A nurse is caring for a 72-year-old patient with herpes zoster (shingles) affecting the left thoracic dermatome. Which nursing intervention is the highest priority to prevent complications?

Implementing contact and airborne precautions until lesions crust over is the priority to prevent transmission of varicella-zoster virus to susceptible individuals. Other interventions manage symptoms but do not prevent spread.

Understanding the Priority: Infection Control and Transmission Prevention

When caring for a patient with herpes zoster, the nurse must prioritize interventions based on the hierarchy of patient safety. While comfort measures and skin care are important components of the care plan, the highest priority is always preventing the transmission of the varicella-zoster virus (VZV) to vulnerable populations. The correct answer is implementing contact and airborne precautions because a patient with active shingles lesions can serve as a source for a nosocomial outbreak.

Pathophysiology and Transmission Risk
Herpes zoster results from the reactivation of the latent VZV in the dorsal root ganglia. The fluid within the vesicles of a shingles rash contains a high viral load. When susceptible individuals—those who have never had chickenpox or the varicella vaccine—come into direct contact with these lesions, they can develop primary varicella infection (chickenpox). This is a critical safety concern in any healthcare setting. A documented nosocomial outbreak in a long-term care unit, as described by Saksena et al., demonstrated that a single case of shingles can trigger a chain of transmission, leading to multiple laboratory-confirmed cases of varicella zoster infection within a week ^[1]. The index case in that outbreak was a patient with shingles, highlighting that reactivated VZV is a significant infection control threat.

Rationale for Airborne and Contact Precautions
The requirement for airborne precautions, in addition to contact precautions, is based on the dual nature of VZV transmission. The virus is not only transmitted through direct contact with vesicular fluid but is also airborne via aerosolized viral particles from the lesions. A case report by Utpat et al. details a scenario where a patient acquired hospital-acquired chickenpox during a prolonged stay, with the likely source being a healthcare worker exposed to a patient with herpes zoster ^[2]. This underscores that standard contact precautions alone are insufficient to contain the virus. The airborne route necessitates a negative pressure room and the use of an N95 respirator or equivalent for all individuals entering the room. These precautions must remain in place until all lesions have dried and crusted over, at which point the patient is no longer infectious.

Analysis of Incorrect Options
The other options, while clinically appropriate, are not the highest priority.
- Applying cool, wet compresses and encouraging loose-fitting cotton clothing are comfort measures aimed at reducing local irritation and pain. They do not address the immediate safety risk of viral transmission to others.
- Administering prescribed analgesics on a regular schedule is essential for managing the neuropathic pain associated with herpes zoster, but pain management is secondary to the public health imperative of preventing an outbreak. A consensus document on infection control in long-term care facilities emphasizes that older adults are highly vulnerable to vaccine-preventable diseases like herpes zoster due to immunosenescence, making the containment of the virus the most urgent nursing action . Furthermore, the clinical presentation of herpes zoster in a hospitalized patient must prompt immediate isolation, as it can also be a marker for undiagnosed immunodeficiency, adding another layer of risk for severe outcomes in exposed individuals .