venoms remain poorly characterized due to low human fatality rates. This study compared their venom compositions and acute cardiovascular and renal effects. Methods:   Anesthetized male New Zealand White rabbits were monitored for blood pressure (BP), heart rate (HR), and renal clearance following intravenous administration of crude venom (0.5 mg/kg). Venom components were identified via LC-MS/MS, and hematological/biochemical parameters were assessed. Results:    H. laoticus venom induced a rapid, transient hypotension ( p < 0.05), followed by a mild, prolonged hypotensive phase (up to 120 min). Conversely, L. mucronatus venom elicited a biphasic response: ...

First report of the brown widow spider, Latrodectus geometricus Koch, 1841 (Araneae, Theridiidae) from southern India

Posted by

 


First report of the brown widow spider, Latrodectus geometricus Koch, 1841 (Araneae, Theridiidae) from southern India

Abstract
Latrodectus geometricus (Koch, 1841) is a widow spider native to Africa and introduced in to several countries from both the Americas to Japan. Three adult female L. geometricus with three egg-sacs were observed in Nagercoil, Kanniyakumari district, Tamil Nadu. The present record extends its known distributional range to further south being the southernmost occurrence of the species in India.

R., Kishore & Sadhasivan, Vinod. (2025). First report of the brown widow spider, Latrodectus geometricus Koch, 1841 (Araneae, Theridiidae) from southern India. ENTOMON. 50. 465-468. 

ResearchGate: ResearchGate