Cytomegalovirus causes:

Correct Answer: B

Rationale: CMV commonly causes retinitis in immunocompromised patients, especially HIV/AIDS.

Correct Answer: D

Rationale: Hand antisepsis is indicated in all these scenarios to ensure sterile conditions and prolonged pathogen reduction.

Correct Answer: D

Rationale: Health education in infection control aims to raise awareness, involve all stakeholders in prevention efforts, and ensure continuous monitoring by health professionals, making D the most comprehensive and correct answer.

Correct Answer: D

Rationale: All listed options—infected infusants, antiseptic solutions (if contaminated), health personnel, and medical equipment—can be sources of infection in HCFs, making E the correct answer.

Correct Answer: D

Rationale: All listed barriers—gloves, masks, eye glasses, and gowns—protect staff from microorganisms, making E correct.