Naegleria pringsheimi De Jonckheere (ATCC® 30960)

Organism: Naegleria pringsheimi De Jonckheere  /  Depositor: W Balamuth

Permits and Restrictions

View Permits

Deposited As Naegleria gruberi Schardinger
Strain Designations Singh (S)
Biosafety Level 1
Isolation
freshwater, England
Product Format frozen
Type Strain no
Comments
CCAP 1518/1s is no longer available from CCAP
Maximum temperature tolerance 37C
genetic cluster M
Genetic cluster M [RF34321] = Naegleria gruberi cluster 3 [RF34247].
Equivalent to CCAP 1518/1s, Group I intron in SSUrRNA gene
Medium ATCC® Medium 1034: Modified PYNFH medium (Available from ATCC as ATCC cat. no. 327-X)
Growth Conditions
Temperature: 25.0°C
Duration: axenic
Cryopreservation
1.   Harvest cells from a culture that is at or near peak density by centrifugation at 600 x g for 5 min. Pool the cell pellets into a single tube.

2.   Adjust the concentration of cells to 2.0 x 106/ml.  If the concentration is too low, centrifuge at 600 x g for 5 minutes and resuspend the cell pellet with a volume of supernatant to yield the desired concentration.

3.   Prepare a 15% (v/v) sterile DMSO solution in ATCC medium 1034 as follows:  Add the required volume of DMSO to a glass screw-capped test tube and place on ice.  Allow the DMSO to solidify.  Add the required volume of refrigerated ATCC medium 1034.  Dissolve the DMSO by inverting several times.  If the DMSO solution is not prepared on ice, an exothermic reaction will occur that may precipitate certain components of the medium.

4.   Mix the cell preparation and the DMSO in equal portions. Thus, the final concentration will be 106 and 7.5% (v/v) DMSO. The time from the mixing of the cell preparation and DMSO stock solution before the freezing process is begun should be no less than 15 min and no longer than 60 min.

5.   Dispense in 0.5 ml aliquots into 1.0 - 2.0 ml sterile plastic screw-capped cryules (special plastic vials for cryopreservation).

6.   Place vials in a controlled rate freezing unit. From room temperature cool at -1°C/min to -40°C. If freezing unit can compensate for the heat of fusion, maintain rate at -1 C/min through heat of fusion. At -40°C plunge ampules into liquid nitrogen.

7.   The frozen preparations are stored in either the vapor or liquid phase of a nitrogen refrigerator.

8.   To establish a culture from the frozen state place an ampule in a water bath set at 35°C. Immerse the vial enough to cover only the frozen material. Do not agitate the vial.

9.   Immediately after thawing, do not leave in the water bath.  Aseptically remove the contents of the ampule and inoculate into a fresh tube or flask of ATCC medium 1034.

10.          Incubate at 25°C with the cap screwed on tightly (incubate a test tube on a 15° horizontal slant).

Name of Depositor W Balamuth
Chain of Custody
ATCC <<--W Balamuth<<--B. Singh <<--- E.G. Pringsheim
References

De Jonckheere JF. A Group I intron in the SSUrDNA of some Naegleria spp. demonstrated by polymerase chain reaction amplification. J. Eukaryot. Microbiol. 40: 179-187, 1993. PubMed: 8461891

Adams M, et al. A genetic approach to species criteria in the amoeba genus Naegleria using allozyme electrophoresis. Int. J. Parasitol. 19: 823-834, 1989. PubMed: 2635158

Robinson BS, et al. Discontinuous genetic variation among mesophilic Naegleria isolates: Further evidence that N. gruberi is not a single species. J. Protozool. 39: 702-712, 1992. PubMed: 1453360

De Jonckheere JF. A century of research on the amoeboflagellate genus Naegleria. Acta Protozool. 41: 309-342, 2002.

name change from Naegleria gruberi to N. pringsheimi per TA Nerad, by e-mail message dated Dec 9 2002

Notice: Necessary PermitsPermits

These permits may be required for shipping this product:

  • Customers located in the state of Hawaii will need to contact the Hawaii Department of Agriculture to determine if an Import Permit is required. A copy of the permit or documentation that a permit is not required must be sent to ATCC in advance of shipment.
Basic Documentation