BACKGROUND: Prosthetic joint infections (PJI) are still a major complication of hip and knee arthroplasties. Identification of the causative pathogens and knowledge of their antibiotic susceptibilities are essential for the management of these infections. The main purpose of the study was to identify and compare the causative bacteria of prosthetic knee and hip joint infections in a reference Italian orthopedic center and to characterize antibiotic resistance profiles of bacteria involved. METHODS: Data from 429 patients with diagnosis of PJI were collected from January 2013 to June 2015: 229 presented a hip and 200 a knee prosthesis infection. Prostheses and periprosthetic tissues were treated with dithiothreitol before plating onto different media and broths. Identification and antimicrobial susceptibility testing were carried out by VITEK2 Compact (bioMerieux). RESULTS: There was not a substantial difference in the etiology of hip and knee PJI: staphylococci were the most frequently isolated bacteria in both groups, followed by Enterobacteriaceae and Propionibacterium acnes. Staphylococci showed a high rate of methicillin resistance (144 of 341) and a worrying frequency of isolates were resistant to teicoplanin (9%). Only 8.3% of Enterobacteriaceae produced extended-spectrum beta-lactamases, whereas the rate of carbapenemase-producing bacteria was not significant. CONCLUSION: We observed similar etiology of hip and knee PJIs. Nevertheless, bacteria isolated from knee showed higher resistance rates to glycopeptides and fluoroquinolones when compared with those isolated from the hip. The reason for this difference remains to be elucidated in future studies.

Epidemiology and Antibiotic Resistance of Late Prosthetic Knee and Hip Infections / L. Drago, E. De Vecchi, M. Bortolin, L. Zagra, C.L. Romanò, L. Cappelletti. - In: THE JOURNAL OF ARTHROPLASTY. - ISSN 0883-5403. - 32:8(2017 Aug), pp. 2496-2500. [10.1016/j.arth.2017.03.005]

Epidemiology and Antibiotic Resistance of Late Prosthetic Knee and Hip Infections

L. Drago;E. De Vecchi;M. Bortolin;L. Cappelletti
2017

Abstract

BACKGROUND: Prosthetic joint infections (PJI) are still a major complication of hip and knee arthroplasties. Identification of the causative pathogens and knowledge of their antibiotic susceptibilities are essential for the management of these infections. The main purpose of the study was to identify and compare the causative bacteria of prosthetic knee and hip joint infections in a reference Italian orthopedic center and to characterize antibiotic resistance profiles of bacteria involved. METHODS: Data from 429 patients with diagnosis of PJI were collected from January 2013 to June 2015: 229 presented a hip and 200 a knee prosthesis infection. Prostheses and periprosthetic tissues were treated with dithiothreitol before plating onto different media and broths. Identification and antimicrobial susceptibility testing were carried out by VITEK2 Compact (bioMerieux). RESULTS: There was not a substantial difference in the etiology of hip and knee PJI: staphylococci were the most frequently isolated bacteria in both groups, followed by Enterobacteriaceae and Propionibacterium acnes. Staphylococci showed a high rate of methicillin resistance (144 of 341) and a worrying frequency of isolates were resistant to teicoplanin (9%). Only 8.3% of Enterobacteriaceae produced extended-spectrum beta-lactamases, whereas the rate of carbapenemase-producing bacteria was not significant. CONCLUSION: We observed similar etiology of hip and knee PJIs. Nevertheless, bacteria isolated from knee showed higher resistance rates to glycopeptides and fluoroquinolones when compared with those isolated from the hip. The reason for this difference remains to be elucidated in future studies.
No
English
epidemiology; hip; infections; knee; prostheses
Settore MED/07 - Microbiologia e Microbiologia Clinica
Articolo
Esperti anonimi
Pubblicazione scientifica
ago-2017
Elsevier
32
8
2496
2500
5
Pubblicato
Periodico con rilevanza internazionale
Aderisco
info:eu-repo/semantics/article
Epidemiology and Antibiotic Resistance of Late Prosthetic Knee and Hip Infections / L. Drago, E. De Vecchi, M. Bortolin, L. Zagra, C.L. Romanò, L. Cappelletti. - In: THE JOURNAL OF ARTHROPLASTY. - ISSN 0883-5403. - 32:8(2017 Aug), pp. 2496-2500. [10.1016/j.arth.2017.03.005]
reserved
Prodotti della ricerca::01 - Articolo su periodico
6
262
Article (author)
no
L. Drago, E. De Vecchi, M. Bortolin, L. Zagra, C.L. Romanò, L. Cappelletti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/531970
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