Horses with subclinical infections or those in the carrier state are asymptomatic.
Horses with subclinical infections or those in the carrier state are asymptomatic.
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===Laboratory Tests==
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Culture of Leptospira is challenging but can be attempted from urine, blood and aqueous humour in antemortem diagnosis, or from liver, kidney, fetus or placenta in post mortem diagnosis.
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A MAT or ELISA opn serum is a more sensitive diagnostic method. Paired titres 4 weeks apart are optimal.