Which of the following microorganisms must EPA registered germicides demonstrate effectiveness against?

• A. Escherichia coli
• B. Pseudomonas aeruginosa
• C. Clostridium difficile
• D. Mycobacterium tuberculosis

Answer: (B)

To understand the importance of Pseudomonas aeruginosa in the context of EPA registered germicides, it is crucial to recognize that this microorganism is known for its resilience and resistance to many disinfectants. Pseudomonas aeruginosa is an opportunistic pathogen commonly associated with healthcare-associated infections, particularly in immunocompromised patients. Its ability to thrive in various environments, including in the presence of disinfectants, makes it a critical organism that germicides must effectively target.

The effectiveness against Pseudomonas aeruginosa is particularly emphasized in EPA registration standards for disinfectants. This ensures that healthcare facilities can utilize germicides that not only reduce the presence of common pathogens but also those that are more challenging to eradicate. By demonstrating efficacy against such a resilient organism, manufacturers can provide a stronger assurance of a germicide’s effectiveness in preventing infections in clinical settings. The focus on this microorganism underscores the need for rigorous standards in infection control and patient safety.