Efficacy of sodium iodide for prevention of respiratory disease in preweaned dairy calves.

Objective: To determine the pharmacokinetics of sodium iodide (NaI) following oral administration to preweaned dairy calves, and to assess the efficacy of NaI for prevention of bovine respiratory disease (BRD) in preweaned calves at a commercial calf-raising facility.

Animals: 434 healthy preweaned dairy calves.

Procedures: In the first of 2 experimental trials, each of 7 calves received NaI (20 mg/kg, PO) once.