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Updated: Oct 5, 2025

Knee Arthrocentesis in Adults
Published on: February 25, 2022
A Thorn in a Haystack: A Rare Case of Septic Arthritis
Marta Leal-Dos-Santos1, José N Ferreira2, David Peres3
1Infectious Diseases Department, Hospital de Curry Cabral-Centro Hospitalar Universitário de Lisboa Central, Lisbon, PRT.
Abstract:
Pantoea agglomerans is a facultative anaerobe and environmental bacterium that could be a cause of opportunistic human infections, especially in wound infection with plant material. Arthritis or synovitis secondary to penetrating plant thorn injuries is not frequently reported. We present the case of a 35-year-old otherwise healthy male with a bramble thorn penetrating injury of the left knee. P. agglomerans was isolated from the synovial fluid. The patient was treated with amoxicillin/clavulanate according to sensitivity testing. This case highlights the importance of precise and thorough medical history, especially for less common presentations, as well as source control.
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