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[Lyophilization of dermatophytes].
A Rybnikár1, J Schmied, J Strossa
1Bioveta, n. p., Ivanovice na Hané.
Veterinarni Medicina
|August 1, 1987
Summary
Lyophilization survival of dermatophytes depends on fungal structures, with microconidia yielding the best results. Effective cryoprotective media and refrigerator storage enhance long-term viability of fungal cultures.
Area of Science:
- Mycology
- Microbiology
- Cryobiology
Context:
- Dermatophyte preservation is crucial for research and diagnostics.
- Lyophilization (freeze-drying) is a common method for microbial culture preservation.
- Understanding factors affecting lyophilization success is essential for maintaining viable fungal stocks.
Purpose:
- To evaluate the impact of morphological characteristics on dermatophyte survival post-lyophilization.
- To identify optimal cryoprotective agents and storage conditions for lyophilized dermatophyte cultures.
- To determine suitable media for the reconstitution of lyophilized dermatophyte strains.
Summary:
- Dermatophyte strains with abundant microconidia exhibited higher survival rates after lyophilization compared to those with predominantly macroconidia, chlamydospores, or hyphae.
- A cryoprotective medium containing 2.5% gelatine and 3.75% saccharose was effective for preserving Trichophyton mentagrophytes and T. verrucosum for two years.
- Saccharose solutions alone also provided good results, though sometimes with increased residual moisture. Refrigerator storage significantly outperformed laboratory temperature storage for maintaining viability.
Impact:
- Provides critical data for optimizing lyophilization protocols for dermatophyte species.
- Informs the selection of appropriate cryoprotectants and storage conditions to maximize the longevity of fungal cultures.
- Guides the choice of reconstitution media for successful revival of lyophilized dermatophytes, ensuring their utility in scientific studies.