Estudos complementares sobre a toxidez de Lantana camara (Verbenaceae) em bovinos

Pesquisa Veterinária Brasileira

Carlos Hubinger Tokarnia²  Anibal Guillermo Armién¹  Severo Sales De Barros¹  Paulo Vargas Peixoto²  Jürgen Döbereiner¹ 

[1] ,Universidade Federal Rural do Rio de JaneiroSeropédica RJ

关键词: Poisonous plants;    plant poisoning;    photosensitization;    Lantana camara;    Verbenaceae;    pathology;    cattle;    Plantas tóxicas;    intoxicação por planta;    fotossensibilização;    Lantana camara;    Verbenaceae;    patologia;    bovinos;   

DOI  :  10.1590/S0100-736X1999000300007

来源: SciELO

【 摘 要 】

An outbreak of poisoning by Lantana camara var. aculeata in cattle was diagnosed in the county of Quatis, State of Rio de Janeiro. The animals, after travelling by foot, were put, hungry, for a few days, on a pasture highly infested by the plant. The toxicity of the plant was proved experimentally in cattle; also experiments to see how far the plant has cumulative properties, were performed. The plant caused lethal poisoning when given as a single dose of 40 g/kg; 20 g/kg caused severe poisoning, 10 g/kg slight or no poisoning and 5 g/kg failed to provoke symptoms. A lethal result was produced also when 10 g/kg per day was given over 4 days. The administration of 5 g/kg per day caused severe poisoning when fed over 5 days to two calves. The dose of 2.5 g/kg fed daily over 7 or 9 days also produced severe poisoning in two calves; in another calf, severe symptoms were produced only after feeding 2.5 g/kg per day for 19 days; still another calf showed no symptoms after 32 days of feeding 2,5 g/kg per day, although twice the lethal dose had been fed by this time. A dose of 1.25 g/kg per day over 34 days also failed to produce any symptoms.

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