5% each) venoms ( Laing et al., 2004; Rojas et al., 2005; Theakston and Warrell, 1991). Besides neutralizing the most severe toxic effects induced by envenomation involving snakes from the antigenic pool, ( Laing et al., 2004; Rojas et al., 2005) the preclinical assessment of anti-venom’s efficacy against venoms from other medically important species would be useful in Latin America for improving anti-venom production ( Gutierrez et al., 2009). This work describes

the preclinical evaluation of the neutralizing capacity of PABA against lethality, hemorrhagic, proteolytic, and PLA2 effects of Bothrops andianus’ venom. B. andianus is a venomous snake found in the southern mountains of Peru and Bolivia and its venom is not included in PABA production. In Peru, B. andianus is found in the areas (departments) of Cuzco and Puno, at elevations of 1800–3300 m ( Ministério Selleck Enzalutamide de Salúd Peru, 2004). Its geographical distribution overlaps Machu Picchu area, a UNESCO World Heritage Site ( UNESCO, 2012), which is an important touristic attraction and receives more

than 600,000 tourists per year, increasing the risks of accidents involving this snake. In Peru, the snakes of genus Bothrops are responsible for 80% of accidents and approximately 6.5% of these accidents are registered in the Cuzco and Puno Departments ( Ministério RGFP966 de Salúd Peru, 2004). For the experiments, male and female Swiss mice (18–22 g) were maintained in

the Centro de Bioterismo of Instituto de Ciências Biológicas of Universidade Federal de Minas Gerais (UFMG), Brazil. All animals received water and food ad libitum under controlled environmental conditions. The experimental protocols were approved by the Ethics Committee in Animal Experimentation (CETEA/UFMG). PABA, crude venoms from B. andianus, and antigenic pool species were provided by INS. Venoms were kept at −20 °C and anti-venom at 4 °C temperature as indicated on their prescription. The protein content in crude venoms and anti-venoms were determined according to Bradford’s method (1976) using BSA (Sigma Chemicals) as standard. Lethality of B. andianus venom was assessed by the intra-peritoneal (i.p.) route. Groups Thiamine-diphosphate kinase of four mice were injected with increasing amounts of venom (34.6 μg–72 μg/mouse), dissolved in 0.5 ml of PBS–BSA 0.01% solution, pH 7.4. Twenty four hours later, deaths were counted and LD50 was calculated using Probit analysis (95% confidence) ( Finney, 1971). The hemorrhagic activity was assayed as described in Kondo et al. (1960) and modified by Gutierrez et al. (1985). Five different doses (3.72 μg; 5.2 μg; 7.29 μg; 10.2 μg; 14.28 μg) of crude venom were inoculated subcutaneously into dorsal shaved skin of mice in 0.