Trypanosoma brucei rhodesiense Stephens and Fantham
商品貨號
B171877
Deposited As
Trypanosoma brucei rhodesiense
Strain Designations
KETRI 269
Biosafety Level
2
Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.
Isolation
Human clinical isolate, Kitanga, Tanzania, 1960
Product Format
frozen
Storage Conditions
Frozen Cultures: -70°C for 1 week; liquid N2 vapor for long term storage
Freeze-dried Cultures: 2-8°C
Live Cultures: See Protocols section for handling information
Comments
Produces acute and fatal parasitemia in mice
Growth Conditions
Culture System:In vivo, Balb/c mouse
Cryopreservation
Reagents
Trypanosome Dilution Buffer
20 mM Na2HPO4
2 mM NaH2PO4
80 mM NaCl
5 mM KCl
1 mM MgSO4
20 mM glucose
Adjust the pH of the solution to 7.7 and filter sterilize.
Harvest and Preservation
Prepare a 40% (v/v) sterile glycerol solution in Trypanosome Dilution Buffer (TDB).
Dispense 0.5 mL of anticoagulant solution into a 15 mL test tube. Add to the anticoagulant blood collected by orbital bleeding from mice that had reached or are near peak parasitemia. Invert the tube several times to mix the blood with the anticoagulant.
In a separate test tube, add the heparinized blood dropwise to the 40% glycerol solution. Note that blood should be mixed with glycerol solution in a 1:1 ratio to obtain a final concentration of cryoprotectant of 20% (v/v). Mix slowly by inversion and place the tube on ice. The freezing process should start 15 to 30 minutes following the addition of the heparinized blood to the cryoprotectant solution.
Dispense 0.5 mL aliquots of blood suspension into 1.0 - 2.0 mL sterile plastic screw-capped cryovials. Place the vials in a controlled rate freezing unit. From room temperature cool the vials at -1°C/min to -40°C. If the freezing unit can compensate for the heat of fusion, maintain rate at -1°C/min through this phase. At -40°C, plunge vials into liquid nitrogen. Alternatively, place the vials in a Nalgene 1oC freezing container. Place the container at -80°C for 1.5 to 2 hours and then plunge vials into liquid nitrogen.
To thaw a frozen ampule, place in a 35°C water bath, until thawed (2-3 min). Immerse the ampule just sufficient to cover the frozen material. Do not agitate the ampule.
Immediately after thawing, aseptically remove the contents of the ampule with a syringe and inoculate a Balb/c mouse. Follow the protocol for maintenance of the culture above.
Name of Depositor
CJ Bacchi
References
Bacchi CJ, et al. Differential susceptibility to DL-alpha-difluoromethylornithine in clinical isolates of Trypanosoma brucei rhodesiense. Antimicrob Agents Chemother 34(6): 1183-1188, 1990. PubMed: 2118325
