Spontaneous poisoning by Leucaena leucocephalai in a goat from Rio de Janeiro State, Brazil

Ciência Rural

Paulo Vargas Peixoto²  Ticiana Nascimento França¹  Bernardo Melo Cunha¹  Danielle Valadão Albernaz Mattos Tavares¹  Marilene Farias Brito¹ 

[1] ,Universidade Federal Rural do Rio de Janeiro Instituto de Zootecnia Departamento de Nutrição Animal e PastagensSeropédica RJ ,Brasil

关键词: Leucaena leucocephalai;    goat;    spontaneous poisoning;    mimosine;    3;    4-DHP;    Leucaena leucocephalai;    caprino;    intoxicação natural;    mimosina;    3;    4-DHP;   

DOI  :  10.1590/S0103-84782008000200044

来源: SciELO

【 摘 要 】

Poisoning of a goat by Leucaena leucocephalai (Leg. Mimosoideae) in the State of Rio de Janeiro, Brazil, is described. Fresh leaves of the plant were ingested as the animal's main meal for at least 4 months before it developed total alopecia. At necropsy the thyroid was moderately enlarged. Histological examination revealed a decrease in the number of hair follicles (empty or in telogenic phase), vacuolation of keratinocytes of the epidermis and hair follicles, and superficial and follicular hyperkeratosis. Myxedema was found between skeletal and cardiac muscles fibers, in the kidneys, and in the submucosa/muscular layer of the digestive tract. The thyroid follicles were enlarged and filled with copious amounts of colloid (colloidal goiter). Although L. leucocephala is common in several tropical regions, natural poisoning by this plant in goats seems to be rare. It is the first report about spontaneous poisoning in goats by L. leucocephala in Brazil.

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