We aimed to determine pathogen microorganisms, their antimicrobial resistance patterns, and the effect of initial treatment on clinical outcomes in patients with diabetic foot infection (DFI). Patients with DFI from 5 centers were included in this multicenter observational prospective study between June 2018 and June 2019. Multivariate analysis was performed for the predictors of reinfection/death and major amputation. A total of 284 patients were recorded. Of whom, 193 (68%) were male and the median age was 59.9 ± 11.3 years. One hundred nineteen (41.9%) patients had amputations, as the minor (n = 83, 29.2%) or major (n = 36, 12.7%). The mortality rate was 1.7% with 4 deaths. A total of 247 microorganisms were isolated from 200 patients. The most common microorganisms were (n = 36, 14.6%) and (n = 32, 13.0%). Methicillin resistance rates were 19.4% and 69.6% in and coagulase-negative spp., respectively. Multidrug-resistant was detected in 4 of 22 (18.2%) isolates. Extended-spectrum beta-lactamase-producing Gram-negative bacteria were detected in 20 (38.5%) isolates of (14 of 32) and spp. (6 of 20). When the initial treatment was inappropriate, spp. related reinfection within 1 to 3 months was observed more frequently. Polymicrobial infection ( = .043) and vancomycin treatment ( = .007) were independent predictors of reinfection/death. Multivariate analysis revealed vascular insufficiency ( = .004), hospital readmission ( = .009), C-reactive protein > 130 mg/dL ( = .007), and receiving carbapenems ( = .005) as independent predictors of major amputation. Our results justify the importance of using appropriate narrow-spectrum empirical antimicrobials because higher rates of reinfection and major amputation were found even in the use of broad-spectrum antimicrobials.

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http://dx.doi.org/10.1177/15347346211004141DOI Listing

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