Quantitative disk method for storage of Neisseria gonorrhoeae

Area of Science:

• Microbiology
• Bacteriology
• Cryopreservation

Background:

• Neisseria gonorrhoeae is a significant human pathogen.
• Maintaining viable cultures of N. gonorrhoeae is crucial for research and diagnostics.
• Current storage methods often require frequent subculturing, which can affect bacterial viability and morphology.

Purpose of the Study:

• To develop and evaluate a novel cryopreservation medium for Neisseria gonorrhoeae.
• To assess the long-term viability and morphological stability of N. gonorrhoeae stored in the new medium.

Main Methods:

• A specialized storage medium was formulated using bovine serum albumin, inositol, glutamate, gelatin, and charcoal.
• Thirty-one strains of N. gonorrhoeae were stored in quantitated disks at -70°C.
• Viability and colonial morphology were assessed after 12 and 20 months of storage.

Main Results:

• The developed medium effectively preserved N. gonorrhoeae viability for up to 20 months.
• Bacterial colonial morphology remained stable throughout the storage period.
• The method allows for high-density storage without the need for subculturing.

Conclusions:

• The novel medium provides a reliable method for long-term storage of Neisseria gonorrhoeae.
• This technique simplifies the preservation of bacterial cultures, maintaining their integrity for future use.
• The findings offer a valuable tool for researchers and clinical laboratories working with N. gonorrhoeae.