| Antiviral | EC50 ratio | Phenotype | Strain | Source | Marker | Assay | Reference |
|---|---|---|---|---|---|---|---|
| Ganciclovir | 1.30 | No resistance | Laboratory strain, Clinical Isolate | Recombinant | Details | Drug-resistant human cytomegalovirus infection in children after allogeneic stem cell transplantation may have different clinical outcomes. (Nov 2000) | |
| Ganciclovir | 3.70 | Intermediate level resistance | Clinical Isolate | Recombinant | Details | Low level drug resistance linked to cytomegalovirus UL97 and UL27 mutations detected in maribavir clinical trials. (Sep 2026) |
| Mutant | Resistances |
|---|---|
| 591-594del |
Ganciclovir:
|
| 591-607del |
Ganciclovir:
|
| A591D |
Ganciclovir:
|