Data/hora: 10/06/2024 15:24:12

Provedor de dados: | 65
País: | Brazil
Título: | Duration of an induced resistance of sheep to acute poisoning by Crotalaria retusa seeds
Autores: | Maia,Lisanka Angelo; Pessoa,Clarice Ricardo de Macedo; Rodrigues,Angélica Fernandes; Colegate,Steven; Dantas,Antônio Flávio Medeiros; Medeiros,Rosane Maria Trindade; Riet-Correa,Franklin.
Data: | 2014-06-01
Ano: | 2014
Palavras-chave: | Crotalaria retusa; Dehydropyrrolizidine alkaloids; Monocrotaline; Sheep; Resistance to poisoning.
Resumo: | The aim of this study was to determine the duration of the resistance after the end of the ingestion of non-toxic doses of Crotalaria retusa seeds. Ten sheep were divided into 3 groups of 3 animals each and a control group with 1 sheep. To induce resistance, sheep in groups 1, 2 and 3 received 20 daily doses of 2g kg-1 of C. retusa seeds, followed by 7 daily doses of 4g kg-1. To determine the duration of resistance the sheep in groups 1, 2 and 3 were challenged orally, 3, 7 and 15 days, respectively, after receiving the last dose of 4g kg-1, with a single dose of 5g kg-1. Sheep of groups 1 and 2 did not develop overt signs of poisoning. Two sheep of group 3, challenged 15 days after the end of the resistance induction period, showed signs of acute poisoning and died. These results suggest that the induced resistance of sheep to acute poisoning by C. retusa seeds is of short duration, from 7 to 15 days.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000600017
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782014000600017
Formato: | text/html
Fonte: | Ciência Rural  v.44 n.6 2014
Fonte: | info:eu-repo/semantics/openAccess