**5. Conclusions**

Although *Gordonia* spp. are environmental bacteria, they are observed to be increasing implications in human infection aetiology. However, as the bacteria are ubiquitous in the environment, soil and water, the differentiation between environmental contamination and pathogenic meaning can be problematic and questionable. These difficulties may result in the underdiagnosing of *Gordonia* spp. infections [28].

What is worth underlining is that in almost all cited publications and reports, the authors highlighted the difficulties in the final identification of *Gordonia* species. Thus, this emerging pathogen requires extensive and contemporary microbiological diagnostics, including molecular identification on gene sequence. That takes us to a strong suggestion that the diagnostic path and microbiological investigation need to be performed very reliably and meticulously.

The assessment of the clinical significance of the *Gordonia* spp. is becoming increasingly relevant. The reports of *Gordonia* infections, especially in immunocompetent patients, are valuable as the source of knowledge on precise identification based on genomic sequencing. Consequently, a better understanding of these organisms could lead to their more frequent recognition as pathogens in the broader range of human diseases. The more reports about the difficult-to-diagnose *Gordonia* spp. the more knowledge and diagnostical experience that supports the diagnostic path recommendations. The presented case draws attention to mild *Gordonia* species infections, which may otherwise remain undiagnosed.

**Author Contributions:** Conceptualization M.F. and E.A.-K.; data curation: M.F., M.K., R.K., P.P., D.F., A.Z. and L.J.; writing, original draft preparation M.F., M.K., R.K., P.P. and E.A.-K.; writing, review and editing M.F., M.K. and E.A.-K.; visualization: D.F., L.J. and M.F. All authors have read and agreed to the published version of the manuscript.

**Funding:** This manuscript received no external funding.

**Institutional Review Board Statement:** Ethical review and approval were waived for this case report due to the retrospective character of published data.

**Informed Consent Statement:** Informed consent for publication has been obtained from the patient to publish this paper.

**Data Availability Statement:** The clinical data of the patient are available in the hospital database.

**Conflicts of Interest:** The authors declare no conflict of interest.
