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The hematological and biochemical profiles of newly weaned rats submitted to experimental poisoning with T. serrulatus venom were evaluated. Fifteen recently weaned male Wistar rats (mean weight 130g) were distributed into three equal groups (n = 5). Animals in the control group (group A) received a subcutaneous injection of 400&#956;L of ultra-pure water, while those in the experimental groups received, by identical route, 400&#956;L of a solution containing 100&#956;g (group B) or 450&#956;g (group C) of scorpion venom dissolved in ultra-pure water. Red blood cells indexes, and differential leukocyte and total platelet counts were determined, together with levels of serum glucose, urea, creatinine, lactic dehydrogenase, aspartate aminotransferase, amylase, insulin, and cortisol. No significant differences between the control and experimental groups regarding red blood cells indexes were found. In contrast, significant increases (P<0.05) in neutrophils, lymphocytes, and monocytes were observed in animals from groups B and C compared with the control group, while the number of platelets decreased. Serum glucose concentration remained unchanged in all groups, but important alterations were observed in the values of urea and creatinine. The results show that scorpion venom was detrimental to renal function as demonstrated by the altered urea and creatinine levels. Pancreatic function was also impaired, as revealed by the increase in amylase activity and the reduction in insulin levels. Avaliaram-se os perfis hematológico e bioquímico de ratos recém-desmamados submetidos ao envenenamento experimental com veneno de Tityus serrulatus. Quinze ratos Wistar machos, média de peso de 130g, foram distribuídos aleatoriamente em três grupos (n = 5). Os animais do grupo-controle A foram inoculados com 400&#956;L de água ultrapura, os do grupo experimental B receberam 400&#956;L de uma solução contendo 100&#956;g de veneno e os do grupo experimental C receberam 400&#956;L de uma solução contendo 450&#956;g de veneno. Foram determinados os índices da série vermelha, a contagem total e diferencial dos leucócitos e a contagem total de plaquetas, bem como os níveis da desidrogenase lática, aspartato aminotransferase, amilase, glicose, ureia, creatinina, cortisol e insulina. Não houve diferenças significativas entre o grupo-controle e os experimentais com relação aos índices da série vermelha. Foram observados aumentos significativos (P<0,05) no número de neutrófilos, linfócitos e monócitos nos ratos dos grupos B e C, enquanto o número de plaquetas diminuiu. A concentração de glicose permaneceu inalterada em todos os grupos, mas foram observadas importantes alterações nos valores séricos de ureia e creatinina. Esses resultados mostraram que o veneno de escorpião comprometeu o funcionamento dos rins. Como demonstrado pelo aumento da atividade da amilase sérica e a redução dos níveis de insulina, a função pancreática também foi afetada

Hematological and biochemical profiles of rats submitted to experimental poisoning with Tityus serrulatus venom