Horses which are acutely affected and those aborting due to leptospirosis should be isolated for 14-16 weeks. After this time urine should be tested to determine whether the horse is shedding the organism. | Horses which are acutely affected and those aborting due to leptospirosis should be isolated for 14-16 weeks. After this time urine should be tested to determine whether the horse is shedding the organism. |