Contributed By:
Sanaa Zoghby, BSN, MPH, CIC, CHRMO
Lead Consultant, Infection Prevention and Control- MEDHEALTH PRO
Hantavirus is a zoonotic viral infection primarily transmitted to humans through contact with infected rodents or their excreta. Hantavirus infections remain uncommon but potentially severe, especially when diagnosis and supportive management are delayed.
Different hantavirus strains exist worldwide. In the Americas, the disease is commonly associated with Hantavirus Pulmonary Syndrome (HPS), characterized by severe respiratory involvement. In Europe and Asia, some strains are more associated with Hemorrhagic Fever with Renal Syndrome (HFRS). The principal reservoir is wild rodents, particularly mice and rats, which may carry the virus without appearing ill.
Transmission
Transmission to humans occurs mainly through inhalation of aerosolized particles contaminated with rodent urine, saliva, or droppings. Infection may also occur through direct contact with contaminated surfaces or, less commonly, rodent bites. Human-to-human transmission is considered extremely rare and has only been documented with specific strains in limited geographical regions. Therefore, environmental exposure and rodent control remain the cornerstone of prevention.
Clinical Manifestations
Clinical manifestations usually begin with nonspecific flu-like symptoms such as fever, fatigue, headache, myalgia, chills, nausea, abdominal pain, and dizziness. In severe cases, patients may rapidly progress to respiratory distress, pulmonary edema, hypotension, and shock. The incubation period generally ranges from 1 to 8 weeks after exposure. Since early symptoms mimic many common viral illnesses, maintaining a high index of suspicion is essential, especially in patients with recent rodent exposure or travel to endemic areas.
Treatment
Currently, there is no specific antiviral treatment universally recommended for hantavirus infection. Management is mainly supportive and may require intensive care monitoring, oxygen therapy, and ventilatory support in severe pulmonary cases. Early recognition and rapid referral to appropriate healthcare settings significantly improve patient outcomes.
Prevention Measures
Recently, international health authorities investigated reports of a suspected hantavirus cluster linked to cruise ship travel involving several severe cases and associated fatalities. Although investigations are ongoing and the overall public health risk remains low, the event attracted international attention because hantavirus infections are usually associated with environmental rodent exposure rather than travel-related clusters. This situation highlighted the importance of rapid surveillance systems, international communication, environmental assessment, contact tracing, and strict infection prevention and control measures during the management of emerging infectious disease events.
Key preventive measures include the following:
- Effective rodent control programs
- Proper environmental sanitation
- Safe cleaning and disinfection of contaminated areas
- Avoiding dry sweeping or vacuuming rodent-contaminated materials
- Use of appropriate personal protective equipment (PPE) during cleaning activities
- Education and awareness for healthcare workers and the community
Role of the Infection Control Professional
From an Infection Prevention and Control (IPC) perspective, the role of the Infection Control Professional (ICP) is essential in the early detection and proper management of suspected cases. ICPs contribute through surveillance, rapid risk assessment, implementation of standard and transmission-based precautions when indicated, staff education, environmental monitoring, and coordination with occupational health and public health authorities. Early identification of potential cases allows timely isolation precautions, appropriate environmental decontamination, and immediate investigation of possible exposure sources, thereby reducing the risk of further transmission and protecting both healthcare workers and patients.
Strong IPC programs, continuous staff awareness, multidisciplinary collaboration, and preparedness plans remain critical components in managing emerging infectious diseases, including hantavirus outbreaks. Early detection, prompt reporting, and adherence to infection prevention measures are fundamental to limiting transmission and ensuring patient and staff safety.
Sources:
1. Centers for Disease Control and Prevention (CDC) – Hantavirus
2. CDC – Hantavirus Pulmonary Syndrome (HPS) Clinical Overview
3. World Health Organization (WHO) – Hantavirus Fact Sheet
4. APIC – Infection Prevention and Emerging Infectious Diseases Resources
5. WHO Disease Outbreak News