Gonococcal arthritis is an uncommon but potentially severe complication of Neisseria gonorrhoeae infection. The clinical presentation can be variable and conventional microbiological tests sometimes fail to detect the organism, contributing to underdiagnosis. This retrospective study aimed to describe clinical characteristics, compare diagnostic performance of polymerase chain reaction (PCR) versus culture, and report patient outcomes for gonococcal arthritis cases managed at a single tertiary center over a 20-year period.
The investigators retrospectively reviewed all cases admitted to the University Hospital of Liège from January 2005 to June 2025 with confirmed gonococcal arthritis (n = 7). Inclusion required arthritis defined by either clinical joint swelling or an effusion visualized on ultrasonography plus microbiological evidence of N. gonorrhoeae. Microbiological confirmation was defined as a positive PCR or a positive culture from synovial fluid or blood. Clinical, microbiological and treatment data were extracted and analyzed. The abstract does not report detailed treatment regimens, durations of follow-up, or specific diagnostic protocols beyond the PCR and culture comparisons.
Seven patients met inclusion criteria. The cohort had a mean age of 42 years and 57% were male. On average three joints were affected per patient. The joints most commonly involved were the knee, ankle, and fingers, reflecting the oligo- to polyarticular patterns often described with disseminated gonococcal infection.
Urogenital clinical symptoms were reported in 43% of patients, indicating that more than half of cases did not have concurrent urogenital complaints. When urogenital specimens were tested by PCR, 66% were positive. The authors note that genitourinary PCR and clinical symptoms may lack sensitivity and are not uniformly present in patients with gonococcal arthritis, so absence of urogenital findings does not exclude disseminated infection.
Synovial fluid PCR demonstrated the highest diagnostic yield in this series: it was positive in all cases in which it was performed. Synovial fluid culture was less sensitive and required longer incubation before becoming positive. Blood cultures had a low positivity rate (29%), underscoring limited diagnostic utility of blood cultures in this cohort. The findings support prioritizing synovial fluid PCR when gonococcal arthritis is suspected.
Where timing data were reported, synovial fluid PCR had a shorter mean time to positivity compared with synovial fluid culture (1.7 days vs 2.8 days). This difference suggests that PCR can provide more rapid diagnostic confirmation, which may facilitate earlier targeted therapy and management decisions. The abstract does not provide ranges, standard deviations, or the number of samples used to calculate these means.
All patients received therapy deemed appropriate by the treating teams; however, the abstract does not specify antibiotic regimens, durations, or adjunctive measures. Clinical outcomes were suboptimal: at hospital discharge no patient had achieved full recovery, and at the last follow-up visit only one patient had complete recovery. Residual joint impairment was common despite therapy, highlighting the potential for persistent morbidity even when infection is treated.
The authors emphasize the clinical interest of systematic synovial fluid PCR in suspected gonococcal arthritis. Compared with blood and synovial fluid cultures, synovial fluid PCR offered superior diagnostic yield and faster results. Blood cultures demonstrated low yield and synovial fluid culture showed delayed positivity relative to PCR. Because urogenital symptoms and genitourinary PCR were not uniformly positive, reliance on genital testing or symptoms alone may miss cases.
Clinical implications suggested by the study include incorporating synovial fluid PCR into diagnostic pathways for septic arthritis when N. gonorrhoeae is in the differential diagnosis, and maintaining high clinical suspicion even in the absence of genitourinary complaints.
This report is a small retrospective series (n = 7) from a single center spanning two decades, which limits generalizability and statistical power. The abstract does not provide detailed information on antibiotic regimens, timing and duration of follow-up, imaging beyond ultrasonography, or functional outcome measures. Specifics on how many synovial fluid PCR tests were performed versus how many samples underwent culture are not reported in the abstract. These gaps limit assessment of optimal management strategies and the relationship between diagnostic timing and long-term joint outcomes.
In this 20-year retrospective series of seven patients with gonococcal arthritis, synovial fluid PCR had the highest diagnostic yield and fastest time to positivity compared with culture, while blood cultures were infrequently positive. Urogenital symptoms and genitourinary PCR were not uniformly present. Despite appropriate therapy, persistent joint impairment was frequent, underscoring the need for early recognition, systematic use of rapid molecular diagnostics on synovial fluid, and further study of treatment strategies to improve long-term outcomes. The abstract does not report detailed treatment protocols or follow-up durations.