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Colorado Serum Company was founded in 1923 and recently entered its fourth generation in family ownership. Specializing in the manufacture of quality USDA-licensed large animal biologicals, Colorado Serum Company’s product line includes Serum Antibodies, Bacterins, Toxoids, Bacterin-Toxoids, Antitoxins, Spore, and Modified Live vaccines.

Professional Biological Company specializes in the manufacture of quality USDA-licensed large animal biologics labeled for and sold exclusively to licensed veterinarians. Products include Brucella Abortus RB-51, Caprine Serum Fraction Immunomodulator, Clostridial Antitoxins & Toxoids, Clostridials with Tetanus, Tetanus Antitoxin & Toxoid, and Normal Equine Serum.

Colorado Serum Company’s Reagent Division manufactures a line of laboratory reagents, animal blood products (pooled or individual), and tissue culture serums. Custom services include antibody production in specific host animals, antigen protocols, custom bleeding and serum processing, collection of blood into non-typical additives, etc…