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Prevalence of DHP toxicity and detection of Synergistes jonesii in ruminants consuming Leucaena leucocephala in eastern Indonesia

MICHAEL J. HALLIDAY, TANDA PANJAITAN, JACOB NULIK, DAHLANUDDIN, JAGADISH PADMANABHA, CHRIS S. MCSWEENEY, SULAIMAN DEPAMEDE, DEBORA KANA HAU, KURNIAWAN, MUHAMMAD FAUZAN, SUTARTHA, BAIQ TUTIK YULIANA, CHARLES PAKERENG, PUTRI ARA, DESSY LIUBANA, RESTI G. EDISON AND H. MAX SHELTON

Introduction
Leucaena leucocephala (leucaena) is a productive forage tree legume widely used in eastern Indonesia. While highly nutritious, it contains the toxin mimosine, which adversely affects animal production. In ruminants, mimosine is readily converted to the 2 isomers of dihydroxypyridine (3,4-DHP and 2,3-DHP) known to cause goitre, suppress appetite and cause severe mineral deficiencies. These adverse symptoms may be partially responsible for the reluctance of some farmers to feed leucaena. A bacterium capable of complete degradation of DHP, Synergistes jonesii, originally discovered in Ha-waii in goats consuming leucaena (Jones and Megarrity 1986), was later found in Indonesia, which led to the assumption that all Indonesian ruminants were protected from leucaena toxicity even on 100% leucaena diets. The objective of this study, conducted during Octo-ber-November 2011, was to test this hypothesis via an extensive survey of the toxicity status of ruminants consuming leucaena in eastern Indonesia. DOWNLOAD FILE PDF

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