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. Author manuscript; available in PMC: 2007 Nov 13.
Published in final edited form as: Biomaterials. 2006 Apr 24;27(24):4304–4314. doi: 10.1016/j.biomaterials.2006.03.038

Table 2.

Decrements in colony count upon challenge by gels

Organism Number of gel discs per tube PEG containing gel
 Lactose containing gel
Bacterial concentration at time (CFU/ml)
 Bacterial concentration at time (CFU/ml)
0 h 24 h 48 h 0 h 24 h 24 h
S. aureus 1 Disc  2.5 × 105 1.86 × 103  1.72 × 103  2.5 × 105 2.18 × 103 2.06 × 103
2 Discs 1.05 × 103  9.06 × 102 1.96 × 103 1.55 × 103
3 Discs 4.80 × 102  4.25 × 102 1.01 × 103 9.05 × 102
S. pyogenes 1 Disc 2.27 × 105 1.49 × 103  1.19 × 103 2.27 × 105 1.79 × 103 1.48 × 103
2 Discs 1.01 × 103  6.05 × 102 1.19 × 103 7.95 × 102
3 Discs 2.55 × 102  1.55 × 102 6.00 × 102 3.65 × 102
Diphtheroid 1 Disc 2.33 × 105 5.80 × 102  4.25 × 102 2.33 × 105 8.45 × 102 6.85 × 102
2 Discs 2.10 × 102 90 5.35 × 102 3.90 × 102
3 Discs 9 15 3.10 × 102 2.35 × 102
P. aeruginosa 1 Disc 2.28 × 105 5.95 × 102  1.80 × 102 2.28 × 105 8.20 × 102 3.85 × 102
2 Discs 0 — 0 —
3 Discs 0 — 0 —
E. coli 1 Disc 2.32 × 105 1.36 × 103  8.95 × 102 2.28 × 105 1.98 × 103 1.52 × 103
2 Discs 0 — 0 —
3 Discs 0 — 0 —
A. baumanii 1 Disc 2.35 × 105 9.15 × 102  7.85 × 102 2.35 × 105 1.13 × 103 9.80 × 102
2 Discs 5.70 × 102  4.45 × 102 7.65 × 103 6.45 × 102
3 Discs 2.55 × 102  1.75 × 102 5.05 × 102 3.75 × 102
C. perfringens 1 Disc 2.38 × 105  1.02 × 103 2.38 × 105 1.39 × 103
2 Discs  7.10 × 102 9.06 × 102
3 Discs  3.85 × 102 6.05 × 102
C. albicans 1 Disc 2.33 × 105 5.80 × 102  4.40 × 102 2.33 × 105 8.30 × 102 7.30 × 102
2 Discs 3.00 × 102  2.00 × 102 4.65 × 102 3.85 × 102
3 Discs 1.55 × 102 35 2.30 × 102 1.70 × 102

Target microorganisms were seeded at 105 CFU/ml. Parallel tubes were seeded with one to three gels. At 24 and 48 h the CFU/ml were determined. Anaerobic C. perfringens was counted only at 48 h considering their normal growth patterns. Shown are the bacterial counts in CFU/ml. Placement of a control tube having microorganisms at 105 at 0 h gave non log growth counts at 24 and 48 h for aerobes and 48 h for anaerobes (data not shown). The composition of both gels are the same as described in earlier table.