NOT listed as one of the three common causes of healthcare-associated infections?

• A. Contamination or Defects on Medical Products/Devices
• B. Lapses in Infection Prevention Practices
• C. Colonization or Infection of Healthcare Personnel
• D. Antibiotic Resistance in Pathogens

Answer: (D)

The main idea is that HAIs typically arise from direct factors in the care environment: exposure to contaminated or defective medical products or devices, lapses in infection prevention practices, and transmission from healthcare personnel who are colonized or infected. Contaminated devices can introduce pathogens directly into a patient, and failures in proper cleaning, disinfection, and aseptic technique create opportunities for transmission. Staff who are colonized or infected can unknowingly pass organisms to patients during care.

Antibiotic resistance in pathogens, while critically important to treatment and outcomes, is not a direct cause of acquiring an infection in the first place. It makes infections harder to treat and can contribute to longer illness and bigger outbreaks, but the initial acquisition is driven by device contamination, lapses in prevention, and transmission from personnel.