FIG. 6.

Effect of chlorine. Overnight cultures were washed twice by centrifugation and resuspended in cold sterile water before exposure to chlorine (24). (A) The longer-term survival of three strains of B. pseudomallei (diamonds, NCTC 13177; squares, NCTC10276; and triangles, BCC11) with exposure to 1 ppm chlorine in water. (B) Survival of B. pseudomallei NCTC 13177 with no prior (⧫) and prior (•) exposure to 100 ppm chlorine in water after subsequent exposure to 1 ppm chlorine. Error bars indicate standard errors of the means (24).