The spore counts in MMP showed insignificant decrease during storage at 30 °C and 5 °C. Spores survive even in most adverse conditions[33].
An insignificant reduction in spore count from an initial number of 4.5×102 to 4.0×102 in high heat SMP after storage for 6 months at 30 °C is observed by Muir et al. [32].