Table 2.

Expression of selected membrane receptors on unstimulated tear-film and blood PMNs. Values are reported as mean fluorescent intensities (MFI).

CD markers	Tear-film PMNs	Blood PMNs
CD11b	358 ± 79*	48 ± 22
CD16	28 ± 31*	841 ± 198
CD45	71 ± 14*	47 ± 17
CD55	154 ± 44*	55 ± 26
CD66b	297 ± 83*	35 ± 22

Results are presented as means ± SD from 12 participants collecting tear-film PMNs several times (n = 53) and 3 participants donating the blood PMNs (n = 6).

*Significantly different from blood PMNs (p < 0.001).