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Storage of fungi using sterile distilled water or lyophilization: comparison after 12 years
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Summary. The methods used in our laboratory for maintaining culture collections of fungi, i.e. storage in sterile distilled water or lyophilization, were evaluated. Seventy‐eight isolates belonging to seven genera were tested. After 12 years of preservation, survival rates associated with distilled water storage and lyophilization were 89.7% and 87.2% respectively. The viability of the dermatophytes after 8 years was confirmed using urease test media, the hair penetration test and dermatophyte test medium (DTM). The results showed that the procedure for maintaining cultures in distilled water is simple, inexpensive and reliable.ZusammenfassungZwei Methoden zur Aufbewahrung von Pilzkulturen in Stammsammlungen wurden vergleichend bewertet, nämlich die Aufbewahrung in destilliertem Wasser und die in lyophilisierten Präparaten. In die Untersuchung wurden 87 Isolate einbezogen, die 7 Gattungen angehörten. Nach 12‐jähriger Aufbewahrung betrug die Isolierungsrate aus destilliertem Wasser 89,7% und die aus Lyophilisaten 87,2%. Darüber hinaus wurde die Vitalität der rekultivierten Dermatophyten nach 8‐jähriger Aufbewahrung mit dem Ureasetest, dem Haarpenetrationstest und auf Dermatophyten‐Testmedium (DTM) geprüft. Die Ergebnisse belegen, daß die Aufbewahrung der Pilze in destilliertem Wasser einfach, billig und zuverlässig ist.
Title: Storage of fungi using sterile distilled water or lyophilization: comparison after 12 years
Description:
Summary.
The methods used in our laboratory for maintaining culture collections of fungi, i.
e.
storage in sterile distilled water or lyophilization, were evaluated.
Seventy‐eight isolates belonging to seven genera were tested.
After 12 years of preservation, survival rates associated with distilled water storage and lyophilization were 89.
7% and 87.
2% respectively.
The viability of the dermatophytes after 8 years was confirmed using urease test media, the hair penetration test and dermatophyte test medium (DTM).
The results showed that the procedure for maintaining cultures in distilled water is simple, inexpensive and reliable.
ZusammenfassungZwei Methoden zur Aufbewahrung von Pilzkulturen in Stammsammlungen wurden vergleichend bewertet, nämlich die Aufbewahrung in destilliertem Wasser und die in lyophilisierten Präparaten.
In die Untersuchung wurden 87 Isolate einbezogen, die 7 Gattungen angehörten.
Nach 12‐jähriger Aufbewahrung betrug die Isolierungsrate aus destilliertem Wasser 89,7% und die aus Lyophilisaten 87,2%.
Darüber hinaus wurde die Vitalität der rekultivierten Dermatophyten nach 8‐jähriger Aufbewahrung mit dem Ureasetest, dem Haarpenetrationstest und auf Dermatophyten‐Testmedium (DTM) geprüft.
Die Ergebnisse belegen, daß die Aufbewahrung der Pilze in destilliertem Wasser einfach, billig und zuverlässig ist.
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