Crotalus venom toxins

Crotalus venom toxins are a complex mixture of bioactive proteins and peptides produced by rattlesnakes, which function primarily to immobilize prey and initiate digestion (StatPearls, NBK431065). The venom contains several major classes of toxins, including phospholipases A2 (PLA2), snake venom metalloproteinases (SVMP), and snake venom serine proteases (SVSP), which contribute to local tissue destruction, systemic coagulopathy, and neurotoxicity (PubMed, 30193164). In medical practice, these toxins are the therapeutic targets for antivenoms such as Crotalidae Polyvalent Immune Fab (CroFab) and Crotalidae Immune F(ab')2 (Anavip), which contain antibodies that bind and neutralize the venom components (FDA, CroFab Label). The clinical presentation of envenomation varies by species, with some venoms being primarily hemotoxic, causing hemorrhage and thrombocytopenia, while others, like those containing crotoxin, are potently neurotoxic (UniProt, P01392). Management of envenomation involves the administration of these antivenoms to prevent the progression of systemic toxicity and to manage complications like venom-induced consumptive coagulopathy.

Other names

Rattlesnake venomCrotalid venomCrotalinae toxins

Antivenom antibodies bind to the antigenic sites of the venom toxins, forming immune complexes that neutralize the toxin's enzymatic or toxic activity and facilitate its removal from the circulation (StatPearls, NBK431065).