Droplet Precautions
For this 32-year-old man with confirmed influenza (positive throat swab, on oseltamivir), droplet precautions should be implemented. The answer is D. Droplet.
Rationale Based on CDC Guidelines
The CDC Healthcare Infection Control Practices Advisory Committee guidelines explicitly recommend droplet precautions as the primary isolation strategy for patients with diagnosed influenza 1. This is a Category IB recommendation, indicating strong evidence supporting this approach.
Specific Implementation Requirements
According to the guidelines, the following measures should be taken 1:
- Private room placement or cohort with other confirmed influenza patients
- Surgical mask required when entering the room or working within 3 feet of the patient
- Limit patient transport to essential purposes only; if transport necessary, patient should wear surgical mask
- Standard precautions in addition to droplet precautions:
- Hand hygiene before and after patient contact
- Gloves if contact with respiratory secretions expected
- Gown if soiling of clothes with respiratory secretions anticipated
Why Not Other Precautions?
Airborne precautions (negative pressure rooms) are NOT recommended - The guidelines explicitly state "no recommendation can be made for maintaining negative air pressure in rooms of patients in whom influenza is suspected or diagnosed" 1. This is classified as an unresolved issue, meaning insufficient evidence supports routine airborne precautions for seasonal influenza.
Contact precautions alone are insufficient - While the guidelines note contact precautions as an "unresolved issue" for addition to droplet precautions, they are not recommended as the sole isolation measure 1.
Standard precautions alone are inadequate - Standard precautions are always required but must be supplemented with droplet precautions for influenza 1.
Clinical Context
The presence of pneumonia (right middle lobe infiltrate) does not change the isolation requirements - influenza transmission occurs primarily through respiratory droplets generated during coughing, sneezing, and talking 2. These droplets typically travel only 3-6 feet and do not remain suspended in air like true airborne particles, which is why droplet rather than airborne precautions are appropriate.
Common Pitfall to Avoid
Do not confuse this with COVID-19 protocols or avian influenza, where airborne precautions may be indicated. For seasonal influenza confirmed by laboratory testing, droplet precautions remain the evidence-based standard 1, 2.