心內膜炎和脊椎椎間盤炎同時存在於一位病患身上，在臨床上並不多見。在此，我們報告一例35歲海洛英成癮的病患以背痛為表徵，之後證實為脊椎椎間盤炎；同時，還發現由木糖氧化產鹼菌所引發的三尖辦心內膜炎。病患經由內科治療無效而後轉院。有關的文獻指出，心內膜炎和脊椎椎間盤炎之間確實有其相關性；臨床醫師上若能對此有其認識，才能適時的給予病患必要的檢查而有助於治療的成功。除此之外，我們亦特別提出木糖氧化產鹼菌也可以是心內膜炎的致病菌。

It is rare in patient with infective endocarditis associated with spondylodiscitis. Herein, we report a case of 35-year-old male with intravenous heroin addiction representing community-acquired Achromobacter xylosoxidans native tricuspid valve endocarditis with spondylodiscitis as his early presentation and treatment failure in medical therapy. Early recognition of the relationship between infective endocarditis and spondylodiscitis is a key to successful treatment. This case also reminds clinicians about the unusual presentation of infective endocarditis due to Achromobacter xylosoxidans.