title: Modified Feist broth as a serum-free alternative for enhanced production of protective antigen of Erysipelothrix rhusiopathiae.
abstract: The production of protective antigen in modified serum-free nutrient broth (H. Feist, K.-D. Flossmann, and W. Erler, Arch. Exp. Veterinaermed. 30:49-57, 1976) and in brain heart infusion broth supplemented with 10% horse serum (BHIS) was evaluated for six strains of Erysipelothrix rhusiopathiae serotypes 1a, 2, 2b, 4, and N. All six strains grew to higher cell densities in modified Feist medium than in BHIS and produced larger amounts of 64,000- to 66,000- and 39,000- to 40,000-molecular-weight antigens involved in immunity to erysipelas. A vaccine produced in Feist medium from E. rhusiopathiae SE-9 (serotype 2) was highly effective in a mouse protection test. We therefore suggest that modified Feist medium is an excellent, if not superior, alternative to BHIS for production of erysipelas vaccine.
authors: Department of Microbiology, Immunology and Parasitology, New York State College of Veterinary Medicine, Cornell University, Ithaca 14853.
authors: M H
authors: MH
authors: Groschup
authors: J F
authors: JF
authors: Timoney
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000096:biosynthesis* / Q000302:isolation & purification; D001428:Bacterial Vaccines / Q000302:isolation & purification; D001431:Bacteriological Techniques; D003470:Culture Media; D004888:Erysipelothrix / Q000145:classification / Q000276:immunology*; D004889:Erysipelothrix Infections / Q000517:prevention & control; D051379:Mice; D008970:Molecular Weight; D012703:Serotyping
chemical_list: D000942:Antigens, Bacterial; D001428:Bacterial Vaccines; D003470:Culture Media