Which of the following is NOT a factor contributing to hospital-acquired infections?

• A. Some hospital workers can be asymptomatic carriers of a disease.
• B. Some types of bacteria are resistant to disinfectants.
• C. Some patients are allergic to certain medications.
• D. Invasive procedures can result in infections when sanitation procedures are not met.
• E. All the above may contribute to hospital-acquired infection.

Answer: (C)

Verified step by step guidance

1. Step 1: Understand what hospital-acquired infections (HAIs) are — these are infections patients get while receiving treatment in a hospital or healthcare facility, which were not present or incubating at the time of admission.
2. Step 2: Identify common factors that contribute to HAIs, such as asymptomatic carriers among hospital workers who can unknowingly spread pathogens, bacteria resistant to disinfectants making sterilization difficult, and invasive procedures that can introduce microbes if sanitation is inadequate.
3. Step 3: Analyze the option 'Some patients are allergic to certain medications' — consider whether allergies to medications directly cause infections or if they are related to infection risk.
4. Step 4: Recognize that while allergies can complicate treatment, they do not directly contribute to the acquisition or spread of infections in the hospital setting, unlike the other factors listed.
5. Step 5: Conclude that the correct answer is the factor that does NOT contribute to hospital-acquired infections, which is the patient allergy option, because it is unrelated to infection transmission or microbial contamination.