Growth Promotion Test Suspensions provide a quality
control challenge to each batch or lot of medium, ensuring
its growth promoting qualities,

whether it is prepared
internally from basic ingredients or purchased commercially
prepared. Simply inoculate each batch or lot of medium,
no rehydration, dilution or reconstitution required. Visible
growth after incubation indicates the culture media is conducive
to organism growth.
NAMSA Growth Promotion Test Suspensions are ready-touse
microbial suspensions that meet the requirements for
media performance testing. All suspensions comply with
the requirement for population of <100 colony forming
units (CFU) and are guaranteed to be within five passages
of an original stock culture. All Growth Promotion Test
Suspensions are provided as pure cultures in 2.5 ml or 10
ml volumes containing 25 or 100 doses (0.1 ml each). Store
suspensions under refrigerated conditions 5°C ± 3°C.
Growth Promotion Test Suspensions are sold in glass vials
with screw-top caps containing a septum. The screw-top
cap with septum allows for access of contents using either
a pipette or a needle and syringe.The organisms can be used to
manufacture suspensions with population levels up to 106 /0.1
ml or higher. Please inquire for information on population levels
greater than 100 colony forming units (CFU’s) /0.1 ml for the
Growth Promotion organisms.
Growth Promotion Test Suspensions
NAMSA Code Organism Shelf-Life
10 ml 2.5 ml
GP-01 GP25-01 Bacillus subtilis 14 months
GP-02 GP25-02 Clostridium sporogenes 14 months
GP-03 GP25-03 Candida albicans 12 weeks
GP-04 GP25-04 Aspergillus niger 7 months
GP-05 GP25-05 Kocuria rhizophila 16 weeks
GP-06 GP25-06 Geobacillus stearothermophilus 18 months
GP-07 GP25-07 Pseudomonas aeruginosa 12 weeks
GP-08 GP25-08 Staphylococcus aureus 8 weeks
GP-09 GP25-09 Escheria coli 12 weeks
GP-10 GP25-10 Bacillus atrophaeus 12 months
GP-11 GP25-11 Salmonella enterica 12 weeks

GPDS.pdf