Average of Log10 transformed CFU/sample for each species and material at each concentration of antibiotic tested.

Unless otherwise noted (at times coupons fell out of the rod in the reactor and were not included in analysis), n = 6 collagen coupons were analyzed and n = 5 polycarbonate coupons were analyzed. It was hypothesized that biofilms of varying species grown on a complex collagen network would be less susceptible to antibiotics as compared to biofilms grown on polycarbonate coupons. The criteria for support of the hypothesis was a difference of 1 log10 unit or greater in bacterial counts between coupon types.