Platelets were perfused over immobilised BSA, Fibrinogen, wildtype S. gordonii, or purified PadA at 50s-1. (A) Images are representative fields taken from 1 of 3 independent experiments that yielded similar results. (B) The number of platelets adhered was randomly selected from 5 areas on the slide. Images were acquired using x63 oil immersion lens using an argon laser at 488 nm. *P<0.01, **P<0.05, n=3-5.