Figure 1From: Phenotypic, genomic, and transcriptional characterization of Streptococcus pneumoniae interacting with human pharyngeal cellsElectron micrographs of D562 epithelial cells incubated with TIGR4 and G54 strains for 2Â hours. Pneumococci attach to the host cells either as micro-colonies (A - TIGR4) or single colonies (B, D - TIGR4, C (including inset) - G54) and are surrounded by host pseudopodia. Bacteria invade host cells and are internalized into cytoplasmic vacuoles (E - TIGR4 and F - G54). Original magnifications A, 4400X; B, 4400X; C, 4400X (inset, 15000X); D, 26000X; E, 3200X; F, 1650X (inset, 6500X).Back to article page