Health authorities in Argentina are investigating a rise in hantavirus cases amid a health scare on the MV Hondius cruise ship. This vessel, which began its journey in Ushuaia, has reported multiple infections among its passengers.
The Argentine Health Ministry revealed 101 hantavirus cases since June 2025, nearly double the previous year's numbers. Experts suggest that climate change is expanding the habitats of hantavirus-carrying rodents, contributing to this alarming trend.
Climate Change and Hantavirus Spread
Higher temperatures and changing ecosystems are allowing rodents to thrive in more areas, increasing the risk of hantavirus transmission. The disease, typically contracted through contact with rodent droppings or saliva, poses severe health risks.
Argentina has become more tropical because of climate change, and that has brought disruptions... but also new tropical plants that produce seeds for mice to proliferate.
Hugo Pizzi, Infectious Disease Specialist
The Andes virus, a strain of hantavirus found in South America, can cause hantavirus pulmonary syndrome, which has a mortality rate that rose to nearly 30% last year. This significant increase has raised concerns among health officials.
Passengers aboard the Hondius tested positive for the Andes virus. Authorities are collaborating with international health organizations to enhance detection efforts.
Tracing the Source of Infection
Officials are working to determine the travel itinerary of the infected passengers prior to boarding. Their investigation includes tracking locations visited in Argentina, particularly Ushuaia, known for bird-watching activities.
The first fatalities related to this outbreak occurred on board the ship, with three passengers succumbing to the virus in April and May.
Although the hantavirus can incubate for one to eight weeks, making it challenging to pinpoint the source of infection, authorities suspect the couple contracted the virus during outdoor activities in Ushuaia.
Impact of Climate Variability
Argentina's recent climate events, including severe drought followed by heavy rainfall, have exacerbated the hantavirus situation. These fluctuations create favorable conditions for rodent populations to flourish.
As more cases emerge, the Health Ministry issued alerts earlier this year to raise awareness about the dangers of hantavirus, particularly in rural areas where healthcare facilities are often under-resourced.
Local residents are urged to recognize early symptoms, which can mimic flu-like conditions, to seek immediate medical attention.