FIG 3.

Vacuolation of Vero cells by ArtB or ArtAB. Vero cells were incubated with 10 μg/ml ArtB or 13.25 μg/ml ArtAB (equimolar with respect to ArtB) for 1, 4, or 24 h and then examined by phase-contrast microscopy (bar = 0.1 mm).