According to the CDC guidelines, how frequently should biological monitoring (spore testing) be performed on a dental autoclave?

The CDC recommends that biological indicators (spore tests using Bacillus stearothermophilus or Geobacillus stearothermophilus for steam autoclaves) be used at least weekly to monitor sterilizer function in dental offices. Performing spore testing monthly is NOT sufficient per CDC guidelines — weekly is the minimum recommended frequency. Some state dental boards require more frequent testing. Additionally, spore tests should be performed whenever a new sterilizer is put into service, after any repair, and after training of new personnel. Chemical and mechanical monitoring should be performed with every load.