A nurse is caring for a patient with Clostridium difficile infection. Which isolation precaution should the nurse implement?

Contact precautions with gloves and gown are required for C. difficile infection due to transmission via direct contact with contaminated surfaces and spores. Airborne, droplet, and standard precautions are not appropriate for this contact-spread pathogen.

Understanding the Pathogen and Transmission
The patient in this scenario has a Clostridium difficile (C. difficile) infection. C. difficile is a spore-forming, gram-positive anaerobic bacillus that is a leading cause of hospital-acquired diarrhea ^[2]. The clinical significance for nursing practice lies in its primary mode of transmission. The organism is shed in feces, and transmission occurs via the fecal-oral route, most commonly through direct or indirect contact with contaminated surfaces or the hands of healthcare personnel ^[2]. The spores are highly resilient and can persist on environmental surfaces for extended periods, making rigorous infection control critical to prevent healthcare-associated transmission ^[2].

Rationale for Selecting Contact Precautions
The correct intervention is to implement Contact Precautions. This is the standard of care for preventing the transmission of epidemiologically important pathogens like C. difficile that are spread by direct or indirect contact ^[3]. A systematic review on preventing transmission of multidrug-resistant organisms confirms that contact precautions, which include the use of gloves and gowns for all interactions that may involve contact with the patient or their environment, are a foundational safety practice for organisms with this mode of transmission ^[3]. The physical barrier created by the gown and gloves interrupts the chain of infection by preventing the contamination of the healthcare worker’s clothing and hands, which could then serve as a vector to other patients.

Why Other Precautions Are Incorrect
- Airborne precautions with an N95 respirator are reserved for pathogens that are transmitted via small droplet nuclei (≤5 microns) that can remain suspended in the air and be inhaled, such as Mycobacterium tuberculosis. C. difficile is not transmitted through the airborne route, making this level of respiratory protection unnecessary for routine care.
- Droplet precautions with a surgical mask are indicated for pathogens transmitted through large respiratory droplets generated during coughing, sneezing, or certain procedures, such as influenza virus or Bordetella pertussis. As C. difficile is a gastrointestinal pathogen not expelled via the respiratory tract, droplet precautions are not applicable.
- Standard precautions only are insufficient. While standard precautions, including hand hygiene, are the foundation for all patient care, they must be expanded to transmission-based precautions when a known or suspected pathogen has a specific route of transmission. For C. difficile, standard precautions alone do not provide the environmental and barrier protection needed to contain the spores.

Critical Nursing Application: Hand Hygiene and Environmental Control
A vital nuance for NCLEX-RN success is the specific hand hygiene method required when caring for a patient with C. difficile. The spore-forming nature of the organism renders alcohol-based hand rubs significantly less effective. The Asia Pacific Society of Infection Control (APSIC) guidelines for environmental hygiene emphasize the importance of proper cleaning and disinfection, and this principle extends to hand hygiene . Therefore, after removing gloves and gown, the nurse must perform hand hygiene using soap and water. The mechanical friction and rinsing action are essential for physically removing spores from the hands. Additionally, the patient should be placed in a single room, and dedicated or disposable patient-care equipment must be used to minimize the risk of cross-contamination. Environmental cleaning should be performed with a sporicidal agent, as standard disinfectants are often ineffective against C. difficile spores .