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. 2006 Dec;30(6):532-5.
doi: 10.1007/s00264-006-0125-8. Epub 2006 Aug 1.

The microbiology of infected hip arthroplasty

Affiliations

The microbiology of infected hip arthroplasty

Imran Rafiq et al. Int Orthop. 2006 Dec.

Abstract

Infection following joint replacement surgery although rare presents a challenging problem. Bacterial resistance to antibiotics is an emerging problem. We analysed the microbiology of 337 single-stage revisions for deep infection. Coagulase negative staphylococcus was found to be the predominant organism, although staphylococcus aureus is gaining importance. Gentamicin only provides cover for 64.1% of organisms. Resistance to this commonly used antibiotic prophylaxis is escalating. Fusidic acid and erythromycin provide improved cover. We would suggest on a microbiological basis that these antibiotics be considered for addition to acrylic bone cement. This will provide local antibiotic delivery when performing a revision for deep infection.

Les infections après prothèses articulaires sont un problème difficile à résoudre, d’autant que les résistances aux antibiotiques devienne de plus en plus marquées. Nous avons analysé la microbiologie de 337 révisions en même temps, pour infection profonde. Un staphylocoque coagulase négatif a été trouvé comme micro-organisme prédominant bien que le staphylocoque doré soit en augmentation. La gentamicine n’est efficace que sur 64,1% des micro-organismes. La résistance à cet antibiotique utilisé communément en prophylaxie va croissant. L’acide fusidique et l‘érythromycine donnent une meilleure couverture en prévention. Nous suggérons que sur la base de ces analyses microbiologiques, ces antibiotiques soient ajoutés de façon traditionnelle au ciment acrylique. Ceci donnera un meilleur résultat des antibiotiques sur le plan local lorsque l’on pratique une révision d’une prothèse articulaire pour infection.

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Figures

Fig. 1
Fig. 1
Pi chart depicting microbiology of the infected total hip replacement. 1974–2005
Fig. 2
Fig. 2
Changing bacteriology in the infected total hip replacement 1974–2005
Fig. 3
Fig. 3
Sensitivity of all organisms at THR to antibiotics
Fig. 4
Fig. 4
Relative sensitivity of antibiotics to coagulase negative staphylococcus (CNS) and Staphylococcus aureus (SA)
Fig. 5
Fig. 5
Changing sensitivity patterns to CNS over time. 1974–2005
Fig. 6
Fig. 6
Changing sensitivity patterns to SA over time. 1974–2005

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