Nongonococcal Infectious Arthritis
- Author: Edward Dwyer, MD; Chief Editor: Herbert S Diamond, MD more...
Background
Nongonococcal infectious arthritis is an acute or subacute illness with potentially significant morbidity and mortality. Bacteria, mycobacteria, and fungi can cause the disease. Both healthy individuals and individuals with predisposing conditions can be infected. Nongonococcal infectious arthritis is typically a monoarticular disease, but, in approximately 10% of patients, it affects multiple joints.[1, 2] Without treatment, the condition results in joint destruction.
Pathophysiology
Infectious arthritis ensues when foreign organisms invade the synovium or joint space. These organisms invade the joint via (1) hematogenous dissemination from a distant site; (2) periarticular infection, such as osteomyelitis or adjacent soft-tissue infection; or (3) direct introduction through penetrating trauma or procedural intervention, such as arthrocentesis or surgical repair.
Epidemiology
Frequency
United States
The yearly incidence of bacterial arthritis varies from 2-5 cases per 100,000 persons in the general population to 28-38 cases per 100,000 persons in patients with rheumatoid arthritis.[1]
Mortality/Morbidity
- Nongonococcal infectious arthritis carries a mortality rate of 11%.[3]
- Joint destruction occurs in 25%-50% of cases.[4]
Race
- No inherent racial predilections for infectious arthritis are recognized.
Sex
- Sex is not an independent risk factor for infectious arthritis.
Age
- Age older than 80 years has been shown in some studies to be an independent risk factor for susceptibility to bacterial arthritis.
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