Chapter 28: Infection Prevention and Control

The text defines the infectious process, distinguishing between colonization, symptomatic infections, and communicable diseases, while detailing the six essential links in the chain of infection: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host. Significant attention is given to the body's natural defenses, including normal flora, specific organ system mechanisms like ciliary action in the respiratory tract, and the inflammatory response, which involves vascular and cellular changes to neutralize pathogens. The summary explores the epidemiology of health care-associated infections (HAIs), categorizing them into exogenous, endogenous, and iatrogenic types, and highlights the growing challenge of multidrug-resistant organisms (MDROs) like MRSA, VRE, and C. difficile. A major focus is placed on the nursing process, guiding practitioners through the assessment of risk factors such as age, nutritional status, stress, and chronic disease, followed by the formulation of nursing diagnoses and patient-centered planning. Implementation strategies are rigorously detailed, covering health promotion activities like immunization and hygiene, as well as acute care interventions. The distinction between medical asepsis, or clean technique, and surgical asepsis, or sterile technique, is thoroughly explained, including specific principles for maintaining a sterile field and performing surgical hand antisepsis. The chapter outlines the hierarchy of isolation guidelines, starting with Standard Precautions applicable to all patients, which include hand hygiene, respiratory etiquette, and safe injection practices. It further delineates Transmission-Based Precautions—Contact, Droplet, and Airborne—specifying the necessary personal protective equipment (PPE) such as gowns, gloves, face shields, and N95 respirators for specific pathogens like tuberculosis, influenza, and COVID-19. Additionally, it addresses the psychological impact of isolation on patients and the importance of a supportive environment. Procedures for cleaning, disinfection, and sterilization of medical equipment are categorized based on item criticality. Finally, the text reviews occupational health protocols for exposure to bloodborne pathogens like HIV and Hepatitis B and C, emphasizing the importance of immediate reporting and post-exposure prophylaxis.