Available online 3 July 2022, 102609

In this report, we described a case of subcutaneous abscess due to Prevotella bivia which developed in the right shoulder of a middle-aged female.

The abscess recurred several times, and finally we could get a good control about it.

The Prevotella bivia infection to a part of body other than urogenital system and intra-oral space is rare, and its recurrence is not reported previously.

We discussed some causes of such an uncommon and recurrent infection. However, they remained unclear.

Prevotella bivia (P. bivia) is an anaerobic Gram-negative rod usually inhabiting in the urogenital system, and sometimes in the intra-oral space, whose infection to other parts of body is extremely rare. In this report, we describe a rare case of a recurrent infectious abscess due to P. bivia in the right shoulder of a middle-aged female.

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