Figure 6.

Number of bacterial cells engulfed in a polymorphonuclear leukocyte (PMNL). Under transmission electron microscopy (TEM), 30 PMNLs were arbitrarily selected, and the number of bacterial cells engulfed in each cell was counted. The results show the average number and standard deviation for the number of bacterial cells engulfed in each PMNL. Statistical difference to Prevotella intermedia ATCC 25611 was determined using unpaired t-test with the significance set at P < 0.05 (*).

Yamanaka et al. BMC Infectious Diseases 2011 11:228   doi:10.1186/1471-2334-11-228
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