A Comparison of Causative Pathogens in Bone and Prosthetic Joint Infections: Implications for Antimicrobial Therapy

医学 骨髓炎 抗菌剂 金黄色葡萄球菌 内科学 经验性治疗 庆大霉素 回顾性队列研究 抗生素 万古霉素 队列 微生物学 外科 生物 细菌 遗传学
作者
Annalise Unsworth,Bernadette C. Young,Matthew Scarborough,Martin McNally
出处
期刊:Antibiotics [MDPI AG]
卷期号:13 (12): 1125-1125
标识
DOI:10.3390/antibiotics13121125
摘要

Background: The microbiological profile of bone and joint infections is important for determining the empiric choice of both systemic and local antimicrobial therapy. This study assessed whether there was a difference in the bacterial species that were isolated on culture in osteomyelitis (OM), fracture-related infection (FRI) or prosthetic joint infection (PJI). This was a retrospective, observational cohort study of patients who had surgical intervention for PJI or OM or FRI with a positive microbial culture between 2019 and 2022. Methods: Data including patient demographics, the site of injury, JS-BACH score, organism classification and antibiotic resistance to vancomycin and gentamicin were extracted from the medical records. Results: A total of 440 patients were included in this study: 163 patients with osteomyelitis, 109 with fracture-related infection with fixation implants and 168 with prosthetic joint infection. The patients with PJI were older, more likely to be female and had a higher BMI and ASA score compared to those with OM. Patients with PJI were more likely to have a higher JS-BACH score and more complex infections. Staphylococcus aureus was the most commonly isolated organism in all three groups. It was more frequently isolated in osteomyelitis than in PJI (p = 0.016). In both osteomyelitis and FRI, after Staphylococcus aureus, the next most common organisms were Gram-negatives, whilst for PJIs, the most commonly isolated organisms were Staphylococcus aureus, followed by coagulase-negative Staphylococci and then Streptococcus species. The rates of other organisms were broadly similar between the three groups. When adjusted for confounders, including symptom duration, JS-BACH score, the location of injury, age and BMI, there was no statistically significant difference in the presence of Staphylococcus aureus (OR = 0.765; 95% CI 0.633–1.232; p = 0.465) or polymicrobial infection (OR = 1.175; 95% CI 0.803–1.721; p = 0.407). Conclusions: Causative pathogens are similar across bone and joint infections and are independent of the presence of prosthetic material.
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