Mandibular Nodule Caused by Mycobacterium marinum with False Positive Interferon-γ Release Assay. A Case Report

Kentaro Iwata; Yoshie Takai; Nozomi Kitada; Naomi Morishita; Hiroaki Kiyona

doi:10.2169/internalmedicine.0595-22

This article has now been updated. Please use the final version.

Mandibular Nodule Caused by Mycobacterium marinum with False Positive Interferon-γ Release Assay. A Case Report

Kentaro Iwata, Yoshie Takai, Nozomi Kitada, Naomi Morishita, Hiroaki Kiyona

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Keywords: Mycobacterium marinum, interferon-γ release assay, false-positive

JOURNAL OPEN ACCESS Advance online publication

Article ID: 0595-22

DOI https://doi.org/10.2169/internalmedicine.0595-22

The final version of this article is now available: Vol. 62 (2023), No. 12 pp. 1857-1859

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Abstract

Mycobacterium marinum is a ubiquitous organism inhabiting both fresh and salt water. It can cause human diseases such as skin and soft tissue infection. The organism is also known to cause a false positive reaction to interferon-γ release assay, the test to diagnose latent tuberculosis infection. Here, we present a case of submandibular nodule caused by M. marinum with positive T-SPOT.TB test, which was likely to be false positive.

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