Figure 3
From: Staphylococcus aureus forms spreading dendrites that have characteristics of active motility

Movement of S. aureus in comets.
These four photos show the same comet at different times, in sequence from (A–D) (summary photos of comet seen in Video S3). The main S. aureus colony is just below the bottom left of each image frame. The comet core is moving forwards and the bacteria in the comet tail largely do not move apart from growth in situ as a comparison of the images shows. Surfactant movement alone would not be able to move the comet head without disrupting the comet tail. Scale bar = 60 μm.