MicroPelletRT: A MicroPelletRT consists of a lyophilized pellet of a single microorganism strain with a defined mean assay value inside a plastic vial and one separate vial with 1ml rehydration fluid. Adding the reconstitution fluid to the pellet vial it forms a suspension with a defined assay value of 10-100 CFU/0,1ml as mandated by USP and Ph.Eur. for growth promotion tests.


The MicroPelletRT are a cost-effective alternative to labour-intensive dilution/colony count procedures.

After processing these preparations of lyophilized microorganisms as directed you will achive a quality assurance challenge as required by Ph.Eur./USP to perform growth promotion tests. MicroPelletRT can be traced back to ATCC reference strains and are not more than 4 passages away from the reference strain.

MicroPelletsRT have the following features:

  • Each MicroPelletRT is packed separately in a vial- this prevents any spoilage of the lyophilized preparation by humidity etc.
  • MicroPelletRT are easy to use: Simply unscrew the cap and rehydrate with the provided fluid. As MicroPelletRT are lyophilized and not just dried suspensions like other products currently available, they rehydrate instantly and can be used immediately.
  • Each pellet contains 100-1000 colony forming units (CFU'S), and when rehydrated with 1 ml it produces 10 doses of 10-100 CFU's/0,1ml. No additional dilution step is necessary!
  • MicroPelletRT are delivered in economical packs of 2 vials with one pellet/vial.
  • The neccesary quantity of rehydration fluid (1 vial of 1ml per pellet) comes automatically with the pellets.
  • MicroPelletsRT can easily be stored at 2-8°C.
  • MicroPelletRT does not require dry ice. Shipping costs are reduced.
Name Category code Additional data
MicroPelletRT Streptococcus pyogenes ATCC® 19615™ MicroPellet RT MPRTS090
MicroPelletRT Staphylococcus epidermidis WDCM 00036-ATCC® 12228™ MicroPellet RT MPRTS051
MicroPelletRT Staphylococcus aureus subsp. aureus WDCM 00034-ATCC® 25923™ MicroPellet RT MPRTS039
MicroPelletRT Staphylococcus aureus subsp. aureus WDCM 00033,WDCM 00193,WDCM 00195-ATCC® 6538P™ MicroPellet RT MPRTS048
MicroPelletRT Staphylococcus aureus subsp. aureus WDCM 00032,WDCM 00193 -ATCC® 6538™ MicroPellet RT MPRTS047
MicroPelletRT Salmonella enterica subsp. enterica serovar Typhimurium WDCM 00121-ATCC® 13311™ MicroPellet RT MPRTS103
MicroPelletRT Salmonella enterica subsp. enterica serovar Typhimurium WDCM 00031-ATCC® 14028™ MicroPellet RT MPRTS018
MicroPelletRT Salmonella enterica subsp. enterica serovar Choleraesuis ATCC® 10708™ MicroPellet RT MPRTS102
MicroPelletRT Salmonella abony WDCM 00029-NCTC®  6017™ MicroPellet RT MPRTS100
MicroPelletRT Pseudomonas aeruginosa WDCM 00026-ATCC® 9027™ MicroPellet RT MPRTP030
MicroPelletRT Pseudomonas aeruginosa WDCM 00025-ATCC® 27853™ MicroPellet RT MPRTP028
MicroPelletRT Listeria monocytogenes ATCC® 19115™ MicroPellet RT MPRTL013
MicroPelletRT Lactobacillus fermentum ATCC® 9338™ MicroPellet RT MPRTL016
MicroPelletRT Kocuria rhizophila ATCC® 9341™ MicroPellet RT MPRTK013
MicroPelletRT Geobacillus stearothermophilus ATCC® 7953™ MicroPellet RT MPRTB006