Which of the following is recommended prophylaxis for at‑risk patients?

• A. Antibiotic Prophylaxis in At-Risk Patients
• B. Antimicrobial Coated CVC Catheters in Adults
• C. Chlorhexidine Skin Prep
• D. Hand Hygiene With Alcohol Sanitizer

Answer: (A)

Prophylactic antibiotics are used to prevent infections in people who are severely immunosuppressed, such as those undergoing chemotherapy who develop prolonged neutropenia or patients after stem cell transplantation. When neutrophil counts are low, the body’s ability to fight bacteria is diminished, so giving antibiotics proactively can reduce the risk of serious bacterial infections, fever, and even death. This targeted preventive approach is applied to individuals with a high risk of infection based on anticipated duration and severity of neutropenia and local resistance patterns, balancing benefits with potential downsides like antibiotic resistance and adverse effects.

Other infection-prevention measures—such as hand hygiene with alcohol sanitizer, chlorhexidine skin prep, and antimicrobial-coated central venous catheters—lower risk by reducing exposure or colonization but do not provide systemic antibacterial protection in the same way as prophylactic antibiotics.