SUSTAIN III® Cattle Boluses are indicated for the treatment of the following diseases when caused by one or more of the following pathogenic organisms sensitive to sulfamethazine: Bacterial Pneumonia and Bovine Respiratory Disease Complex (Shipping Fever Complex) (Pasteurella spp.), Colibacillosis (Bacterial Scours) (E. coli), Necrotic Pododermatitis (Foot Rot), Calf Diphtheria (Fusobacterium necrophorum), Acute Metritis (Streptococcus spp.).