Thomas L V, Wimpenny J W
School of Pure and Applied Biology, University of Wales College of Cardiff, UK.
Int J Food Microbiol. 1996 Apr;29(2-3):361-70. doi: 10.1016/0168-1605(95)00077-1.
pH/sodium chloride (NaCl) gradient plates were used to investigate competition between Pseudomonas and Salmonella species. At 30 degrees C and at particular NaCl/pH conditions the salmonellae inhibited growth of P. fluorescens and not P. putida. At 20 degrees C P. putida and not P. fluorescens inhibited the salmonellae. The growth of the pure and mixed strains in agar plates with the pH/NaCl conditions was compared by viable counts. Competition in pour plates at 30 degrees C was confirmed. At 20 degrees C, sub-surface growth of the salmonellae inhibited the P. putida. With surface growth this did not occur; the salmonellae was slightly inhibited by the P. putida.
