Plasma l-indospicine and 3-nitropropionic acid in ponies fed creeping indigo: Comparison with results from an episode of presumptive creeping indigo toxicosis.

Background: Creeping indigo (Indigofera spicata) toxicosis is an emerging problem among horses in Florida and bordering states.

Objectives: To quantify the putative toxins l-indospicine (IND) and 3-nitropropionic acid (NPA) in creeping indigo collected from multiple sites and to measure plasma toxin concentrations in ponies fed creeping indigo and horses with presumptive creeping indigo toxicosis.

Study Design: Experimental descriptive study with descriptive observational field investigation.