CHARMD
Comprehensive Herpesviruses Antiviral drug Resistance Mutation Database
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Last update : Mon 20 Apr 2026
TOP
N495K
Virus:
Human betaherpesvirus 5
Gene:
UL54
Resistance summary:*
Ganciclovir:
No resistance
Cidofovir:
No resistance
Foscarnet:
Intermediate level resistance
Cidofovir:
No resistance
Cidofovir:
No resistance
Foscarnet:
Low level resistance
Foscarnet:
Low level resistance
Ganciclovir:
No resistance
Ganciclovir:
No resistance
*If there is more than one line per antiviral, please refer to the table below
Antiviral assays:
Antiviral
EC50 ratio
Phenotype
Strain
Source
Marker
Assay
Reference
Ganciclovir
1.10
No resistance
Recombinant
Details
A novel mutation in the UL54 gene of human cytomegalovirus isolates that confers resistance to foscarnet. ( 2006)
Cidofovir
1.10
No resistance
Recombinant
Details
A novel mutation in the UL54 gene of human cytomegalovirus isolates that confers resistance to foscarnet. ( 2006)
Foscarnet
3.40
Intermediate level resistance
Recombinant
Details
A novel mutation in the UL54 gene of human cytomegalovirus isolates that confers resistance to foscarnet. ( 2006)
Cidofovir
1.20
No resistance
Laboratory strain, Clinical Isolate
Details
Foscarnet resistance mutations mapping to atypical domains of the cytomegalovirus DNA polymerase gene. (Feb 2017)
Cidofovir
1.00
No resistance
Laboratory strain, Clinical Isolate
Details
Foscarnet resistance mutations mapping to atypical domains of the cytomegalovirus DNA polymerase gene. (Feb 2017)
Foscarnet
2.50
Low level resistance
Laboratory strain, Clinical Isolate
Details
Foscarnet resistance mutations mapping to atypical domains of the cytomegalovirus DNA polymerase gene. (Feb 2017)
Foscarnet
2.60
Low level resistance
Laboratory strain, Clinical Isolate
Details
Foscarnet resistance mutations mapping to atypical domains of the cytomegalovirus DNA polymerase gene. (Feb 2017)
Ganciclovir
1.30
No resistance
Laboratory strain, Clinical Isolate
Details
Foscarnet resistance mutations mapping to atypical domains of the cytomegalovirus DNA polymerase gene. (Feb 2017)
Ganciclovir
1.40
No resistance
Laboratory strain, Clinical Isolate
Details
Foscarnet resistance mutations mapping to atypical domains of the cytomegalovirus DNA polymerase gene. (Feb 2017)
Tilloy
et al.
, 2024
Interdeposit Digital Number: IDDN.FR.001.420004.000.S.X.2024.000.31230