| OE | external ear infection |
| VZV | varicella-zoster virus |
| CNS | coagulase-negative Staphylococci |
| CIC | complete in the canal hearing aids |
| BTE | behind-the-ear hearing aids |
| SNP | single-nucleotide polymorphism |
| AMPs | antimicrobial peptides |
| hBD 1-3 | human beta defensins 1-3 |
| Lfc | human lactoferrin |
| hSLPI | human leukoprotease inhibitor secretin |
| BPI | human protein |
| HNP1-3 | human neutrophil peptide |
| AMLs | endogenous lipid molecules |
| LL-37 | peptide Leu-Leu-37 |
| OEAD | otitis externa acuta diffusa |
| HBV | hepatitis B virus |
| SARS-CoV2 | severe acute respiratory syndrome coronavirus 2 |