FIG. 4.
ROIs produced by blue gourami phagocytes infected with various strains of E. tarda. Results were expressed as the mean ± SEM from quadruplicate experiments. Data represented by bars with asterisks differ significantly from results obtained with live E. tarda PPD130/91 (P < 0.05). L, live bacteria; D, heat-killed bacteria; Control, without any bacteria. P1, 153, 348, 387, and 392 are TnphoA mutants of E. tarda PPD130/91.