PMN and monocyte expression of (a) FcγRI, (b) FcγRIIa, (c) FcγRIII, (d) CR3 and (e) mCD14 for Aa-Pg- subjects (open bars, n = 18), Aa+ subjects (bright grey bars, n = 9), Pg+ subjects (dark grey bars, n = 7), and Aa+Pg+ subjects (closed bars, n = 3). Values are means ± standard deviation; Aa (A. actinomycetemcomitans), Pg (P. gingivalis). aOn panel (a), monocytes: P = 0·005 for the overall anova; Aa+ subjects have lower monocytic FcγRI than Pg+ (post hoc P = 0·004). bOn panel (b), monocytes: P = 0·015 for the overall anova; Aa+ subjects have lower monocytic FcγRIIa than Pg+ (post hoc P = 0·009).