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. 1989 Aug;33(8):1174–1178. doi: 10.1128/aac.33.8.1174

Efficacy of dicloxacillin-coated polyurethane catheters in preventing subcutaneous Staphylococcus aureus infection in mice.

R J Sherertz 1, D M Forman 1, D D Solomon 1
PMCID: PMC172619  PMID: 2802545

Abstract

In a mouse model, dicloxacillin-coated polyurethane catheters or control (uncoated) catheters were placed subcutaneously and then Staphylococcus aureus was inoculated at the time of insertion, 24 or 48 h later. The in vivo half-life of the antibiotic was 11 to 16 h. When 10(5) CFU of S. aureus were inoculated at the time of catheter insertion, dicloxacillin-coated catheters kept the number of S. aureus removed from catheters by sonication below 10(2) CFU at 12, 24, 48, and 96 h after inoculation compared with titers greater than 10(3.5) CFU for control catheters (P less than 0.05). When S. aureus was inoculated 24 h after catheter insertion, control catheters averaged greater than 10(2) CFU of S. aureus removed compared with less than 10(1.5) CFU for the dicloxacillin-coated catheters (P less than 0.05). No difference was found between coated and control catheters when S. aureus was inoculated 48 h after catheter insertion, but S. aureus titers averaged less than 10(2) CFU for all experimental groups. Our data suggest that in mice, regional prophylaxis of S. aureus subcutaneous space infection is feasible with catheters coated with dicloxacillin and that the presence of antibiotic is only necessary for the first 24 to 48 h.

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Selected References

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