We use cookies to help us improve the website and your experience using it. You may delete and block all cookies from this site at any time. However, please note this may result in parts of the site no longer working correctly. If you continue without changing your settings we will assume you are happy to receive all cookies on this site.


Neisseria meningitidis Minimum inhibitory concentration

General information

Collection container (including preservatives): Not applicable

Specimen type: Referral of Viable pure cultures on slopes and transport swabs

Collection including preservative: Not applicable

Specimen transport: Only submit viable isolate samples in approved packaging (UN3373) which are suitable for Royal Mail post (airfreight) or commercial couriers such as HAYS DX.

Agar slopes: where possible pure, viable cultures; inoculated on chocolate (heated) blood agar, blood agar or Dorset egg slopes after establishing growth by overnight incubation at 37°C.

On occasion it may be necessary to submit an unincubated culture. This can save time but requires a heavy inoculum to ensure survival in transport. Please indicate on the request form if the material (slope) has not been incubated.

Short-term storage of sloped cultures is optimal at 30°C if there are delays before submission.

Minimum volume of sample: Not applicable

Special precautions: The MICs routinely determined on submitted isolates are: penicillin, cefotaxime, rifampicin, ciprofloxacin and sulphonamide (sulphamethoxazole) using Etest (Biomerieux) gradient diffusion methodology.
Other antibiotic susceptibility tests may be performed on request.

Laboratory information

Measurement units: mg/L

Biological reference units: Not applicable

Turnaround time: 48 hrs if requested

Routine final report is issued within 1-2 weeks

Clinical information

Clinical decision points: Not applicable

Factors known to significantly affect the results: None known