Zida Huang1, Qiqiao Wu1, Xinyu Fang1,2, Wenbo Li1, Chaofan Zhang1,3, Huiyi Zeng1, Qijin Wang1, Jianhua Lin1, Wenming Zhang4. 1. Department of Orthopedic Surgery, The First Affiliated Hospital of Fujian Medical University, No. 20 Chazhong Road, Taijiang District, Fuzhou City, Fujian Province, China. 2. Department of Orthopedic Surgery, The Third Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China. 3. Department of Orthopedics and Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China. 4. Department of Orthopedic Surgery, The First Affiliated Hospital of Fujian Medical University, No. 20 Chazhong Road, Taijiang District, Fuzhou City, Fujian Province, China. zhangwm0591@163.com.
Abstract
PURPOSE: This study compared the diagnostic capabilities of culture and broad-range polymerase chain reaction (PCR) using joint fluid (JF), periprosthetic tissue (PT), and sonicated fluid (SF) for the diagnosis of periprosthetic joint infection (PJI). METHODS: Sixty-seven subjects underwent knee or hip revision surgery, with 53 PJI and 14 aseptic failure (AF) cases included retrospectively. JF, PT, and SF samples were collected after a suspension of antibiotics more than two weeks, and culture and broad-range PCR were performed for all samples. RESULTS: The sensitivities of SF culture (83.0%), JF-PCR (83.0%), and SF-PCR (84.9%) were similar (P > 0.05), but each was significantly more sensitive than JF culture (69.8%), PT culture (71.7%), and PT-PCR (34.0%) (P < 0.05). The specificities of JF culture, PT culture, SF culture, JF-PCR, PT-PCR, and SF-PCR were similar (100, 100, 85.7, 85.7, 100, and 78.6%, respectively) (P > 0.05). PCR was unable to accurately detect six polymicrobial infections and two fungal infections. CONCLUSIONS: SF culture, JF-PCR, and SF-PCR were more sensitive than JF culture, PT culture, and PT-PCR for diagnosing PJI among patients who have stopped taking antibiotics for two weeks or more. Compared with PCR methods, SF culture has the advantage of detecting polymicrobial or fungal infections. PT-PCR proved to be insufficiently sensitive for providing correct diagnoses.
PURPOSE: This study compared the diagnostic capabilities of culture and broad-range polymerase chain reaction (PCR) using joint fluid (JF), periprosthetic tissue (PT), and sonicated fluid (SF) for the diagnosis of periprosthetic joint infection (PJI). METHODS: Sixty-seven subjects underwent knee or hip revision surgery, with 53 PJI and 14 aseptic failure (AF) cases included retrospectively. JF, PT, and SF samples were collected after a suspension of antibiotics more than two weeks, and culture and broad-range PCR were performed for all samples. RESULTS: The sensitivities of SF culture (83.0%), JF-PCR (83.0%), and SF-PCR (84.9%) were similar (P > 0.05), but each was significantly more sensitive than JF culture (69.8%), PT culture (71.7%), and PT-PCR (34.0%) (P < 0.05). The specificities of JF culture, PT culture, SF culture, JF-PCR, PT-PCR, and SF-PCR were similar (100, 100, 85.7, 85.7, 100, and 78.6%, respectively) (P > 0.05). PCR was unable to accurately detect six polymicrobial infections and two fungal infections. CONCLUSIONS: SF culture, JF-PCR, and SF-PCR were more sensitive than JF culture, PT culture, and PT-PCR for diagnosing PJI among patients who have stopped taking antibiotics for two weeks or more. Compared with PCR methods, SF culture has the advantage of detecting polymicrobial or fungal infections. PT-PCR proved to be insufficiently sensitive for providing correct diagnoses.
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