Zeinsteger, P. a. creator Maruñak, Silvana L. Acosta de Pérez, Ofelia C. text ag 2007 continuing eng 3 páginas Resumen: Tests of neutralization of hemorrhagic and edema.forming activities from the venom of Bothrops alternatus (vibora de la cruz) one month.old offsprings were performed using a bivalent antivenom, produced by Laboratorio Central de Salud Publica in La Plata, Buenos Aires, Argentina. We determined that 172 - Êl of the antivenom neutralize 50 % of the hemorrhagic activity, induced by 9 - Êg of the venom (challenge dose). Neutralization of edema.forming activity was more effective when the antivenom was administered previous to the venom. We conclude that the antivenom neutralizes the studied toxic activities, taking into account that for its production horses are immunized using venom from adult snakes. Bothrops Alternatus Vibora de la Cruz Edema Hemorragia Argentina 1668-4834 217547 v. 10/11 n. 1-2 (2000) AR-ReUNN 260630 20260702002307.0 217853 spa