Background: Septic arthritis is an emergency in orthopedics. Several mechanisms
have been described: hematogenous spread, extension from an adjacent focus and
direct inoculation, being the first one the most frequent mechanism.
If not handled properly neither early, what can lead to the destruction of the
articular cartilage and the production of sequelae. In an incipient case, good results
can be got with conservative treatment, but usually surgical management is
necessary for the resolution of the process.
Material and Methods: We present a case of a 5 year old child who suffered an
episode of arthritis after the administration of vaccine against serogroup B
Neisseria Meningitidis. Symptoms began 2 hours after vaccination with pain and
fever of up to 39ÂșC. At this moment, arthrocentesis was performed and intravenous
antimicrobial therapy was initiated.
Results: The evolution was favorable with no need of surgical
treatment. Symptoms continued going down after the management
with arthrocentesis and intravenous antibiotic treatment, until disappearing
completely in a few days. During the follow-up, no signs of recurrence have
appeared after 12 months.
Conclusions: despite the fact that the hematogenous spread is the most frequent
mechanism of establishment of arthritis septic, direct inoculation can justify a case
of arthritis after vaccination in the deltoid region. We must be careful during
vaccination with bacteria toxoids in the deltoid region, due to the risk of reactive
arthritis and its differential diagnosis with septic arthritis. More studies are needed
to clarify the diagnoses in the borderline cases, being molecular biology techniques
as protein chain reaction a fast and useful tool.