TABLE 1.

E. tarda strains and their percentage of adherence to phagocytes

E. tarda strain	Inoculum (105)	Adherence at 25°Ca
		Viable count (%)b		Direct microscopic count (%)c
		Nonopsonized	Opsonized	Nonopsonized	Opsonized
PPD130/91	7.3 ± 1.3	8.8 ± 0.5 Aα	11.7 ± 0.8 Bα	10.9 ± 1.4 Aγ	14.4 ± 1.6 Aγ
AL9379	8.2 ± 1.3	22.9 ± 0.6 Cα	38.2 ± 5.2 Dβ	47.8 ± 2.0 Cγ	68.1 ± 3.1 BCδ
PPD76/87	6.4 ± 1.0	12.5 ± 0.6 Bα	0.02 ± 0.01 Aβ	37.7 ± 2.6 Bγ	78.9 ± 6.1 Cδ
PPD125/87	9.8 ± 1.5	33.0 ± 2.3 Dα	21.0 ± 1.6 Cβ	57.1 ± 1.9 Dγ	65.1 ± 0.7 Bδ

^aWithin each column, values followed by different letters (A, B, C, or D) are significantly different (P < 0.05). Similarly, within each row, values followed by different Greek letters (α and β for viable counts and γ and δ for direct counts) are significantly different (P < 0.05). 

^bThe viable count is the percentage of inoculum bacteria still adherent 30 min postinfection and after being washed three times. Values were recorded as the mean ± SEM for three trials in duplicate wells. 

^cThe direct microscopic count is the number of adherent bacteria (both live and dead) per 100 phagocytes 30 min postinfection. Values were recorded as the mean ± SEM for three trials in duplicate coverslips.