FIG. 3.

(A) Serum enhances Acanthamoeba phagocytosis with live E. coli K-12. Untreated acanthamoebae were used as 100% phagocytosis, and levels of phagocytosis in serum and/or inhibitor-treated acanthamoebae are shown as percent change. Serum exhibits a significant (*, P < 0.05) increase in Acanthamoeba phagocytosis. These results are representative of three independent experiments performed in triplicate. Bars represent standard errors. (B) Representative effects of serum on Acanthamoeba uptake of heat-killed, FITC-labeled E. coli. Note that serum enhanced Acanthamoeba uptake of FITC-labeled E. coli. Magnification, ×200.