🟠 Moderate Evidence
UK health authorities have published comprehensive guidance on Andes hantavirus following increased surveillance of the pathogen in South American regions. The UK Health Security Agency guidance addresses epidemiological patterns, clinical management, and diagnostic protocols for this potentially fatal rodent-borne virus.
Key takeaways
- Andes hantavirus causes hantavirus pulmonary syndrome with case fatality rates reaching 40%
- Transmission occurs through inhalation of aerosolised rodent excreta, primarily from long-tailed pygmy rice rats
- Person-to-person transmission has been documented, unlike other hantavirus strains
Epidemiological patterns emerge across South America
Andes hantavirus demonstrates distinct geographical distribution across Argentina, Chile, Bolivia, and southern Brazil, according to the US Centers for Disease Control and Prevention. The virus primarily circulates among long-tailed pygmy rice rats (Oligoryzomys longicaudatus), with human infections occurring through inhalation of virus-contaminated aerosols from rodent urine, droppings, or saliva.
Unlike other hantavirus species, Andes virus exhibits documented person-to-person transmission capabilities, particularly in household settings. This unique characteristic has prompted enhanced surveillance protocols among international health authorities.
Andes Hantavirus Geographic Distribution
Primary endemic regions in South America
Source: UK Health Security Agency, 2024 | Georgian Medical Journal News
Clinical presentation and diagnostic challenges
Hantavirus pulmonary syndrome typically presents with a prodromal phase characterised by fever, myalgia, and gastrointestinal symptoms lasting 3-5 days. The World Health Organization describes rapid progression to cardiopulmonary phase with capillary leak syndrome and acute respiratory distress.
Diagnosis relies on serological testing, including IgM ELISA and RT-PCR methods. The UK guidance emphasises the importance of travel history screening for patients presenting with compatible symptoms who have visited endemic regions within the preceding six weeks.
Person-to-person transmission of Andes virus occurs in approximately 20% of household contacts during acute illness
— UK Health Security Agency Epidemiological Review (2024)
Prevention and control measures
Prevention strategies focus on reducing rodent exposure in endemic areas through environmental management and personal protective measures. The CDC recommends sealing holes and gaps in homes, removing potential nesting sites, and using appropriate respiratory protection when cleaning potentially contaminated areas.
Healthcare workers managing suspected cases should implement contact and droplet precautions due to documented human-to-human transmission potential. The guidance emphasises early recognition and supportive care as primary therapeutic interventions, given the absence of specific antiviral treatments or vaccines.
What this means
Frequently asked questions
How is Andes hantavirus transmitted?
Transmission occurs primarily through inhalation of aerosolised rodent excreta from infected long-tailed pygmy rice rats. Unlike other hantaviruses, person-to-person transmission has been documented in household settings.
What are the symptoms of hantavirus pulmonary syndrome?
Initial symptoms include fever, muscle aches, and gastrointestinal problems, followed by rapid onset of breathing difficulties and fluid accumulation in the lungs. The case fatality rate can reach 40%.
Is there treatment available for Andes hantavirus?
No specific antiviral therapy or vaccine exists for Andes hantavirus. Treatment focuses on supportive care, particularly respiratory and cardiovascular support in intensive care settings.
The publication of this guidance reflects growing international concern about hantavirus emergence and the need for coordinated surveillance efforts. As climate change and ecological disruption potentially expand rodent habitats, health authorities emphasise the importance of maintaining diagnostic capabilities and clinical awareness for this severe respiratory pathogen.
Source: Andes hantavirus: epidemiology, outbreaks and guidance
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