@masrock65: Answer: B. Spore test Biological indicators contain highly resistant bacterial spores and provide the most direct assessment of sterilization effectiveness. ❌ A. Pressure gauge: Measures chamber pressure but does not verify microbial destruction. ❌ C. Chemical indicator: Reacts to specific processing conditions but cannot independently prove sterility. ❌ D. Temperature display: Shows temperature achieved, not whether resistant spores were destroyed. MA Pearl: Steam sterilizers use biological indicators containing Geobacillus stearothermophilus spores. The CDC recommends biological monitoring at least weekly, with additional testing when indicated. #MAsRock #CCMAPractice #Autoclave #MedicalAssistantStudent #PatientSafety