Microbial counts of S1 (S. Derby), S2 (S. Typhimurium) and S3 (S. Meleagridis) after inoculation in meat extract broth (MEB) added to lactic acid or acetic acid and adjusted at different pH values, and incubated at 37 °C until 48 h. Controls obtained in MEB inoculated with the same cultures and pH 7.0, incubated at 37 °C until 48 h. Values in log CFU/mL