Intoxicação aguda e abortos em cobaias pelas favas de Enterolobium contortisiliquum (Leg. Mimosoideae)

Abstract

The objective was to study the acute toxicity and the abortive properties of Enterolobium contortisiliquum pods in guinea pigs. Pods of E. contortisiliquum were administered orally to 4 groups of 3 guinea pigs each. Another group of 3 guinea-pigs was used as control. Group 1 and 2 were fed with one dose of 5 and 10g of pods for kg body weight, respectively. The guinea pigs of Group 3 and 4 received 10 and 15g/kg, respectively, divided into daily doses of 5g/kg. One guinea pig from Group 2 and one from Group 4 died 12 and 18 hours after the end of the administration. Gross lesions were hemorrhages of the stomach and of the large and small gut, enlarged liver, and dilated gall bladder. Histologically, the liver had severe vacuolation and necrosis of periportal hepatocytes. In another experiment a ration containing 4% of pods of E. contortisiliquum was fed to 2 groups of 4 guinea-pigs, 35 days after mating. Four of the 8 guinea pigs aborted 6-15 days after the beginning of ingestion. The other 4 guinea pigs were not pregnant. All guinea pigs were euthanized after abortion or at the end of the experiment. Histologically all animals had mild to severe periportal hemorrhagic necrosis. All fetuses had variable degree of autolysis. In 4 fetuses studied no significant histologic lesions were observed. The acute lesions observed in guinea-pigs are similar than those observed in the spontaneous poisoning by Enterolobium spp. in cattle. Similar lesions are observed in guinea-pigs poisoned experimentally with saponins from E. gummiferum. The results of the experiments in pregnant guinea pigs suggest that E. contortisiliquum can be used to study the abortive effect of its pods or its toxic compounds. © 2009 Colégio Brasileiro de Patologia Animal.