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Table I-Antibiosis between various lactic cultures Strains of Pediococcus cerevisiae, Pediococcus acidilactici, Luctohucillus phnturum, Lactohacillus casei and Micrococcus variuns were studied with the aim of preparing mixed cultures of compatible strains for meat fermentations. Addition of 0.18% nitrite was slightly inhibitory while addition of 7% of a spice mix proved stimulatory. Antibiosis was observed between lactobacilli and pediococci. Micrococcus van'ons did not produce inhibitory substances toward other cultures and was insensitive to bacteriocins produced by the lactobacilli or the pcdiococci. Antibioscs observed using disk assays were confirmed in mixed acidification trials, and mixes of some fast-acidifying strains were unsuccessful. Target organism (in agar)Inhibitor organism (culture added to disc)