COMPETITION BETWEEN SALMONELLA AND PSEUDOMONAS SPECIES GROWING IN ANDON AGAR, AS AFFECTED BY PH, SODIUM-CHLORIDE CONCENTRATION AND TEMPERATURE

pH/sodium chloride (NaCl) gradient plates were used to investigate com petition between Pseudomonas and Salmonella species. At 30 degrees C a nd at particular NaCl/pH conditions the salmonellae inhibited growth o f 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 mi xed strains in agar plates with the pH/NaCl conditions was compared by viable counts. Competition in pour plates at 30 degrees C was confirm ed. At 20 degrees C, sub-surface growth of the salmonellae inhibited t he P. putida. With surface growth this did not occur; the salmonellae was slightly inhibited by the P. putida.