Gradient Strip (GC Etest)
Neisseria gonorrhoeae Antimicrobial Susceptibility Testing Services at the Microbial Diseases Laboratory
Effective 06/26/2023, the California Department of Public Health’s (CDPH) Microbial Diseases Laboratory (MDL) will offer
Neisseria gonorrhoeae antibiotic susceptibility testing (AST) for azithromycin, ceftriaxone and cefixime using bioMérieux Etest® gradient strip. In the future, ciprofloxacin will be added to the AST panel and information will be added to the Test Information Sheet.
Additional information on antibiotic-resistant
N. gonorrhoeae is available from the CDPH Sexually Transmitted Disease Control Branch (STDCB) at the STDCB Antibiotic Resistant Gonorrhea Center of Excellence webpage, including gonorrhea treatment guidelines and management of suspected treatment failure:
Key Contact Information:
Etest, Gradient Strip
Neisseria gonorrhoeae AST:
MDL Bacterial Diseases Section (BDS) Laboratory: (510) 412-3903
CDPH STD Control Branch:
Phone: (510) 620-3400